nq2.htm



 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY
 
Investment Company Act file number 811-21449
 
Nuveen Municipal High Income Opportunity Fund
(Exact name of registrant as specified in charter)
 
Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)
 

Kevin J. McCarthy
Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)
 
Registrant's telephone number, including area code:         312-917-7700        
 
Date of fiscal year end:            10/31          
 
Date of reporting period:         1/31/16         
 
Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.
 
A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

 
 
 

 
 
Item 1. Schedule of Investments
 
           
   
Portfolio of Investments
     
           
   
Nuveen Municipal High Income Opportunity Fund (NMZ)
     
   
January 31, 2016 (Unaudited)
     
 
 
Principal
   
Optional Call
   
Amount (000)
 
Description (1)
Provisions (2)
Ratings (3)
Value
   
LONG-TERM INVESTMENTS 114.9% (100.0% of Total Investments)
     
           
   
MUNICIPAL BONDS 113.4% (98.7% of Total Investments)
     
           
   
Alabama – 1.7% (1.5% of Total Investments)
     
$ 1,000
 
Adamsville Solid Waste Disposal Authority, Alabama, Solid Waste Disposal Revenue Bonds, Green
8/20 at 100.00
N/R
$ 882,390
   
Mountain Management LLC Project, Series 2010, 8.750%, 8/01/30 (4)
     
1,000
 
Alabama Industrial Development Authority, Solid Waste Disposal Revenue Bonds, Pine City Fiber
4/16 at 100.00
B3
1,004,450
   
Co. Project, Series 1993, 6.450%, 12/01/23 (Alternative Minimum Tax)
     
2,000
 
Alabama Private Colleges and University Facilities Authority, Limited Obligation Bonds,
9/25 at 100.00
N/R
2,049,660
   
University of Mobile Project, Series 2015A, 6.000%, 9/01/45
     
1,770
 
Bessemer, Alabama, General Obligation Warrants, Series 2007, 6.500%, 2/01/37
2/17 at 101.00
N/R (5)
1,866,040
   
(Pre-refunded 2/01/17)
     
2,000
 
Jefferson County, Alabama, General Obligation Refunding Warrants, Series 2003A, 5.000%,
4/16 at 100.00
AA–
2,001,020
   
4/01/22 – NPFG Insured
     
1,000
 
Jefferson County, Alabama, General Obligation Warrants, Series 2004A, 5.000%, 4/01/24 –
4/16 at 100.00
AA–
1,012,300
   
NPFG Insured
     
1,000
 
Jefferson County, Alabama, Limited Obligation School Warrants, Education Tax Revenue Bonds,
7/16 at 100.00
A–
1,009,800
   
Series 2004A, 5.000%, 1/01/24
     
1,000
 
Jefferson County, Alabama, Sewer Revenue Warrants, Senior Lien Series 2013C, 0.000%,
10/23 at 105.00
AA
745,700
   
10/01/38 – AGM Insured
     
1,030
 
Selma Industrial Development Board, Alabama, Environmental Improvement Revenue Bonds, Zilkha
No Opt. Call
N/R
1,036,293
   
Biomass Selma LLC Project, Series 2015, 7.500%, 5/01/25 (Alternative Minimum Tax)
     
11,800
 
Total Alabama
   
11,607,653
   
Arizona – 4.3% (3.8% of Total Investments)
     
1,420
 
Arizona Health Facilities Authority, Hospital Revenue Bonds, Banner Health Systems, Tender Option
1/18 at 100.00
AA–
1,738,818
   
Bond Trust 2015-XF2046, 18.223%, 1/01/29 (IF) (6)
     
1,760
 
Arizona Health Facilities Authority, Hospital Revenue Bonds, Banner Health Systems, Tender
1/18 at 100.00
AA–
2,213,394
   
Option Bond Trust 4695, 19.710%, 1/01/32 (IF) (6)
     
1,000
 
Estrella Mountain Ranch Community Facilities District, Goodyear, Arizona, General Obligation
7/17 at 100.00
N/R
1,038,380
   
Bonds, Series 2007, 6.200%, 7/15/32
     
243
 
Estrella Mountain Ranch Community Facilities District, Goodyear, Arizona, Special Assessment
4/16 at 100.00
N/R
243,824
   
Lien Bonds, Series 2001A, 7.875%, 7/01/25
     
3,000
 
Phoenix Industrial Development Authority, Arizona, Lease Revenue Bonds, Rowan University
6/22 at 100.00
A
4,064,640
   
Project, Tender Option Bond Trust 1086, 17.212%, 6/01/42 (IF) (6)
     
25
 
Pima County Industrial Development Authority, Arizona, Charter School Revenue Bonds, Choice
No Opt. Call
N/R
25,264
   
Education and Development, Series 2006, 6.000%, 6/01/16
     
1,000
 
Pima County Industrial Development Authority, Arizona, Charter School Revenue Bonds, Desert
5/24 at 100.00
N/R
1,088,820
   
Heights Charter School, Series 2014, 7.250%, 5/01/44
     
2,000
 
Pima County Industrial Development Authority, Arizona, Education Facility Revenue Bonds, San
2/24 at 100.00
N/R
2,035,900
   
Tan Montessori School Project, Series 2014A , 9.000%, 2/01/44
     
480
 
Pima County Industrial Development Authority, Arizona, Education Revenue Bonds Legacy
7/19 at 100.00
N/R (5)
586,637
   
Traditional School Project, Series 2009, 8.500%, 7/01/39 (Pre-refunded 7/01/19)
     
2,250
 
Pima County Industrial Development Authority, Arizona, Education Revenue Bonds, American
7/17 at 100.00
BB
2,133,360
   
Charter School Foundation, Series 2007A, 5.625%, 7/01/38
     
2,500
 
Pima County Industrial Development Authority, Arizona, Education Revenue Bonds, Carden
1/22 at 100.00
B
2,414,150
   
Traditional Schools Project, Series 2012, 7.500%, 1/01/42
     
   
Pima County Industrial Development Authority, Arizona, Education Revenue Bonds, Paradise
     
   
Education Center Project, Series 2010:
     
1,315
 
6.000%, 6/01/40
6/19 at 100.00
BB+
1,363,050
500
 
6.100%, 6/01/45
6/19 at 100.00
BB+
519,015
1,150
 
Pinal County Industrial Development Authority, Arizona, Correctional Facilities Contract
4/16 at 100.00
BBB–
1,151,633
   
Revenue Bonds, Florence West Prison LLC, Series 2002A, 5.250%, 10/01/22 – ACA Insured
     
3,575
 
Quechan Indian Tribe of the Fort Yuma Reservation, Arizona, Government Project Bonds, Series
12/17 at 102.00
B–
3,464,390
   
2008, 7.000%, 12/01/27
     
2,000
 
Quechan Indian Tribe of the Fort Yuma Reservation, Arizona, Tribal Economic Development Bonds,
5/22 at 100.00
B+
2,253,920
   
Series 2012A, 9.750%, 5/01/25
     
2,500
 
Salt Verde Financial Corporation, Arizona, Senior Gas Revenue Bonds, Citigroup Energy Inc
No Opt. Call
BBB+
2,930,625
   
Prepay Contract Obligations, Series 2007, 5.500%, 12/01/37
     
1,000
 
Yuma County Industrial Development Authority, Arizona, Exempt Revenue Bonds, Far West Water &
12/17 at 100.00
N/R
956,270
   
Sewer Inc. Refunding, Series 2007A, 6.375%, 12/01/37 (Alternative Minimum Tax)
     
27,718
 
Total Arizona
   
30,222,090
   
California – 15.9% (13.8% of Total Investments)
     
1,470
 
Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Tender
No Opt. Call
AA
2,016,958
   
Option Bond Trust 2015-XF2179, 17.965%, 4/01/16 (IF)
     
1,000
 
California Enterprise Development Authority, Recovery Zone Facility Revenue Bonds, SunPower
4/21 at 100.00
N/R
1,146,840
   
Corporation – Headquarters Project, Series 2010, 8.500%, 4/01/31
     
2,205
 
California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Sonoma
4/16 at 100.00
B–
2,126,414
   
County Tobacco Securitization Corporation, Series 2005, 5.125%, 6/01/38
     
   
California Health Facilities Financing Authority, Refunding Revenue Bonds, Stanford Hospital
     
   
and Clinics, Tender Option Bond Trust 3267:
     
1,250
 
19.441%, 5/15/31 (IF) (6)
11/21 at 100.00
Aa3
2,210,200
1,875
 
20.442%, 11/15/40 (IF) (6)
11/21 at 100.00
Aa3
3,459,600
   
California Health Facilities Financing Authority, Revenue Bonds, Stanford Hospitals and
     
   
Clinics, Tender Option Bond Trust 3294:
     
250
 
17.790%, 8/15/41 (IF) (6)
8/22 at 100.00
AA
359,680
1,000
 
17.785%, 8/15/41 (IF) (6)
8/22 at 100.00
AA
1,438,590
1,020
 
California Municipal Finance Authority, Mobile Home Park Revenue Bonds, Caritas Affordable
8/24 at 100.00
N/R
1,133,822
   
Housing Inc Projects, Series 2014B, 5.875%, 8/15/49
     
1,000
 
California Municipal Finance Authority, Mobile Home Park Revenue Bonds, Caritas Projects
8/20 at 100.00
N/R
1,123,210
   
Series 2010B, 7.250%, 8/15/45
     
1,000
 
California Municipal Finance Authority, Revenue Bonds, Harbor Regional Center Project, Series
11/19 at 100.00
AA (5)
1,271,830
   
2009, 8.500%, 11/01/39 (Pre-refunded 11/01/19)
     
1,970
 
California School Finance Authority, Educational Facilities Revenue Bonds, Tri-Valley Learning
6/20 at 102.00
N/R
2,163,513
   
Corporation, Series 2012A, 7.000%, 6/01/47
     
1,300
 
California State, General Obligation Bonds, Tender Option Bond Trust 3162, 20.412%, 3/01/18 –
No Opt. Call
AA
2,148,848
   
AGM Insured (IF)
     
   
California Statewide Communities Development Authority, California, Revenue Bonds, Loma Linda
     
   
University Medical Center, Series 2014A:
     
800
 
5.250%, 12/01/44
12/24 at 100.00
BB+
866,664
1,000
 
5.500%, 12/01/54
12/24 at 100.00
BB+
1,091,650
520
 
California Statewide Communities Development Authority, Revenue Bonds, American Baptist
10/19 at 100.00
BBB+
577,845
   
Homes of the West, Series 2010, 6.250%, 10/01/39
     
4,000
 
California Statewide Communities Development Authority, Revenue Bonds, EnerTech Regional
No Opt. Call
N/R
12,600
   
Biosolids Project, Series 2007A, 5.500%, 12/01/33 (Alternative Minimum Tax) (4)
     
1,000
 
California Statewide Communities Development Authority, Special Tax Bonds, Community
9/23 at 100.00
N/R
1,069,090
   
Facilities District 2012-01, Fancher Creek, Series 2013A, 5.700%, 9/01/43
     
1,650
 
California Statewide Communities Development Authority, Statewide Community Infrastructure
9/21 at 100.00
N/R
1,801,668
   
Program Revenue Bonds, Series 2011A, 8.000%, 9/02/41
     
500
 
California Statewide Community Development Authority, Revenue Bonds, California Baptist
11/21 at 100.00
N/R
590,540
   
University, Series 2011A, 7.500%, 11/01/41
     
1,500
 
California Statewide Community Development Authority, Revenue Bonds, Daughters of Charity
4/16 at 100.00
CCC
1,489,710
   
Health System, Series 2005A, 5.000%, 7/01/39 (8)
     
2,750
 
California Statewide Community Development Authority, Revenue Bonds, Epidaurus Project, Series
3/16 at 100.00
N/R
2,755,968
   
2004A, 7.750%, 3/01/34
     
1,250
 
California Statewide Community Development Authority, Revenue Bonds, St. Joseph Health System,
7/18 at 100.00
AA–
1,386,163
   
Series 2007C, 5.750%, 7/01/47 – FGIC Insured
     
515
 
California Statewide Community Development Authority, Revenue Bonds, Sutter Health, Tender
5/18 at 100.00
AA–
688,483
   
Option Bond Trust 2015-XF2186, 17.867%, 11/15/38 (IF)
     
   
California Statewide Community Development Authority, Revenue Bonds, Sutter Health, Tender
     
   
Option Bond Trust 3102:
     
745
 
18.042%, 11/15/38 (IF) (6)
5/18 at 100.00
AA–
997,764
1,000
 
19.130%, 11/15/48 (IF) (6)
5/18 at 100.00
AA–
1,360,760
1,880
 
Daly City Housing Development Finance Agency, California, Mobile Home Park Revenue Bonds,
12/17 at 100.00
N/R
1,933,392
   
Franciscan Mobile Home Park Project, Refunding Third Tier Series 2007C, 6.500%, 12/15/47
     
2,000
 
Daly City Housing Development Finance Agency, California, Mobile Home Park Revenue Bonds,
12/17 at 100.00
A
2,070,580
   
Franciscan Mobile Home Park, Refunding Series 2007A, 5.000%, 12/15/37
     
1,340
 
Elk Grove, California, Special Tax Bonds, Community Facilities District 2005-1, Series 2007,
9/16 at 101.00
N/R
1,359,095
   
5.250%, 9/01/37
     
500
 
Fontana Public Financing Authority, California, Tax Allocation Revenue Bonds, North Fontana
4/16 at 100.00
A+
523,780
   
Redevelopment Project, Tender Option Bonds Trust 1013, 18.609%, 9/01/32 – AMBAC
     
   
Insured (IF) (6)
     
1,000
 
Fontana, California, Special Tax Bonds, Community Facilities District 31 Citrus Heights North,
9/16 at 100.00
N/R
1,011,930
   
Series 2006, 5.000%, 9/01/26
     
   
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
     
   
Bonds, Series 2007A-1:
     
6,765
 
5.000%, 6/01/33
6/17 at 100.00
B
6,319,254
9,035
 
5.750%, 6/01/47
6/17 at 100.00
B
8,689,681
2,140
 
5.125%, 6/01/47
6/17 at 100.00
B
1,913,374
2,500
 
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
6/22 at 100.00
B
2,350,800
   
Bonds, Series 2007A-2, 5.300%, 6/01/37
     
860
 
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
6/25 at 100.00
A+
1,350,303
   
Bonds, Tender Option Bond Trust 2015-XF1038, 17.300%, 6/01/45 (IF) (6)
     
   
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
     
   
Bonds, Series 2015A:
     
2,000
 
5.000%, 6/01/40 (UB) (6)
6/25 at 100.00
A+
2,293,780
2,000
 
5.000%, 6/01/45 (WI/DD, Settling 2/04/16) (UB) (6)
6/25 at 100.00
A+
2,285,080
1,500
 
Grossmont Healthcare District, California, General Obligation Bonds, Tender Option Bond Trust
No Opt. Call
Aaa
3,119,460
   
3253, 22.944%, 1/15/19 (IF)
     
   
Hercules Redevelopment Agency, California, Tax Allocation Bonds, Merged Project Area, Series2005:
     
1,000
 
5.000%, 8/01/25 – AMBAC Insured
4/16 at 100.00
N/R
1,000,630
1,000
 
5.000%, 8/01/35 – AMBAC Insured
4/16 at 100.00
N/R
1,000,390
145
 
Lancaster Redevelopment Agency, California, Tax Allocation Bonds, Combined Redevelopment
No Opt. Call
BBB
166,718
   
Project Areas Housing Programs, Series 2009, 6.875%, 8/01/39
     
190
 
Lancaster Redevelopment Agency, California, Tax Allocation Bonds, Combined Redevelopment
8/19 at 100.00
N/R (5)
229,149
   
Project Areas Housing Programs, Series 2009, 6.875%, 8/01/39 (Pre-refunded 8/01/19)
     
550
 
Lathrop Financing Authority, California, Revenue Bonds, Water Supply Project Series 2003,
4/16 at 100.00
N/R
559,575
   
6.000%, 6/01/35
     
495
 
Lee Lake Public Financing Authority, California, Junior Lien Revenue Bonds, Series 2013B,
9/23 at 100.00
N/R
551,346
   
5.250%, 9/01/32
     
850
 
Los Angeles County, California, Community Development Commission Headquarters Office Building,
9/21 at 100.00
Aa3
1,438,489
   
Lease Revenue Bonds, Community Development Properties Los Angeles County Inc., Tender Option
     
   
Bond Trust Series 2011-23B, 18.449%, 9/01/42 (IF) (6)
     
1,825
 
Los Angeles Department of Airports, California, Revenue Bonds, Los Angeles International
5/20 at 100.00
AA
2,813,420
   
Airport, Tender Option Bond Trust 10-27B, 18.366%, 5/15/40 (IF) (6)
     
1,000
 
Lynwood Redevelopment Agency, California, Project A Revenue Bonds, Subordinate Lien Series
9/21 at 100.00
A–
1,246,340
   
2011A, 7.000%, 9/01/31
     
   
March Joint Powers Redevelopment Agency, California, March Air Force Base Redevelopment
     
   
Project Tax Allocation Revenue Bonds, Series 2011A:
     
1,000
 
7.000%, 8/01/26
8/21 at 100.00
A–
1,276,780
1,500
 
7.500%, 8/01/41
8/21 at 100.00
A–
1,903,200
470
 
Moreno Valley Unified School District, Riverside County, California, Special Tax Bonds,
4/16 at 100.00
N/R
479,941
   
Community Facilities District 2005-3, Series 2007, 5.000%, 9/01/37
     
500
 
National City Community Development Commission, California, Tax Allocation Bonds, National
8/21 at 100.00
A
628,605
   
City Redevelopment Project, Series 2011, 7.000%, 8/01/32
     
330
 
Novato Redevelopment Agency, California, Tax Allocation Bonds, Hamilton Field Redevelopment
9/21 at 100.00
BBB+
401,118
   
Project, Series 2011, 6.750%, 9/01/40
     
   
Palomar Pomerado Health Care District, California, Certificates of Participation, Series 2010:
     
550
 
5.250%, 11/01/21
11/20 at 100.00
Ba1
597,828
1,000
 
6.000%, 11/01/41
11/20 at 100.00
Ba1
1,069,670
250
 
Palomar Pomerado Health, California, General Obligation Bonds, Tender Option Bond Trust 4683,
8/17 at 100.00
AA–
302,910
   
18.028%, 8/01/37 – NPFG Insured (IF) (6)
     
1,000
 
Pittsburg Redevelopment Agency, California, Tax Allocation Bonds, Los Medanos Community
9/18 at 100.00
BBB–
1,096,210
   
Development Project, Refunding Series 2008A, 6.500%, 9/01/28
     
733
 
River Rock Entertainment Authority, California, Revenue Bonds, Senior Notes Series 2011B,
4/16 at 100.00
N/R
75,118
   
8.000%, 11/01/18 (4)
     
1,200
 
Riverside County Redevelopment Agency, California, Tax Allocation Bonds, Jurupa Valley Project
10/21 at 100.00
A
1,483,656
   
Area, Series 2011B, 6.750%, 10/01/30
     
   
Sacramento City Financing Authority California, Lease Revenue Bonds, Master Lease Program
     
   
Facilities Projects, Tender Option Bond Trust 4698:
     
750
 
18.270%, 12/01/30 – AMBAC Insured (IF) (6)
No Opt. Call
A+
1,574,580
2,015
 
18.270%, 12/01/33 – AMBAC Insured (IF) (6)
No Opt. Call
A+
4,349,660
2,500
 
San Bernardino Community College District, California, General Obligation Bonds, Tender Option
8/16 at 100.00
AA (5)
2,736,800
   
Bond Trust 11780, 17.486%, 2/01/27 (Pre-refunded 8/01/16) – AGM Insured (IF)
     
   
San Buenaventura, California, Revenue Bonds, Community Memorial Health System, Series 2011:
     
960
 
8.000%, 12/01/26
12/21 at 100.00
BB+
1,262,966
1,000
 
8.000%, 12/01/31
12/21 at 100.00
BB+
1,272,990
1,000
 
San Jose, California, Airport Revenue Bonds, Tender Option Bond Trust 2015-XF01212, 17.477%,
3/17 at 100.00
AA
1,165,200
   
9/01/30 – AGM Insured (IF) (6)
     
1,000
 
Santa Margarita Water District, California, Special Tax Bonds, Community Facilities District
9/23 at 100.00
N/R
1,132,920
   
2013-1 Village of Sendero, Series 2013, 5.625%, 9/01/43
     
1,000
 
Santee Community Development Commission, California, Santee Redevelopment Project Tax
2/21 at 100.00
A
1,223,010
   
Allocation Bonds, Series 2011A, 7.000%, 8/01/41
     
1,000
 
Temecula Public Financing Authority, California, Special Tax Bonds, Community Facilities
9/16 at 100.00
N/R
1,002,650
   
District 03-02 Roripaugh, Series 2006, 5.450%, 9/01/26
     
1,000
 
Temecula Redevelopment Agency, California, Tax Allocation Revenue Bonds, Redevelopment
4/16 at 100.00
AA–
1,001,770
   
Project 1, Series 2002, 5.250%, 8/01/36 – NPFG Insured
     
1,890
 
Tobacco Securitization Authority of Northern California, Tobacco Settlement Asset-Backed
4/16 at 100.00
B–
1,776,959
   
Bonds, Series 2005A-1, 5.500%, 6/01/45
     
650
 
Twentynine Palms Redevelopment Agency, California, Tax Allocation Bonds, Four Corners Project
9/21 at 100.00
BBB+
820,339
   
Area, Series 2011A, 7.650%, 9/01/42
     
1,250
 
University of California, General Revenue Bonds, Tender Option Bond Trust 2013-24U, 18.290%,
5/23 at 100.00
AA
2,078,600
   
5/15/39 (IF) (6)
     
97,693
 
Total California
   
110,228,456
   
Colorado – 9.4% (8.2% of Total Investments)
     
2,000
 
Brighton Crossing Metropolitan District 4, Colorado, General Obligation Bonds, Limited Tax
7/18 at 100.00
N/R
2,040,860
   
Convertible to Unlimited Tax, Refunding Series 2013, 7.000%, 12/01/23
     
1,977
 
Cimarron Metropolitan District, Arvada, Colorado, Limited Tax Revenue Bonds, Convertible to
10/17 at 100.00
N/R
1,989,831
   
Unlimited Tax, Series 2012, 6.000%, 12/01/22
     
750
 
Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds,
7/18 at 100.00
BB
776,633
   
Community Leadership Academy Project, Series 2008, 6.250%, 7/01/28
     
1,000
 
Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds,
2/16 at 101.00
N/R
1,007,540
   
Jefferson County School District R-1 – Compass Montessori Secondary School, Series 2006,
     
   
5.625%, 2/15/36
     
2,320
 
Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Mountain
10/22 at 100.00
N/R
2,513,279
   
Phoenix Community School, Series 2012, 7.000%, 10/01/42
     
200
 
Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Skyview
7/24 at 100.00
BB+
212,076
   
Academy Project, Series 2014, 5.375%, 7/01/44
     
1,860
 
Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Windsor
5/17 at 100.00
BBB–
1,890,225
   
Academy, Series 2007A, 5.700%, 5/01/37
     
1,825
 
Colorado Educational and Cultural Facilities Authority, Revenue Bonds, Pikes Peak School of
6/18 at 102.00
N/R (5)
2,029,510
   
Expeditionary Learning Charter School, Series 2008, 6.625%, 6/01/38 (Pre-refunded 6/01/18)
     
2,500
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, American Baptist Homes of the
2/24 at 100.00
N/R
3,011,800
   
Midwest Obligated Group, Series 2013, 8.000%, 8/01/43
     
1,000
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, American Baptist Homes Project,
2/26 at 100.00
N/R
1,013,800
   
Series 2016, 6.125%, 2/01/46
     
1,350
 
Colorado Health Facilities Authority, Colorado, Revenue Bonds, Colorado Senior Residences
6/22 at 100.00
N/R
1,086,750
   
Project, Series 2012, 6.750%, 6/01/32 (4)
     
750
 
Colorado Health Facilities Authority, Health Facilities Revenue Bonds, Sisters of Charity of
No Opt. Call
AA–
1,167,090
   
Leavenworth Health Services Corporation, Tender Option Bond Trust 2015-XF0054,
     
   
19.047%, 1/01/18 (IF)
     
1,285
 
Colorado Health Facilities Authority, Revenue Bonds, Craig Hospital Project, Series 2012,
12/22 at 100.00
A
1,458,514
   
5.000%, 12/01/32 (UB) (6)
     
290
 
Colorado Health Facilities Authority, Revenue Bonds, Evangelical Lutheran Good Samaritan
6/16 at 100.00
BBB+
292,735
   
Society, Series 2006, 5.250%, 6/01/36
     
710
 
Colorado Health Facilities Authority, Revenue Bonds, Evangelical Lutheran Good Samaritan
6/16 at 100.00
N/R (5)
721,942
   
Society, Series 2006, 5.250%, 6/01/36 (Pre-refunded 6/01/16)
     
   
Colorado Housing and Finance Authority, Revenue Bonds, Confluence Energy LLC Project, Series 2007:
     
518
 
5.000%, 9/01/16 (Alternative Minimum Tax) (4), (7)
No Opt. Call
N/R
461,259
5,045
 
6.750%, 4/01/27 (Alternative Minimum Tax) (4)
4/17 at 100.00
N/R
4,562,395
2,224
 
Colorado Housing and Finance Authority, Revenue Bonds, Confluence Energy LLC Project, Series
No Opt. Call
N/R
2,011,006
   
2013, 6.875%, 10/01/27 (Alternative Minimum Tax) (4)
     
2,000
 
Compark Business Campus Metropolitan District, Douglas County, Colorado, General Obligation
12/22 at 100.00
N/R
2,185,260
   
Bonds, Series 2012A, 6.750%, 12/01/39 – RAAI Insured
     
   
Confluence Metropolitan District, Colorado, General Obligation Limited Tax Bonds, Series 2007:
     
1,000
 
5.400%, 12/01/27
12/17 at 100.00
N/R
970,160
1,500
 
5.450%, 12/01/34
12/17 at 100.00
N/R
1,431,915
1,000
 
Denver City and County, Colorado, Special Facilities Airport Revenue Bonds, United Air Lines
10/17 at 100.00
BB–
1,039,550
   
Corporation, Series 2007A, 5.250%, 10/01/32 (Alternative Minimum Tax)
     
2,000
 
E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2004A, 0.000%, 9/01/27 –
No Opt. Call
AA–
1,418,740
   
NPFG Insured
     
708
 
Erie Highlands Metropolitan District No. 1 (In the Town of Erie), Weld County, Colorado,
12/20 at 103.00
N/R
717,473
   
General Obligation Limited Tax Bonds, Series 2015B, 7.750%, 12/15/45
     
1,023
 
Fitzsimons Village Metropolitan District 1, Aurora, Arapahoe County, Colorado, Tax Increment
3/20 at 100.00
N/R
1,125,719
   
Public Improvement Fee Supported Revenue Bonds, Series 2010A, 7.500%, 3/01/40
     
1,000
 
Fitzsimons Village Metropolitan District 3, Arapahoe County, Colorado, Tax Increment/Public
No Opt. Call
N/R
1,018,520
   
Improvement Fee Supported Revenue Bonds, Series 2014A, 6.000%, 3/01/44
     
   
Foothills Metropolitan District, Fort Collins, Colorado, Special Revenue Bonds, Series 2014:
     
1,000
 
5.750%, 12/01/30
12/24 at 100.00
N/R
1,082,220
1,080
 
6.000%, 12/01/38
12/24 at 100.00
N/R
1,165,720
1,989
 
Great Western Metropolitan District 5, Colorado, General Obligation Limited Tax Revenue Bonds,
12/19 at 100.00
N/R
2,081,608
   
Series 2009A-1, 9.000%, 8/01/39
     
2,000
 
Heritage Todd Creek Metropolitan District, Colorado, General Obligation Bonds Limited Tax,
12/24 at 100.00
N/R
2,083,060
   
Refunding & Improvement Series 2015, 6.125%, 12/01/44
     
970
 
Heritage Todd Creek Metropolitan District, Colorado, General Obligation Bonds Limited Tax,
12/17 at 100.00
N/R
971,940
   
Series 2007A, 5.500%, 12/01/37
     
1,000
 
Iliff Commons Metropolitan District 2, City of Aurora, Arapahoe County, Colorado, General
12/20 at 100.00
N/R
1,019,200
   
Obligation Bonds, Limited Tax Convertible to Unlimited Tax Series 2015, 6.250%, 12/01/44
     
2,000
 
Jefferson Center Metropolitan District 1, Arvada, Jefferson County, Colorado, Revenue Bonds,
12/20 at 103.00
N/R
2,029,900
   
Refunding Series 2015, 5.500%, 12/01/45
     
3,145
 
Kit Carson County Health Service District, Colorado, Health Care Facility Revenue Bonds,
1/18 at 100.00
N/R
3,280,550
   
Series 2007, 6.750%, 1/01/34
     
1,250
 
Lewis Pointe Metropolitan District, Thornton, Colorado, Limited Tax Convertible to Unlimited
12/20 at 100.00
N/R
1,270,550
   
Tax General Obligation Bonds, Series 2015A, 6.000%, 12/01/44
     
5
 
Maher Ranch Metropolitan District 4, Colorado, General Obligation Limited Tax Bonds, Series
12/17 at 100.00
AA
5,130
   
2007, 5.250%, 12/01/36 – RAAI Insured
     
   
Mountain Shadows Metropolitan District, Colorado, General Obligation Limited Tax Bonds,
     
   
Series 2007:
     
976
 
5.500%, 12/01/27
12/16 at 100.00
N/R
957,739
1,000
 
5.625%, 12/01/37
12/16 at 100.00
N/R
986,800
2,000
 
Murphy Creek Metropolitan District 3, Aurora, Colorado, General Obligation Bonds, Refunding &
6/16 at 100.00
N/R
1,344,900
   
Improvement Series 2006, 6.125%, 12/01/35 (9)
     
1,080
 
Promenade at Castle Rock Metropolitan District 1, Colorado, General Obligation Bonds, Limited
12/20 at 103.00
N/R
1,120,964
   
Tax Series 2015A, 5.750%, 12/01/39
     
   
Regional Transportation District, Colorado, Denver Transit Partners Eagle P3 Project Private
     
   
Activity Bonds, Series 2010:
     
1,000
 
6.500%, 1/15/30
7/20 at 100.00
A–
1,164,170
1,000
 
6.000%, 1/15/41
7/20 at 100.00
A–
1,128,920
1,440
 
Rendezous Residential Metropolitan District, Colorado, Limited Tax General Obligation Bonds,
12/17 at 100.00
N/R
1,240,387
   
Refunding Series 2007, 5.375%, 12/01/21
     
1,000
 
STC Metropolitan District 2, Superior, Boulder County, Colorado, Limited Tax General
12/19 at 103.00
N/R
985,240
   
Obligation Bonds, Series 2015A, 6.000%, 12/01/38
     
875
 
STC Metropolitan District 2, Superior, Boulder County, Colorado, Limited Tax General
12/19 at 103.00
N/R
881,361
   
Obligation Bonds, Series 2015B, 7.750%, 12/15/38
     
3,000
 
Stone Ridge Metropolitan District 2, Colorado, General Obligation Bonds, Limited Tax
12/17 at 100.00
N/R
660,090
   
Convertible to Unlimited, Series 2007, 7.250%, 12/01/31 (10)
     
1,815
 
Three Springs Metropolitan District 3, Durango, La Plata County, Colorado, Property Tax
12/20 at 100.00
N/R
1,953,938
   
Supported Revenue Bonds, Series 2010, 7.750%, 12/01/39
     
67,460
 
Total Colorado
   
65,568,969
   
Connecticut – 0.8% (0.7% of Total Investments)
     
2,500
 
Harbor Point Infrastructure Improvement District, Connecticut, Special Obligation Revenue
4/20 at 100.00
N/R
2,977,000
   
Bonds, Harbor Point Project, Series 2010A, 7.875%, 4/01/39
     
5,157
 
Mashantucket Western Pequot Tribe, Connecticut, Special Revenue Bonds, Subordinate Series
No Opt. Call
N/R
339,111
   
2013A, 6.050%, 7/01/31 (4)
     
1,000
 
Mohegan Tribe of Indians of Connecticut, Gaming Authority Priority Distribution Payment Public
7/16 at 100.00
B–
955,790
   
Improvement Bonds, Series 2003, 5.250%, 1/01/33
     
1,000
 
Stamford, Connecticut, Special Obligation Revenue Bonds, Mill River Corridor Project, Series
4/21 at 100.00
N/R (5)
1,282,190
   
2011aA, 7.000%, 4/01/41 (Pre-refunded 4/01/21)
     
9,657
 
Total Connecticut
   
5,554,091
   
Delaware – 0.4% (0.3% of Total Investments)
     
2,500
 
Delaware Economic Development Authority, Revenue Bonds, Odyssey Charter School Inc. Project,
3/25 at 100.00
N/R
2,528,675
   
Series 2015A, 7.000%, 9/01/45
     
   
District of Columbia – 0.7% (0.6% of Total Investments)
     
225
 
District of Columbia Tobacco Settlement Corporation, Tobacco Settlement Asset-Backed Bonds,
No Opt. Call
Baa1
281,151
   
Series 2001, 6.500%, 5/15/33
     
1,000
 
District of Columbia, Revenue Bonds, Cesar Chavez Public Charter Schools for Public Policy,
11/20 at 100.00
BBB–
1,155,010
   
Series 2011, 7.500%, 11/15/31
     
2,500
 
District of Columbia, Revenue Bonds, Howard University, Tender Option Bond Trust 1006,
4/21 at 100.00
BBB
3,219,800
   
23.003%, 10/01/37 (IF) (6)
     
250
 
District of Columbia, Revenue Bonds, KIPP DC Issue, Series 2013A, 6.000%, 7/01/33
7/23 at 100.00
BBB+
293,170
3,975
 
Total District of Columbia
   
4,949,131
   
Florida – 15.6% (13.6% of Total Investments)
     
1,500
 
Alachua County Health Facilities Authority, Florida, Health Facilities Revenue Bonds, Terraces
No Opt. Call
N/R
1,783,980
   
at Bonita Springs Project, Series 2011A, 8.125%, 11/15/46
     
885
 
Ave Maria Stewardship Community District, Florida, Capital Improvement Revenue Bonds, Series
5/16 at 100.00
N/R
868,229
   
2006A, 5.125%, 5/01/38
     
1,925
 
Ave Maria Stewardship Community District, Florida, Capital Improvement Revenue Bonds, Series
5/22 at 100.00
N/R
2,044,754
   
2012, 6.700%, 5/01/42
     
1,735
 
Ave Maria Stewardship Community District, Florida, Capital Improvement Revenue Bonds, Series
5/25 at 100.00
N/R
1,757,850
   
2015, 5.375%, 5/01/45
     
1,000
 
Babcock Ranch Community Independent Special District, Florida, Special Assessment Bonds,
11/25 at 100.00
N/R
1,003,080
   
Series 2015, 5.250%, 11/01/46
     
1,035
 
Beeline Community Development District, Palm Beach County, Florida, Special Assessment Bonds,
5/18 at 100.00
N/R
1,084,121
   
Series 2008A, 7.000%, 5/01/37
     
905
 
Belmont Community Development District, Florida, Capital Improvement Revenue Bonds, Phase 1
11/24 at 100.00
N/R
1,013,555
   
Project, Series 2013A, 6.125%, 11/01/33
     
960
 
Boggy Creek Improvement District, Orlando, Florida, Special Assessment Revenue Bonds,
5/23 at 100.00
N/R
1,005,091
   
Refunding Series 2013, 5.125%, 5/01/43
     
2,700
 
Brevard County, Florida, Industrial Development Revenue Bonds, TUFF Florida Tech Project,
11/19 at 100.00
BB+
2,942,136
   
Series 2009, 6.500%, 11/01/29
     
700
 
Broward County, Florida, Airport Facility Revenue Bonds, Learjet Inc., Series 2000, 7.500%,
11/16 at 100.00
B2
704,928
   
11/01/20 (Alternative Minimum Tax)
     
1,435
 
Capital Projects Finance Authority, Student Housing Revenue Bonds, Capital Projects Loan
4/16 at 100.00
AA–
1,435,072
   
Program – Florida Universities, Series 2001F, 5.000%, 10/01/31 – NPFG Insured
     
1,000
 
Celebration Pointe Community Development District 1, Alachua County, Florida, Special
5/24 at 100.00
N/R
1,022,150
   
Assessment Revenue Bonds, Series 2014, 5.125%, 5/01/45
     
2,000
 
Collier County Industrial Development Authority, Florida, Continuing Care Community Revenue
5/24 at 100.00
N/R
2,351,640
   
Bonds, Arlington of Naples Project, Series 2014A, 7.750%, 5/15/35
     
1,000
 
Copperstone Community Development District, Manatee County, Florida, Capital Improvement
5/17 at 100.00
N/R
1,007,210
   
Revenue Bonds, Series 2007, 5.200%, 5/01/38
     
995
 
Cordoba Ranch Community Development District, Hillsborough County, Florida, Special Assessment
5/16 at 100.00
N/R
998,143
   
Revenue Bonds, Series 2006, 5.550%, 5/01/37
     
900
 
Fishhawk Community Development District IV, Hillsborough County, Florida, Special Assessment
5/23 at 100.00
N/R
983,610
   
Revenue Bonds, Series 2013A, 7.000%, 5/01/33
     
1,850
 
Florida Development Finance Corporation, Educational Facilities Revenue Bonds, Downtown Doral
7/24 at 100.00
N/R
1,945,275
   
Charter Elementary School Project, Series 2014A, 6.500%, 7/01/44
     
1,000
 
Florida Development Finance Corporation, Educational Facilities Revenue Bonds, Renaissance
9/20 at 100.00
BB+
1,044,990
   
Charter School, Inc. Projects, Series 2010A, 6.000%, 9/15/40
     
2,000
 
Florida Development Finance Corporation, Educational Facilities Revenue Bonds, Renaissance
6/21 at 100.00
BB–
2,368,900
   
Charter School, Inc. Projects, Series 2011A, 7.625%, 6/15/41
     
4,000
 
Florida Development Finance Corporation, Educational Facilities Revenue Bonds, Renaissance
6/23 at 100.00
N/R
4,671,760
   
Charter School, Inc. Projects, Series 2013A, 8.500%, 6/15/44
     
2,500
 
Grand Bay at Doral Community Development District, Miami-Dade County, Florida, Special
11/22 at 100.00
N/R
2,623,225
   
Assessment Bonds, Doral Breeze Project Series 2012, 5.500%, 11/01/32
     
1,000
 
Grand Bay at Doral Community Development District, Miami-Dade County, Florida, Special
5/24 at 100.00
N/R
1,009,090
   
Assessment Improvement Bonds, Assessment Area Two Project, Refunding Series 2014A-2,
     
   
6.500%, 5/01/39
     
845
 
Grand Hampton Community Development District, Florida, Capital Improvement Revenue Bonds,
4/16 at 100.00
N/R
845,237
   
Series 2005, 5.500%, 5/01/36
     
1,960
 
Harmony Community Development District, Florida, Capital Improvement Revenue Bonds, Special
5/24 at 100.00
N/R
2,014,037
   
Assessment, Refunding Series 2014, 5.250%, 5/01/32
     
2,700
 
Hawks Point Community Development District, Florida, Special Assessment Revenue Bonds, Series
5/17 at 100.00
N/R
2,739,771
   
2007A, 5.300%, 5/01/39
     
3,000
 
Jacksonville Economic Development Commission, Florida, Health Care Facilities Revenue Bonds,
9/17 at 100.00
N/R
3,158,700
   
Florida Proton Therapy Institute Project, Series 2007A, 6.250%, 9/01/27
     
1,000
 
Lakes by the Bay South Community Development District, Florida, Special Assessment Bonds,
11/22 at 100.00
N/R
1,052,390
   
Series 2012, 5.750%, 11/01/42
     
665
 
Lakewood Ranch Stewardship District, Florida, Special Assessment Revenue Bonds, Lakewood
No Opt. Call
N/R
678,373
   
Centre North Project, Series 2015, 4.875%, 5/01/45
     
2,000
 
Lee County Industrial Development Authority, Florida, Charter School Revenue Bonds, Lee County
6/17 at 100.00
BB
2,031,840
   
Community Charter Schools, Series 2007A, 5.375%, 6/15/37
     
1,000
 
Lee County Industrial Development Authority, Florida, Healthcare Facilities Revenue Bonds, Shell
5/17 at 100.00
BBB–
1,048,750
   
Point/Alliance Obligated Group, Shell Point Village/Alliance Community Project, Series 2007,
     
   
5.000%, 11/15/22
     
12,190
 
Miami Beach, Florida, Resort Tax Revenue Bonds, Series 2015, 5.000%, 9/01/45 (UB)
9/25 at 100.00
AA–
13,945,848
750
 
Miami-Dade County Industrial Development Authority, Florida, Revenue Bonds, Youth Co-Op
9/25 at 100.00
N/R
771,473
   
Charter Schools Project, Series 2015A, 6.000%, 9/15/45
     
1,000
 
Miami-Dade County, Florida, Aviation Revenue Bonds, Series 2008, Trust 1145, 18.220%,
10/18 at 100.00
AA
1,374,000
   
10/01/38 – AGC Insured (Alternative Minimum Tax) (IF) (6)
     
1,250
 
Miami-Dade County, Florida, Water and Sewer System Revenue Bonds, Tender Option Bond Trust
10/20 at 100.00
AA
1,939,100
   
11834, 18.095%, 10/01/33 – AGM Insured (IF)
     
1,880
 
Myrtle Creek Improvement District, Florida, Special Assessment Revenue Bonds, Series 2006A,
5/16 at 100.00
N/R
1,886,279
   
5.200%, 5/01/37
     
930
 
Northern Palm Beach County Improvement District, Florida, Water Control and Improvement Bonds,
8/26 at 100.00
N/R
942,592
   
Development Unit 53, Series 2015, 5.500%, 8/01/46
     
   
Palm Beach County Health Facilities Authority, Florida, Revenue Bonds, Sinai Residences of Boca
     
   
Raton Project, Series 2014A:
     
620
 
7.000%, 6/01/29
6/22 at 102.00
N/R
735,531
3,110
 
7.500%, 6/01/49
6/22 at 102.00
N/R
3,807,511
1,510
 
Palm Glades Community Development District, Florida, Special Assessment Bonds, Series 2006A,
5/16 at 100.00
N/R
1,513,639
   
5.300%, 5/01/36
     
4,335
 
Pine Island Community Development District, Florida, Special Assessment Bonds, Bella Collina,
4/16 at 100.00
N/R
4,335,824
   
Series 2004, 5.750%, 5/01/35
     
990
 
Poinciana West Community Development District, Florida, Special Assessment Bonds, Series 2007,
5/17 at 100.00
N/R
1,006,978
   
6.000%, 5/01/37
     
450
 
Port Saint Lucie. Florida, Special Assessment Revenue Bonds, Southwest Annexation District 1B,
7/17 at 100.00
AA–
474,597
   
Series 2007, 5.000%, 7/01/33 – NPFG Insured
     
1,855
 
Reunion West Community Development District, Florida, Special Assessment Bonds, Series
5/22 at 100.00
N/R
1,960,865
   
2004A-1, 6.250%, 5/01/36
     
990
 
Shingle Creek Community Development District, Florida, Special Assessment Revenue Bonds,
11/25 at 100.00
N/R
1,002,702
   
Series 2015, 5.400%, 11/01/45
     
975
 
South Fork Community Development District, Florida, Capital Improvement Revenue Bonds, Series
4/16 at 100.00
N/R
975,351
   
2005, 5.350%, 5/01/36
     
1,190
 
Stoneybrook Venice Community Development District, Florida, Capital Improvement Revenue Bonds,
5/18 at 100.00
N/R
1,224,843
   
Series 2007, 6.750%, 5/01/38
     
1,095
 
Sweetwater Creek Community Development District, Saint John’s County, Florida, Capital
5/17 at 100.00
N/R
1,107,603
   
Improvement Revenue Bonds, Series 2007A, 5.500%, 5/01/38
     
1,250
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Convertible,
5/17 at 100.00
N/R
1,003,038
   
Capital Appreciation, Series 2012A-2, 0.000%, 5/01/39
     
2,515
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Convertible,
5/19 at 100.00
N/R
1,509,428
   
Capital Appreciation, Series 2012A-3, 0.000%, 5/01/40
     
1,540
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Convertible,
5/22 at 100.00
N/R
685,023
   
Capital Appreciation, Series 2012A-4, 0.000%, 5/01/40
     
   
Tolomato Community Development District, Florida, Special Assessment Bonds, Hope Note,
     
   
Series 2007-3:
     
120
 
6.375%, 5/01/17 (4)
No Opt. Call
N/R
1
1,360
 
6.650%, 5/01/40 (4)
5/18 at 100.00
N/R
14
2,845
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Hope Note, Series
5/17 at 100.00
N/R
28
   
2007A-2, 5.250%, 5/01/39 (4)
     
120
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Non Performing
5/18 at 100.00
N/R
122,755
   
ParcelSeries 2007-1. RMKT, 6.650%, 5/01/40 (4)
     
735
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Non Performing
5/17 at 100.00
N/R
711,825
   
ParcelSeries 2007A-1. RMKT, 5.250%, 5/01/39 (5)
     
   
Tolomato Community Development District, Florida, Special Assessment Bonds, Refunding
     
   
Series 2012A-1:
     
90
 
6.375%, 5/01/17
No Opt. Call
N/R
89,931
535
 
5.250%, 5/01/39
5/17 at 100.00
N/R
537,418
2,350
 
6.650%, 5/01/40
5/17 at 100.00
N/R
2,381,984
3,740
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Refunding Series
5/18 at 100.00
N/R
2,314,686
   
2015-1, 0.000%, 5/01/40 (4)
     
2,300
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Refunding Series
5/18 at 100.00
N/R
1,204,648
   
2015-2, 0.000%, 5/01/40 (4)
     
2,505
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Refunding Series
5/18 at 100.00
N/R
25
   
2015-3, 6.610%, 5/01/40 (4)
     
4,370
 
Tolomato Community Development District, Florida, Special Assessment Bonds, Series 2006,
4/16 at 100.00
N/R
4,374,064
   
5.400%, 5/01/37
     
970
 
Two Creeks Community Development District, Florida, Capital Improvement Revenue Bonds, Series
5/16 at 100.00
N/R
970,359
   
2006, 5.250%, 5/01/37
     
1,000
 
Venetian Parc Community Development District, Miami-Dade County, Florida, Special Assessment
11/28 at 100.00
N/R
1,280,230
   
Bonds, Area One Project, Series 2013, 6.500%, 11/01/43
     
1,000
 
Waterset North Community Development District, Hillsborough County, Florida, Special
11/24 at 100.00
N/R
1,019,160
   
Assessment Revenue Bonds, Series 2014, 5.500%, 11/01/45
     
975
 
West Villages Improvement District, Florida, Special Assessment Revenue Bonds, Series 2006,
4/16 at 100.00
N/R
975,283
   
5.500%, 5/01/37
     
1,000
 
Windsor at Westside Community Development District, Osceola County, Florida, Special
11/25 at 100.00
N/R
1,019,600
   
Assessment Bonds, Area 1 Project, Series 2015, 5.125%, 11/01/45
     
112,635
 
Total Florida
   
108,442,123
   
Georgia – 1.6% (1.4% of Total Investments)
     
1,000
 
Atlanta Urban Residential Finance Authority, Georgia, Multifamily Housing Revenue Bonds,
11/23 at 100.00
BBB+
1,023,150
   
Trestletree Village Apartments, Series 2013A, 5.000%, 11/01/48
     
860
 
Atlanta, Georgia, Tax Allocation Bonds, Beltline Project Series 2008A. Remarketed, 7.500%, 1/01/31
1/19 at 100.00
A2
996,516
1,250
 
Clayton County Development Authority, Georgia, Special Facilities Revenue Bonds, Delta Air
6/20 at 100.00
BB
1,555,113
   
Lines, Inc. Project, Series 2009A, 8.750%, 6/01/29
     
1,880
 
Douglas County Development Authority, Georgia, Charter School Revenue Bonds, Brighten Academy
10/23 at 100.00
N/R
2,073,245
   
Project, Series 2013A, 7.125%, 10/01/43
     
1,000
 
Fulton County Development Authority, Georgia, Revenue Bonds, Amana Academy Project, Series
4/23 at 100.00
N/R
1,018,700
   
2013A, 6.500%, 4/01/43
     
1,000
 
Fulton County Residential Care Facilities Elderly Authority, Georgia, First Mortgage Revenue
7/17 at 100.00
N/R
1,010,230
   
Bonds, Lenbrook Project, Series 2006A, 5.125%, 7/01/37
     
1,140
 
Fulton County Residential Care Facilities Elderly Authority, Georgia, First Mortgage Revenue
No Opt. Call
N/R
1,171,304
   
Bonds, Lenbrook Project, Series 2006B, 7.300%, 7/01/42
     
   
Liberty County Industrial Authority, Georgia, Revenue Bonds, Series 2014:
     
392
 
5.500%, 7/15/23
7/21 at 100.00
N/R
401,737
767
 
5.500%, 7/15/30
7/21 at 100.00
N/R
786,378
842
 
5.500%, 1/15/36
7/21 at 100.00
N/R
863,305
10,131
 
Total Georgia
   
10,899,678
   
Guam – 0.5% (0.4% of Total Investments)
     
2,445
 
Guam Government, General Obligation Bonds, 2009 Series A, 7.000%, 11/15/39
11/19 at 100.00
N/R (5)
2,998,548
   
(Pre-refunded 11/15/19)
     
330
 
Guam International Airport Authority, Revenue Bonds, Series 2013C, 6.375%, 10/01/43
10/23 at 100.00
BBB
390,047
   
(Alternative Minimum Tax)
     
2,775
 
Total Guam
   
3,388,595
   
Hawaii – 0.4% (0.3% of Total Investments)
     
855
 
Hawaii Department of Budget and Finance, Private School Revenue Bonds, Montessori of Maui,
2/17 at 100.00
N/R
864,174
   
Series 2007, 5.500%, 1/01/37
     
1,655
 
Hawaii Department of Budget and Finance, Special Purpose Revenue Bonds, Hawaiian Electric
7/19 at 100.00
Baa1
1,877,780
   
Company, Inc. and Subsidiary Projects, Series 2009, 6.500%, 7/01/39
     
2,510
 
Total Hawaii
   
2,741,954
   
Idaho – 0.1% (0.1% of Total Investments)
     
500
 
Idaho Health Facilities Authority, Revenue Bonds, Saint Luke’s Health System Project, Tender
3/22 at 100.00
A–
697,040
   
Option Bond Trust 1102, 16.799%, 3/01/47 (IF) (6)
     
   
Illinois – 8.5% (7.4% of Total Investments)
     
915
 
Bolingbrook, Illinois, Sales Tax Revenue Bonds, Series 2005, 6.250%, 1/01/24
1/17 at 100.00
N/R
916,931
1,752
 
Chicago, Illinois, Certificates of Participation Tax Increment Bonds, 35th and State
No Opt. Call
N/R
1,762,806
   
Redevelopment Project, Series 2012, 6.100%, 1/15/29
     
2,665
 
Chicago, Illinois, Certificates of Participation, Tax Increment Allocation Revenue Bonds,
4/16 at 100.00
N/R
1,872,855
   
Diversey-Narragansett Project, Series 2006, 7.460%, 2/15/26
     
1,000
 
Chicago, Illinois, General Obligation Bonds, Project and Refunding Series 2005D, 5.500%, 1/01/37
1/25 at 100.00
BBB+
1,011,900
900
 
Chicago, Illinois, General Obligation Bonds, Project and Refunding Series 2014A, 5.250%, 1/01/30
1/24 at 100.00
BBB+
913,356
1,500
 
Chicago, Illinois, General Obligation Bonds, Variable Rate Demand Series 2007F, 5.500%, 1/01/42
1/25 at 100.00
BBB+
1,509,390
4,000
 
Cook County, Illinois, Recovery Zone Facility Revenue Bonds, Navistar International
10/20 at 100.00
Caa1
3,866,080
   
Corporation Project, Series 2010, 6.500%, 10/15/40
     
2,180
 
Evanston, Illinois, Educational Facility Revenue Bonds, Roycemore School Project, Series 2011,
7/21 at 100.00
N/R
2,270,601
   
8.250%, 7/01/41
     
3,370
 
Illinois Finance Authority, Charter School Revenue Bonds, Chicago Charter School Foundation,
12/16 at 100.00
BBB
3,397,499
   
Series 2007, 5.000%, 12/01/36
     
1,000
 
Illinois Finance Authority, Recovery Zone Facility Revenue Bonds, Navistar International
10/20 at 100.00
Caa1
966,520
   
Corporation Project, Series 2010, 6.500%, 10/15/40
     
   
Illinois Finance Authority, Revenue Bonds, Admiral at Lake Project, Series 2010A:
     
500
 
7.750%, 5/15/30
5/20 at 100.00
N/R
570,515
1,625
 
8.000%, 5/15/46
5/20 at 100.00
N/R
1,861,340
635
 
Illinois Finance Authority, Revenue Bonds, Christian Homes Inc., Refunding Series 2010,
3/16 at 100.00
BBB–
636,003
   
5.500%, 5/15/23
     
1,100
 
Illinois Finance Authority, Revenue Bonds, Elmhurst Memorial Healthcare, Series 2008A,
1/18 at 100.00
Baa2
1,174,481
   
5.625%, 1/01/37
     
1,000
 
Illinois Finance Authority, Revenue Bonds, Lake Forest College, Series 2012A, 6.000%, 10/01/48
10/22 at 100.00
BBB–
1,100,670
1,000
 
Illinois Finance Authority, Revenue Bonds, Montgomery Place Project, Series 2006A,
5/17 at 100.00
N/R
1,010,510
   
5.750%, 5/15/38
     
2,500
 
Illinois Finance Authority, Revenue Bonds, OSF Healthcare System, Tender Option Bond Trust 4702,
11/17 at 100.00
A (5)
3,393,700
   
20.104%, 11/15/37 (Pre-refunded 11/15/17) (IF) (6)
     
2,900
 
Illinois Finance Authority, Revenue Bonds, Provena Health, Series 2009A, 7.750%, 8/15/34
8/19 at 100.00
BBB+
3,512,712
1,770
 
Illinois Finance Authority, Revenue Bonds, Sherman Health Systems, Series 2007A, 5.500%,
8/17 at 100.00
N/R (5)
1,899,688
   
8/01/37 (Pre-refunded 8/01/17)
     
   
Illinois Finance Authority, Revenue Bonds, Silver Cross Hospital and Medical Centers, Series 2009:
     
2,000
 
6.875%, 8/15/38 (Pre-refunded 8/15/19)
8/19 at 100.00
N/R (5)
2,417,900
3,850
 
7.000%, 8/15/44 (Pre-refunded 8/15/19)
8/19 at 100.00
N/R (5)
4,671,244
   
Illinois Finance Authority, Revenue Bonds, The Carle Foundation, Tender Option Bond Trust
     
   
2015-XF0121:
     
250
 
21.477%, 2/15/19 – AGM Insured (IF) (6)
No Opt. Call
AA
441,560
1,685
 
21.461%, 2/15/35 – AGM Insured (IF) (6)
8/21 at 100.00
AA
2,975,154
6,020
 
Illinois Finance Authority, Student Housing Revenue Bonds, MJH Education Assistance Illinois
4/16 at 100.00
Caa2
5,417,699
   
IV LLC, Fullerton Village Project, Series 2004A, 5.125%, 6/01/35 (4)
     
200
 
Illinois State, General Obligation Bonds, Series 2012A, 5.000%, 3/01/36
3/22 at 100.00
A–
210,044
1,105
 
Lombard Public Facilities Corporation, Illinois, First Tier Conference Center and Hotel Revenue
4/16 at 100.00
N/R
518,234
   
Bonds, Series 2005A-1, 7.125%, 1/01/36 (11)
     
2,000
 
Lombard Public Facilities Corporation, Illinois, First Tier Conference Center and Hotel Revenue
4/16 at 100.00
CC
1,711,060
   
Bonds, Series 2005A-2, 5.500%, 1/01/36 – ACA Insured
     
   
Lombard Public Facilities Corporation, Illinois, Second Tier Conference Center and Hotel Revenue
     
   
Bonds, Series 2005B:
     
285
 
5.250%, 1/01/25 (12)
4/16 at 100.00
D
93,762
1,175
 
5.250%, 1/01/36 (12)
4/16 at 100.00
D
386,563
1,430
 
Lombard Public Facilities Corporation, Illinois, Third Tier Conference Center and Hotel Revenue
7/18 at 100.00
N/R
143
   
Bonds, Series 2005C-3, 12.000%, 1/01/36 (4)
     
800
 
Railsplitter Tobacco Settlement Authority, Illinois, Tobacco Settlement Revenue Bonds, Series
6/21 at 100.00
A–
963,728
   
2010, 6.000%, 6/01/28
     
980
 
Rantoul, Champaign County, Illinois, Tax Increment Revenue Bonds, Evans Road Series 2013B,
12/23 at 100.00
N/R
1,049,727
   
7.000%, 12/01/33
     
1,000
 
Southwestern Illinois Development Authority, Health Facility Revenue Bonds, Memorial Group,
11/23 at 100.00
AA
1,347,650
   
Inc., Series 2013, 7.125%, 11/01/43
     
750
 
Springfield, Sangamon County, Illinois, Special Service Area, Legacy Pointe, Special Assessment
3/17 at 102.00
N/R
780,577
   
Bonds, Series 2009, 7.875%, 3/01/32
     
953
 
Volo Village, Illinois, Special Service Area 3 Special Tax Bonds, Symphony Meadows Project 1,
3/16 at 102.00
N/R
962,606
   
Series 2006, 6.000%, 3/01/36 (Mandatory put 2/29/16)
     
895
 
Yorkville United City Business District, Illinois, Storm Water and Water Improvement Project
1/17 at 102.00
N/R
536,973
   
Revenue Bonds, Series 2007, 6.000%, 1/01/26 (13)
     
1,103
 
Yorkville, Illinois, Special Tax Bonds, Special Service Area 2005-108 Autumn Creek Project,
3/16 at 102.00
N/R
1,107,732
   
Series 2006, 6.000%, 3/01/36
     
58,793
 
Total Illinois
   
59,239,913
   
Indiana – 3.6% (3.1% of Total Investments)
     
5,600
 
Carmel Redevelopment District, Indiana, Tax Increment Revenue Bonds, Series 2004A,
7/16 at 100.00
N/R
5,640,264
   
6.650%, 1/15/24
     
1,000
 
Indiana Bond Bank, Special Program Bonds, Hendricks Regional Health Project, Tender Option
No Opt. Call
AA
2,089,620
   
Bond Trust 10-77W, 18.831%, 4/01/30 – AMBAC Insured (IF) (6)
     
1,250
 
Indiana Bond Bank, Special Program Gas Revenue Bonds, JP Morgan Ventures Energy Corporation
No Opt. Call
A
2,050,200
   
Guaranteed, Tender Option Bond Trust 2015-XF0115, 17.952%, 4/15/18 (IF) (6)
     
1,000
 
Indiana Finance Authority, Educational Facilities Revenue Bonds, Discovery Charter School Project,
12/25 at 100.00
N/R
1,005,470
   
Series 2015A, 7.250%, 12/01/45
     
1,000
 
Indiana Finance Authority, Environmental Improvement Revenue Bonds, United States Steel
No Opt. Call
B+
698,790
   
Corporation Project, Refunding Series 2011, 6.000%, 12/01/19
     
2,000
 
Indiana Finance Authority, Environmental Improvement Revenue Bonds, United States Steel
No Opt. Call
B+
1,165,700
   
Corporation Project, Series 2012, 5.750%, 8/01/42 (Alternative Minimum Tax)
     
500
 
Indiana Finance Authority, Hospital Revenue Bonds, King’s Daughters’ Hospital and Health
8/20 at 100.00
BBB+
545,730
   
Services, Series 2010, 5.500%, 8/15/45
     
   
Indiana Finance Authority, Revenue Bonds, Trinity Health Care Group Revenue Bonds, Tender
     
   
Option Bond Trust 2015-XF0106:
     
1,290
 
17.888%, 6/01/32 (IF) (6)
12/20 at 100.00
AA
1,896,816
1,250
 
18.882%, 12/01/32 (IF) (6)
12/19 at 100.00
AA
1,879,050
1,000
 
Indiana Health and Educational Facilities Financing Authority, Revenue Bonds, Ascension Health,
11/16 at 100.00
AA+
1,132,080
   
Tender Option Bond Trust 2015-XF0090, 18.047%, 5/15/33 (IF)
     
1,000
 
Shoals, Indiana, Exempt Facilities Revenue Bonds, National Gypsum Company Project, Series 2013,
11/23 at 100.00
N/R
1,125,620
   
7.250%, 11/01/43 (Alternative Minimum Tax)
     
1,000
 
St. Joseph County, Indiana, Economic Development Revenue Bonds, Chicago Trail Village
7/18 at 100.00
N/R
1,032,470
   
Apartments, Series 2005A, 7.500%, 7/01/35
     
   
Vigo County Hospital Authority, Indiana, Revenue Bonds, Union Hospital, Series 2007:
     
250
 
5.700%, 9/01/37
9/17 at 100.00
N/R
259,245
4,050
 
5.800%, 9/01/47
9/17 at 100.00
N/R
4,196,407
22,190
 
Total Indiana
   
24,717,462
   
Iowa – 1.2% (1.0% of Total Investments)
     
1,000
 
Iowa Finance Authority, Health Facility Revenue Bonds, Care Initiatives Project, Series 2006A,
7/16 at 100.00
BB+
1,010,880
   
5.500%, 7/01/25
     
995
 
Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Alcoa Inc. Project,
8/22 at 100.00
BBB–
1,007,716
   
Series 2012, 4.750%, 8/01/42
     
2,000
 
Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company
12/23 at 100.00
BB–
2,189,800
   
Project, Series 2013, 5.250%, 12/01/25
     
   
Iowa Tobacco Settlement Authority, Asset Backed Settlement Revenue Bonds, Series 2005C:
     
1,000
 
5.375%, 6/01/38
4/16 at 100.00
B+
971,560
2,865
 
5.625%, 6/01/46
4/16 at 100.00
B+
2,864,714
7,860
 
Total Iowa
   
8,044,670
   
Kansas – 0.3% (0.3% of Total Investments)
     
2,000
 
University of Kansas Hospital Authority, Health Facilities Revenue Bonds, KU Health System,
9/25 at 100.00
A+
2,287,200
   
Refunding & Improvement, Series 2015, 5.000%, 9/01/45 (UB) (6)
     
   
Kentucky – 0.2% (0.2% of Total Investments)
     
500
 
Kentucky Economic Development Finance Authority, Hospital Facilities Revenue Bonds, Owensboro
6/20 at 100.00
BBB+
574,735
   
Medical Health System, Series 2010A, 6.000%, 6/01/30
     
1,000
 
Kentucky Housing Corporation, Multifamily Housing Revenue Bonds, Heritage Green Apartments
5/25 at 100.00
N/R
1,018,320
   
Project, Series 2015, 5.625%, 5/01/45
     
1,500
 
Total Kentucky
   
1,593,055
   
Louisiana – 4.1% (3.6% of Total Investments)
     
2,350
 
Ascension Parish Industrial development Board, Louisiana, Revenue Bonds, Impala Warehousing
7/23 at 100.00
N/R
2,621,707
   
(US) LLC Project, Series 2013, 6.000%, 7/01/36
     
8,500
 
Louisiana Local Government Environmental Facilities & Community Development Authority,
11/17 at 100.00
BBB+
9,198,869
   
Revenue Bonds, Westlake Chemical Corporation Project, Series 2007, 6.750%, 11/01/32
     
915
 
Louisiana Local Government Environmental Facilities and Community Development Authority,
6/16 at 101.00
N/R (5)
943,319
   
Revenue Bonds, CDF Healthcare of Louisiana LLC, Series 2006A, 7.000%, 6/01/36
     
   
(Pre-refunded 6/01/16)
     
   
Louisiana Local Government Environmental Facilities and Community Development Authority,
     
   
Revenue Bonds, Southgate Suites Retail Project, Series 2007A:
     
7,000
 
6.750%, 12/15/37 (4)
12/17 at 100.00
N/R
4,501,910
1,115
 
6.000%, 12/15/37 (4)
4/16 at 100.00
N/R
612,380
100
 
Louisiana Local Government Environmental Facilities and Community Development Authority,
No Opt. Call
N/R
54,923
   
Revenue Bonds, Southgate Suites Retail Project, Series 2007B, 9.000%, 12/15/14
     
500
 
Louisiana Local Government Environmental Facilities and Community Development Authority,
11/20 at 100.00
BBB+
594,065
   
Revenue Bonds, Westlake Chemical Corporation Projects, Series 2010A-1, 6.500%, 11/01/35
     
   
Louisiana Local Government Environmental Facilities and Community Development Authority,
     
   
Revenue Bonds, Woman’s Hospital Foundation Project, Tender Option Bonds Trust 1012:
     
750
 
20.555%, 10/01/40 (IF) (6)
10/20 at 100.00
A
1,206,630
750
 
20.543%, 10/01/40 (IF) (6)
10/20 at 100.00
A
1,206,345
1,000
 
Louisiana Public Facilities Authority, Dock and Wharf Revenue Bonds, Impala Warehousing (US)
7/23 at 100.00
N/R
1,123,700
   
LLC Project, Series 2013, 6.500%, 7/01/36 (Alternative Minimum Tax)
     
2,000
 
Louisiana Public Facilities Authority, Revenue Bonds, Lake Charles Charter Academy Foundation
12/21 at 100.00
N/R
2,279,680
   
Project, Series 2011A, 7.750%, 12/15/31
     
2,110
 
Louisiana Public Facilities Authority, Revenue Bonds, Southwest Louisiana Charter Academy
12/23 at 100.00
N/R
2,514,571
   
Foundation Project, Series 2013A, 8.125%, 12/15/33
     
2,000
 
Louisiana Public Facilities Authority, Solid Waste Disposal Facility Revenue Bonds, Louisiana
No Opt. Call
N/R
1,624,880
   
Pellets Inc Project, Series 2015, 7.000%, 7/01/24 (Alternative Minimum Tax) (4)
     
29,090
 
Total Louisiana
   
28,482,979
   
Maine – 0.5% (0.4% of Total Investments)
     
3,155
 
Portland Housing Development Corporation, Maine, Section 8 Assisted Senior Living Revenue
4/16 at 100.00
Baa2
3,159,827
   
Bonds, Avesta Housing Development Corporation, Series 2004A, 6.000%, 2/01/34
     
   
Maryland – 1.1% (1.0% of Total Investments)
     
1,210
 
Baltimore, Maryland, Senior Lien Convention Center Hotel Revenue Bonds, Series 2006A, 5.250%,
9/16 at 100.00
Ba1
1,229,372
   
9/01/39 – SYNCORA GTY Insured
     
3,000
 
Maryland Economic Development Corporation, Port Facilities Revenue Bonds, CNX Marine
9/20 at 100.00
BB–
2,879,670
   
Terminals Inc. Port of Baltimore Facility, Refunding Series 2010, 5.750%, 9/01/25
     
4,000
 
Maryland Economic Development Corporation, Revenue Bonds, Chesapeake Bay Hyatt Conference
12/16 at 100.00
N/R
2,389,560
   
Center, Series 2006A, 5.000%, 12/01/31 (4)
     
2,500
 
Maryland Economic Development Corporation, Revenue Bonds, Chesapeake Bay Hyatt Conference
12/16 at 100.00
N/R
1,493,475
   
Center, Series 2006B, 5.250%, 12/01/31
     
10,710
 
Total Maryland
   
7,992,077
   
Massachusetts – 0.1% (0.1% of Total Investments)
     
90
 
Boston Industrial Development Financing Authority, Massachusetts, Senior Revenue Bonds,
4/16 at 100.00
Caa3
63,869
   
Crosstown Center Project, Series 2002, 6.500%, 9/01/35 (Alternative Minimum Tax)
     
419
 
Massachusetts Development Finance Agency, Revenue Bonds, Northern Berkshire Community
7/17 at 100.00
D
16,755
   
Services Inc., Series 2012A, 6.000%, 2/15/43 (4), (7)
     
333
 
Massachusetts Development Finance Agency, Revenue Bonds, Northern Berkshire Community
1/43 at 102.19
D
10,004
   
Services Inc., Series 2012B, 0.000%, 2/15/43 (4), (7)
     
475
 
Massachusetts Development Finance Agency, Revenue Bonds, Northern Berkshire Community
7/17 at 100.00
D
14,243
   
Services Inc., Series 2012C, 0.000%, 2/15/43 (4), (7)
     
480
 
Massachusetts Port Authority, Special Facilities Revenue Bonds, Delta Air Lines Inc., Series
7/16 at 100.00
N/R
481,507
   
2001A, 5.000%, 1/01/27 – AMBAC Insured (Alternative Minimum Tax)
     
1,797
 
Total Massachusetts
   
586,378
   
Michigan – 3.0% (2.6% of Total Investments)
     
   
Detroit Local Development Finance Authority, Michigan, Tax Increment Bonds, Series 1998A:
     
900
 
5.500%, 5/01/21
5/16 at 100.00
B–
886,113
10
 
5.500%, 5/01/21 – ACA Insured
4/16 at 100.00
B–
9,846
4,000
 
Detroit, Michigan, Distributable State Aid General Obligation Bonds, Limited Tax Series 2010,
11/20 at 100.00
AA
4,355,200
   
5.250%, 11/01/35
     
88
 
Detroit, Michigan, General Obligation Bonds, Series 2003A, 5.250%, 4/01/22
4/16 at 100.00
N/R
87,576
116
 
Detroit, Michigan, General Obligation Bonds, Series 2004A-1, 5.250%, 4/01/19 – AMBAC Insured
4/16 at 100.00
N/R
116,348
477
 
Michigan Finance Authority, Detroit, Michigan, Local Government Loan Program, Unlimited Tax
4/16 at 100.00
A–
477,468
   
General Obligation Bonds, Series 2014G-4A, 5.250%, 4/01/22 – SYNCORA GTY Insured
     
634
 
Michigan Finance Authority, Detroit, Michigan, Local Government Loan Program, Unlimited Tax
4/16 at 100.00
A–
634,282
   
General Obligation Bonds, Series 2014G-5A, 5.250%, 4/01/19 – AMBAC Insured
     
970
 
Michigan Finance Authority, Public School Academy Limited Obligation Revenue Bonds, Hope
4/21 at 100.00
BB–
850,418
   
Academy Project, Series 2011, 8.125%, 4/01/41
     
1,000
 
Michigan Finance Authority, Public School Academy Limited Obligation Revenue Bonds, Voyageur
7/21 at 100.00
B–
907,980
   
Academy Project, Series 2011, 8.000%, 7/15/41
     
1,670
 
Michigan Public Educational Facilities Authority, Charter School Revenue Bonds, American
12/17 at 100.00
N/R
1,700,127
   
Montessori Academy, Series 2007, 6.500%, 12/01/37
     
1,000
 
Michigan Public Educational Facilities Authority, Limited Obligation Revenue Bonds, Chandler
4/16 at 100.00
BBB
1,001,800
   
Park Academy Project, Series 2008, 6.500%, 11/01/35
     
1,000
 
Michigan Public Educational Facilities Authority, Limited Obligation Revenue Bonds, Richfield
9/17 at 100.00
BBB–
1,006,480
   
Public School Academy, Series 2007, 5.000%, 9/01/36
     
895
 
Michigan Public Educational Facilities Authority, Limited Obligation Revenue Bonds, David
6/17 at 100.00
N/R
899,368
   
Ellis Academy-West Charter School Project, Series 2007, 5.875%, 6/01/37
     
1,500
 
Michigan State Hospital Finance Authority, Revenue Bonds, Hills and Dales General Hospital,
11/17 at 100.00
N/R
1,532,085
   
Series 2005A, 6.750%, 11/15/38
     
970
 
Michigan Strategic Fund, Limited Obligation Revenue Bonds, Detroit Thermal LLC Project, Series
12/23 at 100.00
N/R
950,813
   
2013, 8.500%, 12/01/30 (Alternative Minimum Tax)
     
865
 
Michigan Strategic Fund, Solid Waste Facility Limited Obligation Revenue Bonds, Canton
No Opt. Call
N/R
900,733
   
Renewables, LLC Sauk Trail Hills Project, Series 2014, 6.750%, 7/01/22
     
   
(Alternative Minimum Tax)
     
1,000
 
Royal Oak Hospital Finance Authority, Michigan, Hospital Revenue Bonds, William Beaumont
9/18 at 100.00
Aaa
1,190,350
   
Hospital, Refunding Series 2009V, 8.250%, 9/01/39 (Pre-refunded 9/01/18)
     
   
Summit Academy North, Michigan, Revenue Bonds, Public School Academy Series 2005:
     
1,000
 
5.500%, 11/01/30
4/16 at 100.00
BB
1,000,280
500
 
5.500%, 11/01/35
4/16 at 100.00
BB
500,060
500
 
Summit Academy, Michigan, Revenue Bonds, Public School Academy Series 2005, 6.375%, 11/01/35
4/16 at 100.00
BB
500,460
1,200
 
University of Michigan, General Revenue Bonds, Series 2015, 5.000%, 4/01/46 (UB) (6)
4/26 at 100.00
AAA
1,429,896
20,295
 
Total Michigan
   
20,937,683
   
Minnesota – 0.4% (0.3% of Total Investments)
     
665
 
Brooklyn Park, Minnesota, Charter School Lease Revenue Bonds, Athlos Leadership Academy
7/25 at 100.00
N/R
679,683
   
Project, Series 2015A, 5.500%, 7/01/35
     
1,000
 
Columbus, Minnesota, Charter School Lease Revenue Bonds, New Millennium Academy Project,
7/25 at 100.00
BB
1,017,210
   
Series 2015A, 6.000%, 7/01/45
     
1,000
 
Saint Paul Port Authority, Minnesota, Solid Waste Disposal Revenue Bonds, Gerdau Saint Paul
10/22 at 100.00
BBB–
924,750
   
Steel Mill Project, Series 2012-7, 4.500%, 10/01/37 (Alternative Minimum Tax)
     
2,665
 
Total Minnesota
   
2,621,643
   
Mississippi – 0.3% (0.2% of Total Investments)
     
728
 
Mississippi Home Corporation, Multifamily Housing Revenue Bonds, Tupelo Personal Care
10/19 at 101.00
N/R
739,224
   
Apartments, Series 2004-2, 6.125%, 9/01/34 (Alternative Minimum Tax)
     
1,000
 
Warren County, Mississippi, Gulf Opportunity Zone Revenue Bonds, International Paper Company
9/18 at 100.00
BBB
1,124,300
   
Project, Series 2008A, 6.500%, 9/01/32
     
1,728
 
Total Mississippi
   
1,863,524
   
Missouri – 2.3% (2.0% of Total Investments)
     
1,000
 
Hanley Road Corridor Transportation Development District, Brentwood and Maplewood, Missouri,
10/19 at 100.00
A–
1,118,240
   
Transportation Sales Revenue Bonds, Refunding Series 2009A, 5.875%, 10/01/36
     
2,000
 
Joplin Industrial Development Authority, Missouri, Tax Increment Revenue Bonds, Joplin Recovery
4/23 at 100.00
N/R
2,145,740
   
TIF Redevelopment Project, Series 2013B, 5.875%, 4/01/36
     
2,000
 
Liberty, Missouri, Special Obligation Tax Increment and Special Districts Bonds, Liberty Commons
6/25 at 100.00
N/R
2,041,420
   
Project, Subordinate Lien Series 2015B, 8.500%, 6/15/46
     
5,935
 
Missouri Environmental Improvement and Energy Resources Authority, Water Facility Revenue
12/16 at 100.00
AA+
6,024,737
   
Bonds, Missouri-American Water Company, Series 2006, 4.600%, 12/01/36 – AMBAC
     
   
Insured (Alternative Minimum Tax) (UB) (6)
     
1,100
 
Saint Louis Industrial Development Authority, Missouri, Confluence Academy Project, Series
6/18 at 100.00
N/R
1,103,916
   
2007A, 5.350%, 6/15/32
     
970
 
Saint Louis Land Clearance for Redevelopment Authority, Missouri, Tax-Exempt Recovery Zone
9/20 at 100.00
N/R
1,013,194
   
Facilities Improvement, Special Revenue Bonds, Kiel Opera House Project, Series 2010B,
     
   
7.000%, 9/01/35
     
1,640
 
Saint Louis, Missouri, Tax Increment Financing Revenue Bonds, Fashion Square Redevelopment
9/16 at 100.00
N/R
1,611,448
   
Project, Series 2008A, 6.300%, 8/22/26
     
732
 
Saint Louis, Missouri, Tax Increment Financing Revenue Bonds, Grace Lofts Redevelopment
6/16 at 100.00
N/R
698,218
   
Projects, Series 2007A, 6.000%, 3/27/26
     
15,377
 
Total Missouri
   
15,756,913
   
Nebraska – 1.5% (1.3% of Total Investments)
     
6,485
 
Omaha Public Power District, Nebraska, Separate Electric System Revenue Bonds, Nebraska City 2,
2/17 at 100.00
AA+ (5)
10,615,880
   
Tender Option Bond Trust 11673, 20.228%, 8/01/40 (Pre-refunded 2/01/17) – BHAC Insured (IF)
     
   
Nevada – 0.9% (0.8% of Total Investments)
     
2,500
 
Clark County, Nevada, General Obligation Bank Bonds, Southern Nevada Water Authority Loan,
No Opt. Call
Aa1
3,347,700
   
Tender Option Bond Trust Series 2010-11836, 18.185%, 6/01/16 (IF)
     
500
 
Henderson, Nevada, Limited Obligation Bonds, Local Improvement District T-18, Inspirada Series
9/16 at 100.00
N/R
496,485
   
2006, 5.125%, 9/01/19
     
   
Sparks Tourism Improvement District 1, Legends at Sparks Marina, Nevada, Senior Sales Tax
     
   
Revenue Bonds Series 2008A:
     
660
 
6.500%, 6/15/20
6/18 at 100.00
B1
706,180
1,500
 
6.750%, 6/15/28
6/18 at 100.00
B1
1,602,810
5,160
 
Total Nevada
   
6,153,175
   
New Jersey – 2.3% (2.0% of Total Investments)
     
2,100
 
New Jersey Economic Development Authority, Special Facilities Revenue Bonds, Continental
9/22 at 101.00
BB–
2,312,205
   
Airlines Inc., Series 1999, 5.250%, 9/15/29 (Alternative Minimum Tax)
     
1,080
 
New Jersey Economic Development Authority, Special Facilities Revenue Bonds, Continental
3/24 at 101.00
BB–
1,228,284
   
Airlines Inc., Series 2000A & 2000B, 5.625%, 11/15/30 (Alternative Minimum Tax)
     
1,000
 
New Jersey Economic Development Authority, Student Housing Revenue Bonds, Provident
6/20 at 100.00
Baa3
1,116,750
   
Group-Montclair Properties LLC, Montclair State University Student Housing Project, Series
     
   
2010A, 5.875%, 6/01/42
     
600
 
New Jersey Educational Facilities Authority, Revenue Bonds, University of Medicine and Dentistry
6/19 at 100.00
N/R (5)
726,858
   
of New Jersey, Refunding Series 2009B, 7.500%, 12/01/32 (Pre-refunded 6/01/19)
     
5,200
 
New Jersey Health Care Facilities Financing Authority, New Jersey, Revenue Bonds, Saint Peters
7/18 at 100.00
BB+
5,397,548
   
University Hospital, Series 2007, 5.750%, 7/01/37
     
   
New Jersey Health Care Facilities Financing Authority, Revenue Bonds, Saint Joseph’s
     
   
Healthcare System Obligated Group Issue, Series 2008:
     
1,000
 
6.000%, 7/01/18
No Opt. Call
BBB–
1,049,350
2,000
 
6.625%, 7/01/38
7/18 at 100.00
BBB–
2,210,600
740
 
New Jersey Higher Education Assistance Authority, Student Loan Revenue Bonds, Series 2008A,
6/18 at 100.00
AA
800,118
   
6.125%, 6/01/30 – AGC Insured (Alternative Minimum Tax)
     
1,000
 
Tobacco Settlement Financing Corporation, New Jersey, Tobacco Settlement Asset-Backed Bonds,
6/17 at 100.00
B–
840,740
   
Series 2007-1A, 5.000%, 6/01/41
     
14,720
 
Total New Jersey
   
15,682,453
   
New Mexico – 0.9% (0.8% of Total Investments)
     
395
 
Mariposa East Public Improvement District, New Mexico, Revenue Bonds, Capital Appreciation
3/16 at 44.27
N/R
47,357
   
Taxable Series 2015D, 0.000%, 9/01/32
     
75
 
Mariposa East Public Improvement District, New Mexico, Special Levy Revenue Bonds, Series
9/25 at 100.00
N/R
76,043
   
2015A, 5.900%, 9/01/32
     
330
 
Mariposa East Public Improvement District, New Mexico, Special Levy Revenue Bonds, Series
9/25 at 100.00
N/R
304,214
   
2015B, 5.900%, 9/01/32
     
435
 
Mariposa East Public Improvement District, New Mexico, Special Levy Revenue Bonds, Series
9/25 at 100.00
N/R
377,689
   
2015C, 5.900%, 9/01/32
     
1,210
 
Mesa Del Sol Public Improvement District 1, Albuquerque, New Mexico, Special Levy Revenue
10/23 at 100.00
N/R
1,307,720
   
Bonds, Series 2013, 7.250%, 10/01/43
     
450
 
Montecito Estates Public Improvement District, New Mexico, Special Levee Revenue Bonds, Series
10/17 at 100.00
N/R
461,007
   
2007, 7.000%, 10/01/37
     
965
 
New Mexico Hospital Equipment Loan Council, First Mortgage Revenue Bonds, La Vida LLena
7/20 at 100.00
BBB–
1,033,399
   
Project, Series 2010A, 5.875%, 7/01/30
     
1,020
 
Volterra Public Improvement District, Albuquerque, New Mexico, Special Levy Revenue Bonds,
No Opt. Call
N/R
1,099,897
   
Series 2014, 6.750%, 10/01/33
     
1,575
 
Winrock Town Center Tax Increment Development District, Albuquerque, New Mexico, Gross
5/20 at 103.00
N/R
1,673,091
   
Receipts Tax Increment Bonds, Senior Lien Series 2015, 6.000%, 5/01/40
     
6,455
 
Total New Mexico
   
6,380,417
   
New York – 3.4% (3.0% of Total Investments)
     
1,000
 
Brooklyn Arena Local Development Corporation, New York, Payment in Lieu of Taxes Revenue
1/20 at 100.00
BBB–
1,165,180
   
Bonds, Barclays Center Project, Series 2009, 6.375%, 7/15/43
     
500
 
Build NYC Resource Corporation, New York, Revenue Bonds, Albert Einstein College of Medicine,
9/25 at 100.00
N/R
540,960
   
Inc., Series 2015, 5.500%, 9/01/45
     
   
New York City Industrial Development Agency, New York, American Airlines-JFK International
     
   
Airport Special Facility Revenue Bonds, Series 2005:
     
485
 
7.500%, 8/01/16 (Alternative Minimum Tax)
No Opt. Call
N/R
500,379
1,000
 
7.625%, 8/01/25 (Alternative Minimum Tax)
8/16 at 101.00
N/R
1,042,280
1,000
 
8.000%, 8/01/28 (Alternative Minimum Tax)
8/16 at 101.00
N/R
1,044,160
1,000
 
7.750%, 8/01/31 (Alternative Minimum Tax)
8/16 at 101.00
N/R
1,042,910
   
New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, Bronx
     
   
Parking Development Company, LLC Project, Series 2007:
     
1,500
 
5.750%, 10/01/37 (14)
10/17 at 100.00
N/R
532,500
5,000
 
5.875%, 10/01/46 (15)
10/17 at 102.00
N/R
1,775,000
650
 
New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, Special
7/16 at 101.00
N/R
650,416
   
Needs Facilities Pooled Program, Series 2008A-1, 5.800%, 7/01/23
     
380
 
New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, Special
7/16 at 101.00
N/R (5)
392,646
   
Needs Facilities Pooled Program, Series 2008A-1, 5.800%, 7/01/23 (Pre-refunded 7/01/16)
     
500
 
New York Liberty Development Corporation, Liberty Revenue Bonds, Secured by Port Authority
12/21 at 100.00
AA–
776,380
   
Consolidated Bonds, Tender Option Bonds Trust 1190, 18.160%, 12/15/41 (IF) (6)
     
3,250
 
New York Liberty Development Corporation, New York, Liberty Revenue Bonds, 3 World Trade
11/24 at 100.00
N/R
3,452,768
   
Center Project, Class 2 Series 2014, 5.150%, 11/15/34
     
6,000
 
New York Liberty Development Corporation, New York, Liberty Revenue Bonds, 3 World Trade
11/24 at 100.00
N/R
7,299,000
   
Center Project, Class 3 Series 2014, 7.250%, 11/15/44
     
1,375
 
New York Liberty Development Corporation, New York, Liberty Revenue Bonds, Bank of America
1/20 at 100.00
A–
1,555,318
   
Tower at One Bryant Park Project, Second Priority Refunding Series 2010, 6.375%, 7/15/49
     
   
New York Liberty Development Corporation, Second Priority Liberty Revenue Refunding Bonds,
     
   
Bank of America Tower at One Bryant Park Project, Tender Option Bond Trust PT4704:
     
250
 
18.731%, 1/15/44 (IF) (6)
1/20 at 100.00
AA+
362,780
625
 
18.731%, 1/15/44 (IF) (6)
1/20 at 100.00
AA+
906,950
530
 
Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air Terminal
12/20 at 100.00
BBB
619,241
   
LLC Project, Eighth Series 2010, 6.000%, 12/01/42
     
25,045
 
Total New York
   
23,658,868
   
North Carolina – 0.9% (0.8% of Total Investments)
     
940
 
Charlotte-Mecklenburg Hospital Authority, North Carolina, Health Care Revenue Bonds, DBA
No Opt. Call
AA–
1,461,850
   
Carolinas HealthCare System, Tender Option Bond Trust 11963, 19.374%, 1/15/19 (IF)
     
1,000
 
Gaston County Industrial Facilities and Pollution Control Financing Authority, North Carolina,
4/16 at 100.00
N/R
1,001,960
   
National Gypsum Company Project Exempt Facilities Revenue Bonds, Series 2005, 5.750%,
     
   
8/01/35 (Alternative Minimum Tax)
     
   
North Carolina Capital Facilities Financing Agency, Educational Facilities Revenue Bond,
     
   
Meredith College, Series 2008A:
     
1,000
 
6.000%, 6/01/31
6/18 at 100.00
BBB
1,074,740
1,000
 
6.125%, 6/01/35
6/18 at 100.00
BBB
1,071,670
960
 
North Carolina Capital Facilities Financing Agency, Revenue Bonds, Duke University, Series
10/16 at 100.00
AA+
1,608,106
   
2008, Tender Option Bond Trust 2015-XF0095, 27.015%, 10/01/36 (IF)
     
4,900
 
Total North Carolina
   
6,218,326
   
North Dakota – 0.3% (0.2% of Total Investments)
     
2,000
 
Williston, North Dakota, Multifamily Housing Revenue Bonds, Eagle Crest Apartments LLC Project,
9/23 at 100.00
N/R
1,857,740
   
Series 2013, 7.750%, 9/01/38
     
   
Ohio – 4.7% (4.1% of Total Investments)
     
   
Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue
     
   
Bonds, Senior Lien, Series 2007A-2:
     
5,500
 
5.875%, 6/01/30
6/17 at 100.00
B–
4,960,670
5,875
 
5.750%, 6/01/34
6/17 at 100.00
B–
5,207,541
1,005
 
6.500%, 6/01/47
6/17 at 100.00
B
958,388
6,000
 
5.875%, 6/01/47
6/17 at 100.00
B
5,315,160
3,455
 
Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue
6/22 at 100.00
B–
3,214,739
   
Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37
     
1,500
 
Butler County Port Authority, Ohio, Public Infrastructure Revenue Bonds, Liberty Center Project,
12/22 at 100.00
N/R
1,530,150
   
Liberty Community Authority, Series 2014C, 6.000%, 12/01/43
     
1,870
 
Cleveland-Cuyahoga County Port Authority, Ohio, Development Revenue Bonds, Bond Fund
5/16 at 100.00
BBB+
1,872,468
   
Program – Garfield Heights Project, Series 2004D, 5.250%, 5/15/23
     
2,000
 
Lorain County Port Authority, Ohio, Recovery Zone Facility Economic Development Revenue Bonds,
12/20 at 100.00
B+
1,205,220
   
United State Steel Corporation Project, Series 2010, 6.750%, 12/01/40
     
1,270
 
Medina County Port Authority, Ohio, Development Revenue Bond, Fiber Network Project, Series
12/20 at 100.00
A+
1,478,966
   
2010B, 6.000%, 12/01/30
     
1,250
 
Ohio State, Hospital Facility Revenue Refunding Bonds, Cleveland Clinic Health System Obligated
No Opt. Call
Aa2
1,894,800
   
Group, Tender Option Bond Trust 2015-XF0105, 20.047%, 1/01/17 (IF)
     
3,000
 
State of Ohio, Solid Waste Disposal Revenue Bonds (USG Corporation Project) Series 1997
2/16 at 100.00
B
3,000,720
   
Remarketed, 5.600%, 8/01/32 (Alternative Minimum Tax)
     
2,000
 
Tuscarawas County Economic Development and Finance Alliance, Ohio, Higher Education Facilities
3/25 at 100.00
N/R
2,043,400
   
Revenue Bonds, Ashland University, Refunding & Improvement Series 2015, 6.000%, 3/01/45
     
6,000
 
Western Reserve Port Authority, Ohio, Solid Waste Facility Revenue Bonds, Central Waste Inc.,
7/17 at 102.00
N/R
29,520
   
Series 2007A, 6.350%, 7/01/27 (Alternative Minimum Tax) (4)
     
40,725
 
Total Ohio
   
32,711,742
   
Oklahoma – 0.3% (0.3% of Total Investments)
     
2,000
 
Fort Sill Apache Tribe of Oklahoma Economic Development Authority, Gaming Enterprise Revenue
8/21 at 100.00
N/R
2,359,660
   
Bonds, Fort Sill Apache Casino, Series 2011A, 8.500%, 8/25/26
     
   
Pennsylvania – 2.9% (2.5% of Total Investments)
     
   
Allegheny Country Industrial Development Authority, Pennsylvania, Environmental Improvement
     
   
Revenue Bonds, United States Steel Corporation Project, Refunding Series 2009:
     
500
 
6.750%, 11/01/24
11/19 at 100.00
B+
300,855
2,000
 
6.875%, 5/01/30
11/19 at 100.00
B+
1,204,340
860
 
Berks County Industrial Development Authority, Pennsylvania, First Mortgage Revenue Bonds, One
11/17 at 101.00
N/R
875,463
   
Douglassville Properties Project, Series 2007A, 6.125%, 11/01/34 (Alternative Minimum Tax)
     
2,000
 
Chester County Health and Education Facilities Authority, Pennsylvania, Revenue Bonds,
4/16 at 100.00
N/R
2,041,960
   
Immaculata University, Series 2005, 5.750%, 10/15/37
     
1,410
 
Chester County Industrial Development Authority, Pennsylvania, Avon Grove Charter School
12/17 at 100.00
BBB–
1,494,360
   
Revenue Bonds, Series 2007A, 6.375%, 12/15/37
     
185
 
Montgomery County Industrial Development Authority, Pennsylvania, FHA Insured Mortgage
8/20 at 100.00
N/R (5)
327,753
   
Revenue Bonds, New Regional Medical Center Project, Tender Option Bond Trust 62B, 19.696%,
     
   
8/01/38 (Pre-refunded 8/01/20) (IF) (6)
     
4,115
 
Pennsylvania Economic Development Finance Authority, Solid Waste Disposal Revenue Bonds (USG
6/16 at 100.00
B
4,115,864
   
Corporation Project) Series 1999, 6.000%, 6/01/31 (Alternative Minimum Tax)
     
4,250
 
Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Refunding
9/25 at 100.00
B+
4,497,095
   
Bonds, PPL Energy Supply, LLC Project, Series 2009A, 6.400%, 12/01/38
     
2,500
 
Philadelphia Authority for Industrial Development, Pennsylvania, Revenue Bonds, Nueva Esperanza,
1/23 at 100.00
N/R
2,874,125
   
Inc. – Esperanza Academy Charter School, Series 2013, 8.000%, 1/01/33
     
510
 
Philadelphia Hospitals and Higher Education Facilities Authority, Pennsylvania, Hospital Revenue
No Opt. Call
BBB–
555,910
   
Bonds, Temple University Health System Obligated Group, Series 2012A, 5.625%, 7/01/36
     
1,000
 
Philadelphia Hospitals and Higher Education Facilities Authority, Pennsylvania, Hospital Revenue
No Opt. Call
BBB–
1,049,180
   
Bonds, Temple University Health System Obligated Group, Series 2012B, 6.250%, 7/01/23
     
770
 
Scranton, Pennsylvania, General Obligation Bonds, Series 2012A, 8.500%, 9/01/22
No Opt. Call
N/R
811,903
20,100
 
Total Pennsylvania
   
20,148,808
   
Rhode Island – 0.3% (0.3% of Total Investments)
     
1,000
 
Rhode Island Health & Educational Building Corporation, Health Facilities Revenue Bonds,
1/21 at 100.00
N/R
1,188,260
   
Tockwotton Home, Series 2011, 8.375%, 1/01/46
     
1,000
 
Rhode Island Student Loan Authority, Student Loan Program Revenue Bonds, Series 2008A,
12/17 at 100.00
AA
1,063,360
   
6.750%, 12/01/28 (Alternative Minimum Tax)
     
2,000
 
Total Rhode Island
   
2,251,620
   
South Carolina – 0.7% (0.6% of Total Investments)
     
4,000
 
Lancaster County, South Carolina, Special Assessment Bonds, Edgewater II Improvement District,
11/17 at 100.00
N/R
1,200,080
   
Series 2007A, 7.750%, 11/01/39 (4)
     
3,477
 
Lancaster County, South Carolina, Special Assessment Bonds, Edgewater II Improvement District,
No Opt. Call
N/R
1,043,170
   
Series 2007B, 7.700%, 11/01/17 (4)
     
1,000
 
South Carolina JOBS Economic Development Authority, Economic Development Revenue Bonds,
11/24 at 100.00
N/R
1,097,230
   
Midland Valley Preparatory School Project, Series 2014, 7.750%, 11/15/45
     
1,250
 
South Carolina Jobs-Economic Development Authority, Hospital Revenue Bonds, Palmetto Health,
8/21 at 100.00
AA
1,530,175
   
Refunding Series 2011A, 6.500%, 8/01/39 – AGM Insured
     
9,727
 
Total South Carolina
   
4,870,655
   
Tennessee – 1.6% (1.4% of Total Investments)
     
3,000
 
Johnson City Health and Educational Facilities Board, Tennessee, Hospital Revenue Bonds,
7/20 at 100.00
BBB+
3,480,930
   
Mountain States Health Alliance, Refunding Series 2010A, 6.500%, 7/01/38
     
6,024
 
The Tennessee Energy Acquisition Corporation, Gas Revenue Bonds, Series 2006B, 5.625%, 9/01/26
No Opt. Call
BBB
7,040,731
965
 
Wilson County Health and Educational Facilities Board, Tennessee, Senior Living Revenue Bonds,
No Opt. Call
N/R
922,743
   
Rutland Place Inc. Project, Series 2015A, 6.300%, 1/01/46
     
9,989
 
Total Tennessee
   
11,444,404
   
Texas – 6.2% (5.4% of Total Investments)
     
2,000
 
Austin Convention Enterprises Inc., Texas, Convention Center Hotel Revenue Bonds, Second Tier
1/17 at 100.00
BB
2,049,980
   
Series 2006B, 5.750%, 1/01/34
     
50
 
Austin Convention Enterprises Inc., Texas, Convention Center Hotel Revenue Bonds, Third Tier
7/16 at 100.00
N/R
50,632
   
Series 2001C, 9.750%, 1/01/26
     
4,005
 
Brazos River Authority, Texas, Pollution Control Revenue Refunding Bonds, TXU Electric Company,
7/18 at 100.00
N/R
119,750
   
Series 2001D, 8.250%, 5/01/33 (Alternative Minimum Tax) (4)
     
1,000
 
Celina, Texas, Special Assessment Revenue Bonds, Creeks of Legacy Public Improvement District
9/22 at 103.00
N/R
1,039,610
   
Phase 1 Project, Series 2014, 7.000%, 9/01/40
     
   
Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2011:
     
1,000
 
6.750%, 1/01/41
1/21 at 100.00
BBB
1,196,170
250
 
6.000%, 1/01/41
1/21 at 100.00
BBB+
287,285
   
Clifton Higher Education Finance Corporation, Texas, Education Revenue Bonds, Tejano Center
     
   
for Community Concerns, Inc.-Raul Yzaguirre School for Success, Refunding Series 2009A:
     
2,100
 
8.750%, 2/15/28
2/18 at 100.00
B+
2,221,464
2,000
 
9.000%, 2/15/38
2/18 at 100.00
B+
2,118,460
2,910
 
Danbury Higher Education Authority Inc., Texas, Golden Rule Charter School Revenue Bonds,
2/18 at 100.00
BBB– (5)
3,216,947
   
Series 2008A, 6.500%, 8/15/38 (Pre-refunded 2/15/18)
     
   
Decatur Hospital Authority, Texas, Revenue Bonds, Wise Regional Health System, Series 2013A:
     
450
 
6.625%, 9/01/31
9/23 at 100.00
N/R
549,369
1,000
 
6.375%, 9/01/42
9/23 at 100.00
N/R
1,179,240
1,500
 
Fort Bend County Industrial Development Corporation, Texas, Revenue Bonds, NRG Energy Inc.
11/22 at 100.00
Baa3
1,515,435
   
Project, Series 2012A. RMKT, 4.750%, 5/01/38
     
585
 
Gulf Coast Industrial Development Authority, Texas, Solid Waste Disposal Revenue Bonds, Citgo
4/16 at 100.00
BB+
586,223
   
Petroleum Corporation Project, Series 1998, 8.000%, 4/01/28 (Alternative Minimum Tax)
     
915
 
Heart of Texas Education Finance Corporation, Texas, Gateway Charter Academy, Series 2006A,
8/16 at 100.00
N/R
934,023
   
6.000%, 2/15/36
     
3,875
 
Jefferson County Industrial Development Corporation, Texas, Hurricane Ike Disaster Area Revenue
7/22 at 100.00
N/R
4,139,934
   
Bonds, Port of Beaumont Petroleum Transload Terminal, LLC Project, Series 2012,
     
   
8.250%, 7/01/32
     
1,330
 
La Vernia Higher Education Financing Corporation, Texas, Education Revenue Bonds, Amigos Por
2/16 at 100.00
N/R
1,331,742
   
Vida Friends For Life Public Charter School, Series 2008, 6.375%, 2/15/37
     
2,000
 
Mission Economic Development Corporation, Texas, Water Supply Revenue Bonds, Enviro Water
1/26 at 102.00
N/R
2,023,060
   
Minerals Project, Green Bonds, Series 2015, 7.750%, 1/01/45 (Alternative Minimum Tax)
     
1,000
 
New Hope Cultural Education Facilities Finance Corporation, Texas, Student Housing Revenue
No Opt. Call
BBB–
1,055,190
   
Bonds, CHF-Collegiate Housing Corpus Christi I, L.L.C.-Texas A&M University-Corpus Christi
     
   
Project, Series 2014A, 5.000%, 4/01/44
     
2,250
 
North Texas Tollway Authority, Special Projects System Revenue Bonds, Tender Option Bond Trust
No Opt. Call
AA+
3,918,150
   
11946, 20.382%, 3/01/19 (IF)
     
335
 
North Texas Tollway Authority, System Revenue Bonds, Refunding Second Tier, Series 2008F,
1/18 at 100.00
A2 (5)
367,140
   
5.750%, 1/01/38 (Pre-refunded 1/01/18)
     
2,000
 
Red River Health Facilities Development Corporation, Texas, First Mortgage Revenue Bonds, Eden
No Opt. Call
N/R
1,771,980
   
Home Inc., Series 2012, 7.000%, 12/15/32 (4)
     
2,000
 
Sabine River Authority, Texas, Pollution Control Revenue Refunding Bonds, TXU Energy Company
8/22 at 100.00
C
59,800
   
LLC Project, Series 2003B, 6.150%, 8/01/22 (4)
     
2,810
 
Texas Private Activity Bond Surface Transportation Corporation, Revenue Bonds, NTE Mobility
12/19 at 100.00
Baa2
3,315,154
   
Partners LLC North Tarrant Express Managed Lanes Project, Senior Lien Series 2009,
     
   
6.875%, 12/31/39
     
   
Texas Private Activity Bond Surface Transportation Corporation, Senior Lien Revenue Bonds, LBJ
     
   
Infrastructure Group LLC IH-635 Managed Lanes Project, Series 2010:
     
1,000
 
7.000%, 6/30/34
6/20 at 100.00
Baa3
1,219,460
4,500
 
7.000%, 6/30/40
6/20 at 100.00
Baa3
5,443,245
880
 
Texas Public Finance Authority Charter School Finance Corporation, Charter School Revenue
4/16 at 100.00
BB
866,334
   
Bonds, School of Excellence Education Project, Series 2004A, 7.000%, 12/01/34
     
550
 
Travis County Health Facilities Development Corporation, Texas, Revenue Bonds, Westminster
11/20 at 100.00
BBB–
638,589
   
Manor, Series 2010, 7.000%, 11/01/30
     
340
 
Trinity River Authority of Texas, Pollution Control Revenue Refunding Bonds, TXU Electric Company,
4/16 at 100.00
C
10,166
   
Series 2003, 6.250%, 5/01/28 (Alternative Minimum Tax) (4)
     
44,635
 
Total Texas
   
43,224,532
   
Utah – 1.8% (1.6% of Total Investments)
     
   
Utah State Charter School Finance Authority, Charter School Revenue Bonds, Noah Webster
     
   
Academy, Series 2008A:
     
1,265
 
6.250%, 6/15/28
6/17 at 100.00
N/R
1,295,537
1,430
 
6.500%, 6/15/38
6/17 at 100.00
N/R
1,460,974
1,690
 
Utah State Charter School Finance Authority, Charter School Revenue Bonds, North Davis
7/20 at 100.00
BBB–
1,860,453
   
Preparatory Academy, Series 2010, 6.375%, 7/15/40
     
1,980
 
Utah State Charter School Finance Authority, Charter School Revenue Bonds, Summit Academy
5/21 at 100.00
N/R
2,257,081
   
High School, Series 2011A, 8.125%, 5/15/31
     
5,550
 
Utah State Charter School Finance Authority, Revenue Bonds, Summit Academy Project, Series
12/17 at 100.00
BBB–
5,709,674
   
2007A, 5.800%, 6/15/38
     
11,915
 
Total Utah
   
12,583,719
   
Vermont – 0.2% (0.2% of Total Investments)
     
1,155
 
Vermont Educational and Health Buildings Financing Agency, Revenue Bonds, Vermont Law School
1/21 at 100.00
N/R
1,203,706
   
Project, Series 2011A, 6.250%, 1/01/41
     
   
Virgin Islands – 0.1% (0.1% of Total Investments)
     
420
 
Virgin Islands Public Finance Authority, Matching Fund Revenue Loan Note – Diageo Project, Series
10/19 at 100.00
Baa3
474,218
   
2009A, 6.750%, 10/01/37
     
   
Virginia – 0.8% (0.7% of Total Investments)
     
789
 
Celebrate Virginia North Community Development Authority, Special Assessment Revenue Bonds,
3/16 at 100.00
N/R
509,371
   
Series 2003B, 6.250%, 3/01/18 (16)
     
1,000
 
Giles County Industrial Development Authority, Virginia, Exempt Facility Revenue Bonds, Hoechst
3/16 at 100.00
BB–
1,003,500
   
Celanese Project, Series 1996, 6.450%, 5/01/26
     
9,400
 
Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Second Senior Lien Revenue
No Opt. Call
BBB+
3,674,178
   
Bonds, Series 2009B, 0.000%, 10/01/38 – AGC Insured
     
   
Virginia Small Business Financing Authority, Senior Lien Revenue Bonds, Elizabeth River Crossing,
     
   
Opco LLC Project, Series 2012:
     
100
 
6.000%, 1/01/37 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
115,884
130
 
5.500%, 1/01/42 (Alternative Minimum Tax)
7/22 at 100.00
BBB–
144,834
11,419
 
Total Virginia
   
5,447,767
   
Washington – 3.0% (2.6% of Total Investments)
     
500
 
FYI Properties, Washington, Lease Revenue Bonds, Washington State Department of Information
6/19 at 100.00
AA
749,460
   
Services Project, Tender Option Bond Trust 11-14W-B, 19.483%, 6/01/39 (IF) (6)
     
2,415
 
FYI Properties, Washington, Lease Revenue Bonds, Washington State Department of Information
6/19 at 100.00
AA
3,653,509
   
Services Project, Tender Option Bond Trust 2009-14A&B, 19.483%, 6/01/34 (IF) (6)
     
3,600
 
Kalispel Indian Tribe, Washington, Priority Distribution Bonds, Series 2008, 6.750%, 1/01/38
1/18 at 100.00
N/R
3,726,000
1,000
 
King County Public Hospital District 4, Washington, Hospital Revenue Bonds, Snoqualmie Valley
No Opt. Call
N/R
1,014,570
   
Hospital, Series 2015A, 6.250%, 12/01/45
     
1,000
 
Kitsap County Consolidated Housing Authority, Washington, Pooled Tax Credit Housing Revenue
6/17 at 100.00
N/R
1,016,940
   
Bonds, Series 2007, 5.600%, 6/01/37 (Alternative Minimum Tax)
     
370
 
Tacoma Consolidated Local Improvement District 65, Washington, Special Assessment Bonds,
4/17 at 100.00
N/R
370,015
   
Series 2013, 5.750%, 4/01/43
     
9,000
 
Washington State Health Care Facilities Authority, Revenue Bonds, Northwest Hospital and
12/17 at 100.00
N/R (5)
9,263,250
   
Medical Center of Seattle, Series 2007, 5.700%, 12/01/32 (Pre-refunded 12/04/17)
     
15
 
Washington State Health Care Facilities Authority, Revenue Bonds, Virginia Mason Medical
8/17 at 100.00
BBB
15,933
   
Center, Series 2007B, 5.750%, 8/15/37 – ACA Insured
     
1,000
 
Washington State Housing Finance Commission, Non-Profit Housing Revenue Bonds, Mirabella
No Opt. Call
N/R
1,097,600
   
Project, Series 2012A, 6.750%, 10/01/47
     
18,900
 
Total Washington
   
20,907,277
   
West Virginia – 0.4% (0.4% of Total Investments)
     
1,463
 
Berkeley, Hardy and Jefferson Counties, West Virginia, as Joint Issuers, Commercial Development
No Opt. Call
N/R
1,551,920
   
Revenue Bonds, Scattered Site Housing Projects, Series 2010, 5.750%, 12/01/44
     
900
 
Ohio County Commission, West Virginia, Special District Excise Tax Revenue Bonds, Fort Henry
3/16 at 100.00
BBB
902,025
   
Economic Development, Series 2006B, 5.625%, 3/01/36
     
500
 
Ohio County Commission, West Virginia, Tax Increment Revenue Bonds, Fort Henry Centre
6/17 at 100.00
N/R
511,320
   
Financing District, Series 2007A, 5.850%, 6/01/34
     
2,863
 
Total West Virginia
   
2,965,265
   
Wisconsin – 3.2% (2.7% of Total Investments)
     
30
 
Green Bay Redevelopment Authority, Wisconsin, Industrial Development Revenue Bonds, Fort
No Opt. Call
N/R
32,855
   
James Project, Series 1999, 5.600%, 5/01/19 (Alternative Minimum Tax)
     
2,000
 
Lac Courte Oreilles Band of Lake Superior Chippewa Indians, Wisconsin, Revenue Bonds, Series
12/18 at 102.00
N/R
2,063,760
   
2006, 7.000%, 12/01/26
     
1,650
 
Public Finance Authority of Wisconsin, Charter School Revenue Bonds, Thomas Jefferson
7/19 at 100.00
BBB–
1,794,326
   
Classical Academy of Mooresboro, North Carolina, Series 2011, 7.125%, 7/01/42
     
830
 
Public Finance Authority of Wisconsin, Educational Facility Revenue Bonds, Cottonwood Classical
No Opt. Call
N/R
858,800
   
Preparatory School in Albuquerque, New Mexico, Series 2012A, 6.250%, 12/01/42
     
1,060
 
Public Finance Authority of Wisconsin, Revenue Bonds, Roseman University of Health Sciences,
4/25 at 100.00
BB–
1,096,146
   
Series 2015, 5.875%, 4/01/45
     
1,000
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Froedtert Community Health,
4/19 at 100.00
AA–
1,352,480
   
Inc. Obligated Group, Tender Option Bond Trust 2015-XF0118, 18.942%, 4/01/39 (IF) (6)
     
   
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan Health,
     
   
Tender Option Bond Trust 2113:
     
5,995
 
5.250%, 8/15/26 (Pre-refunded 8/15/16) (UB)
8/16 at 100.00
A–
6,132,465
4,500
 
5.250%, 8/15/34 (Pre-refunded 8/15/16) (UB)
8/16 at 100.00
A–
4,588,515
1,500
 
Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan
8/16 at 100.00
A– (5)
1,618,020
   
Healthcare System, Series 2006, Trust 2187, 16.746%, 8/15/34 (Pre-refunded 8/15/16) (IF)
     
2,000
 
Wisconsin Public Finance Authority, Revenue Bonds, SearStone Retirement Community of Cary
6/22 at 100.00
N/R
2,399,120
   
North Carolina, Series 2012A, 8.625%, 6/01/47
     
20,565
 
Total Wisconsin
   
21,936,487
$ 787,692
 
Total Municipal Bonds (cost $724,779,126)
   
787,208,498
 
Shares
 
Description (1)
   
Value
   
COMMON STOCKS – 1.3% (1.1% of Total Investments)
     
           
   
Airlines – 1.3% (1.1% of Total Investments)
     
227,514
 
American Airlines Group Inc. (17)
   
$ 8,870,771
   
Total Common Stocks (cost $6,316,916)
   
8,870,771
 
Principal
           
Amount (000)
 
Description (1)
Coupon
Maturity
Ratings (3)
Value
   
CORPORATE BONDS – 0.2% (0.2% of Total Investments)
       
             
   
Real Estate Management & Development – 0.2% (0.2% of Total Investments)
       
$ 2,032
 
AAF HLG/FIN, 144A
12.000%
7/01/19
N/R
$ 1,706,775
   
Transportation – 0.0% (0.0% of Total Investments)
       
27
 
Las Vegas Monorail Company, Senior Interest Bonds (7), (18)
5.500%
7/15/19
N/R
813
7
 
Las Vegas Monorail Company, Senior Interest Bonds (7), (18)
5.500%
7/15/55
N/R
216
34
 
Total Transportation
     
1,029
$ 2,066
 
Total Corporate Bonds (cost $1,882,149)
     
1,707,804
   
Total Long-Term Investments (cost $732,978,191)
     
797,787,073
   
Floating Rate Obligations – (4.1)%
     
(28,490,000)
   
Variable Rate MuniFund Term Preferred Shares, at Liquidation Value – (12.5)% (19)
     
(87,000,000)
   
Other Assets Less Liabilities – 1.7%
     
11,897,605
   
Net Assets Applicable to Common Shares – 100%
     
$ 694,194,678
 
 
 

 
 
Fair Value Measurements
 
Fair value is defined as the price that would be received upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The following is a summary of the three-tiered hierarchy of valuation input levels.
 
Level 1 – Inputs are unadjusted and prices are determined using quoted prices in active markets for identical securities.
 
Level 2 – Prices are determined using other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).
 
Level 3 – Prices are determined using significant unobservable inputs (including management’s assumptions in determining the fair value of investments).
 
The inputs or methodologies used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a summary of the Fund's fair value measurements as of the end of the reporting period:
 
 
Level 1
Level 2
Level 3
Total
Long-Term Investments:
       
Municipal Bonds
$           —
$786,706,237
$502,261
$787,208,498
Common Stocks
8,870,771
8,870,771
Corporate Bonds
1,706,775
1,029
1,707,804
Total
$8,870,771
$788,413,012
$503,290
$797,787,073
 
 
Income Tax Information
 
The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate securities reflected as financing transactions, if any. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.
 
As of January 31, 2016, the cost of investments was $703,685,661.
 
Gross unrealized appreciation and gross unrealized depreciation of investments as of January 31, 2016, were as follows:
   
Gross unrealized:
 
Appreciation
$ 102,953,464
Depreciation
(37,342,387)
Net unrealized appreciation (depreciation) of investments
$  65,611,077
 
     
(1)
 
All percentages shown in the Portfolio of Investments are based on net assets applicable to common
   
shares unless otherwise noted.
(2)
 
Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption.
   
There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities
   
may be subject to periodic principal paydowns.
(3)
 
Ratings: Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service,
   
Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or
   
BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any
   
of these national rating agencies.
(4)
 
As of, or subsequent to, the end of the reporting period this security is non-income producing. Non-income
   
producing, in the case of a fixed-income security, generally denotes that the issuer has (1) defaulted on
   
the payment of principal or interest, (2) is under the protection of the Federal Bankruptcy Court or (3) the
   
Fund’s Adviser has concluded that the issue is not likely to meet its future interest payment obligations
   
and has ceased accruing additional income on the Fund’s records.
(5)
 
Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities,
   
which ensure the timely payment of principal and interest. Certain bonds backed by U.S. Government or
   
agency securities are regarded as having an implied rating equal to the rating of such securities.
(6)
 
Investment, or portion of investment, has been pledged to collateralize the net payment obligations for
   
investments in inverse floating rate transactions.
(7)
 
Investment valued at fair value using methods determined in good faith by, or at the discretion of, the Board.
   
For fair value measurement disclosure purposes, investment classified as Level 3.
(8)
 
On January 1, 2016, the Fund's Adviser determined it was likely that this borrower would fulfill a portion
   
of its obligation on this security, and therefore increased the security's interest rate of accrual from
   
4.750% to 5.250%.
(9)
 
On July 28, 2015, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security's interest rate of accrual from 6.125% to
   
3.675%. On December 9, 2015, the Fund's Adviser determined it was likely that this borrower would
   
fulfill a portion of its obligation on this security, and therefore increased the security's interest rate of
   
accrual from 3.675% to 4.900%.
(10)
 
On June 1, 2013, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on the security, and therefore reduced the security's interest rate of accrual from 7.250% to
   
1.813%. On May 7, 2015, the Fund's Adviser has concluded that the issue is not likely to meet its future
   
interest payment obligations and has ceased accruing additional income on the Fund's records.
(11)
 
On January 7, 2015, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security's interest rate of accrual from 7.125% to
   
5.700% and again on November 11, 2015, further reduced the security's interest rate of accrual
   
from 5.700% to 4.275%.
(12)
 
On May 7, 2015, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security's interest rate of accrual from 5.250%
   
to 2.100%.
(13)
 
On July 1, 2014, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security's interest rate of accrual from 6.000%
   
to 4.200%.
(14)
 
On April 1, 2013, the Fund's Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security's interest rate of accrual from 5.875%
   
to 2.350%.
(15)
 
On April 1, 2013, the Fund’s Adviser determined it was unlikely that this borrower would fulfill its entire
   
obligation on this security, and therefore reduced the security’s interest rate of accrual from 5.875%
   
to 2.350%.
(16)
 
On September 1, 2013, the Fund's Adviser determined it was unlikely that this borrower would fulfill
   
its entire obligation on this security, and therefore reduced the security's interest rate of accrual
   
from 6.250% to 4.688%.
(17)
 
On November 28, 2011, AMR Corp. (“AMR”), the parent company of American Airlines Group, Inc. (“AAL”)
   
filed for federal bankruptcy protection. On December 9, 2013, AMR emerged from federal bankruptcy with
   
the acceptance of its reorganization plan by the bankruptcy court. Under the settlement agreement
   
established to meet AMR’s unsecured bond obligations, the bondholders, including the Fund, received a
   
distribution of AAL preferred stock which was converted to AAL common stock over a 120-day period.
   
Every 30 days, a quarter of the preferred stock was converted to AAL common stock based on the 5-day
   
volume-weighted average price and the amount of preferred shares tendered during the optional preferred
   
conversion period.
(18)
 
During January 2010, Las Vegas Monorail Company (“Las Vegas Monorail”) filed for federal bankruptcy
   
protection. During March 2012, Las Vegas Monorail emerged from federal bankruptcy with the acceptance
   
of a reorganization plan assigned by the Federal Bankruptcy Court. Under the reorganization plan, the Fund
   
surrendered its Las Vegas Monorail Project Revenue Bonds, First Tier, Series 2000 and in turn received two
   
senior interest corporate bonds: the first with an annual coupon rate of 5.500% maturing on July 15, 2019
   
and the second with an annual coupon rate of 3.000% (5.500% after December 31, 2015) maturing on
   
July 15, 2055. The Fund is not accruing income for either senior interest corporate bond.
(19)
 
Variable Rate MuniFund Term Preferred Shares, at Liquidation Value as a percentage of Total Investments
   
is 10.9%.
(IF)
 
Inverse floating rate investment.
(UB)
 
Underlying bond of an inverse floating rate trust reflected as a financing transaction.
(WI/DD)
 
Investment, or portion of investment, purchased on a when-issued or delayed delivery basis.
144A
 
Investment is exempt from registration under Rule 144A of the Securities Act of 1933, as amended.
   
These investments may only be resold in transactions exempt from registration, which are normally
   
those transactions with qualified institutional buyers.
 
 
 

 
 
Item 2. Controls and Procedures.

a.  
The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
 
b.  
There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.
 
Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: See EX-99 CERT attached hereto.

 
 
 

 
 
SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
(Registrant)  Nuveen Municipal High Income Opportunity Fund 
 
By (Signature and Title) /s/ Kevin J. McCarthy                    
       Kevin J. McCarthy
     Vice President and Secretary
                                         
Date:         March 31, 2016        
 
Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
 
By (Signature and Title) /s/ Gifford R. Zimmerman            
       Gifford R. Zimmerman
     Chief Administrative Officer (principal executive officer)
                        
Date:         March 31, 2016        
 
By (Signature and Title) /s/ Stephen D. Foy                         
 
     Stephen D. Foy
     Vice President and Controller (principal financial officer)
                                                                                         
Date:         March 31, 2016