| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Municipal Obligations–157.05%(a) | ||||||
| Alabama–2.53% | ||||||
| Alabama (State of) Special Care Facilities Financing Authority (Ascension Health Senior Credit Group); Series 2016 B, Ref. RB | 5.00% | 11/15/2046 | $ 4,390 | $ 5,072,689 | ||
| Alabaster (City of), AL Board of Education; | ||||||
| Series 2014 A, GO Wts. (INS -AGM)(b) | 5.00% | 09/01/2039 | 1,130 | 1,294,618 | ||
| Series 2014 A, GO Wts. (INS -AGM)(b) | 5.00% | 09/01/2044 | 1,130 | 1,289,861 | ||
| Birmingham (City of), AL Airport Authority; Series 2010, RB (INS -AGM)(b) | 5.25% | 07/01/2030 | 2,100 | 2,142,651 | ||
| Birmingham (City of), AL Special Care Facilities Financing Authority (Methodist Home for the Aging); | ||||||
| Series 2016, RB | 5.25% | 06/01/2025 | 700 | 752,584 | ||
| Series 2016, RB | 5.75% | 06/01/2045 | 25 | 27,950 | ||
| Birmingham (City of), AL Water Works Board; Series 2011, RB (INS -AGM)(b)(c) | 5.00% | 01/01/2036 | 3,060 | 3,188,489 | ||
| Lower Alabama Gas District (The); Series 2016 A, RB (c) | 5.00% | 09/01/2046 | 2,400 | 3,383,688 | ||
| Tuscaloosa (County of), AL Industrial Development Authority (Hunt Refining); Series 2019 A, Ref. IDR (d) | 5.25% | 05/01/2044 | 820 | 944,132 | ||
| 18,096,662 | ||||||
| Alaska–0.60% | ||||||
| Alaska (State of) Industrial Development & Export Authority (Providence Health Services); Series 2011 A, RB (c) | 5.50% | 10/01/2041 | 4,065 | 4,325,282 | ||
| Arizona–5.11% | ||||||
| Arizona (State of) Health Facilities Authority (Phoenix Children’s Hospital); Series 2012, Ref. RB | 5.00% | 02/01/2042 | 2,050 | 2,175,316 | ||
| Arizona (State of) Health Facilities Authority (Scottsdale Lincoln Hospital); Series 2014, Ref. RB | 5.00% | 12/01/2042 | 1,965 | 2,227,779 | ||
| Arizona (State of) Industrial Development Authority (Great Laked Senior Living Community); | ||||||
| Series 2019 A, RB | 5.00% | 01/01/2036 | 400 | 461,784 | ||
| Series 2019 A, RB | 5.00% | 01/01/2037 | 1,000 | 1,153,850 | ||
| Arizona (State of) Industrial Development Authority (Leman Academy of Excellence); Series 2017 A, Ref. RB (d) | 5.00% | 07/01/2037 | 675 | 696,276 | ||
| Arizona (State of) Transportation Board; Series 2011 A, Ref. RB (c) | 5.00% | 07/01/2036 | 3,450 | 3,658,725 | ||
| City of Phoenix Civic Improvement Corp.; Series 2019, RB | 5.00% | 07/01/2049 | 2,850 | 3,472,924 | ||
| Glendale (City of), AZ Industrial Development Authority (The Beatitudes Campus); | ||||||
| Series 2017, Ref. RB | 5.00% | 11/15/2031 | 1,220 | 1,330,386 | ||
| Series 2017, Ref. RB | 5.00% | 11/15/2045 | 835 | 890,778 | ||
| La Paz (County of), AZ Industrial Development Authority (Charter School Solutions- Harmony Public Schools); Series 2018 A, RB | 5.00% | 02/15/2048 | 700 | 789,502 | ||
| Maricopa (County of), AZ Industrial Development Authority (Legacy Traditional Schools); Series 2019, Ref. RB (d) | 5.00% | 07/01/2049 | 600 | 663,144 | ||
| Maricopa County Pollution Control Corp. (Southern California Education Co.); Series 2000 B, Ref. RB | 5.00% | 06/01/2035 | 1,110 | 1,130,679 | ||
| Mesa (City of), AZ; Series 2013, RB (c) | 5.00% | 07/01/2032 | 7,600 | 8,345,104 | ||
| Phoenix (City of), AZ Industrial Development Authority (Legacy Traditional Schools); Series 2014 A, RB (d) | 6.50% | 07/01/2034 | 450 | 520,430 | ||
| Phoenix (City of), AZ Industrial Development Authority (Rowan University); Series 2012, RB | 5.00% | 06/01/2042 | 2,780 | 2,961,951 | ||
| Pima (County of), AZ Industrial Development Authority (Edkey Charter Schools); Series 2013, Ref. RB | 6.00% | 07/01/2033 | 1,000 | 1,007,660 | ||
| Pima (County of), AZ Industrial Development Authority (Grande Innovations Academy); Series 2018, RB (d) | 5.25% | 07/01/2048 | 1,125 | 1,161,394 | ||
| Pima (County of), AZ Industrial Development Authority (Tucson Electric Power Co.); Series 2010 A, IDR | 5.25% | 10/01/2040 | 2,525 | 2,594,968 | ||
| Yuma (City of), AZ Industrial Development Authority (Regional Medical Center); | ||||||
| Series 2014 A, RB | 5.00% | 08/01/2020 | 500 | 512,430 | ||
| Series 2014 A, RB | 5.00% | 08/01/2021 | 800 | 848,744 | ||
| 36,603,824 | ||||||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | ||
| California–22.00% | |||||
| Alhambra Unified School District (Election of 2004); | |||||
| Series 2009 B, GO Bonds (INS -AGC)(b)(e) | 0.00% | 08/01/2035 | $ 3,570 | $ 2,424,565 | |
| Series 2009 B, GO Bonds (INS -AGC)(b)(e) | 0.00% | 08/01/2036 | 5,770 | 3,794,179 | |
| Bay Area Toll Authority (San Francisco Bay Area); Series 2017 F-1, RB (c) | 5.00% | 04/01/2056 | 2,280 | 2,712,721 | |
| Beverly Hills Unified School District (Election of 2008); | |||||
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2026 | 1,390 | 1,251,320 | |
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2031 | 2,680 | 2,087,345 | |
| California (County of), CA Tobacco Securitization Agency (Alameda County Tobacco Asset Securitization Corp.); Series 2006 C, RB (e) | 0.00% | 06/01/2055 | 10,115 | 610,137 | |
| California (State of); | |||||
| Series 2012, GO Bonds | 5.25% | 04/01/2035 | 4,305 | 4,708,852 | |
| Series 2012, GO Bonds | 5.00% | 09/01/2036 | 2,460 | 2,715,127 | |
| Series 2012, Ref. GO Bonds | 5.00% | 02/01/2032 | 2,600 | 2,814,136 | |
| California (State of) Community Housing Agency (Annadel Apartments); Series 2019 A, RB (d) | 5.00% | 04/01/2049 | 790 | 878,275 | |
| California (State of) Health Facilities Financing Authority (City of Hope); Series 2012 A, RB | 5.00% | 11/15/2032 | 3,500 | 3,866,835 | |
| California (State of) Municipal Finance Authority (CHF-Davis I, LLC - West Village Student Housing Project); Series 2018, RB | 5.00% | 05/15/2035 | 1,185 | 1,439,479 | |
| California (State of) Municipal Finance Authority (Linxs APM); Series 2018 A, RB (f) | 5.00% | 12/31/2043 | 885 | 1,037,061 | |
| California (State of) Municipal Finance Authority (United Airlines, Inc.); Series 2019, Ref. RB (f) | 4.00% | 07/15/2029 | 635 | 721,049 | |
| California (State of) Pollution Control Finance Authority; | |||||
| Series 2012, RB (d)(f) | 5.00% | 07/01/2027 | 1,230 | 1,336,161 | |
| Series 2012, RB (d)(f) | 5.00% | 07/01/2030 | 1,450 | 1,565,319 | |
| Series 2012, RB (d)(f) | 5.00% | 07/01/2037 | 3,195 | 3,417,244 | |
| California (State of) Public Works Board (Various Capital); Series 2013 I, RB | 5.00% | 11/01/2020 | 1,000 | 1,036,180 | |
| California (State of) Statewide Communities Development Authority (Loma Linda University Medical Center); | |||||
| Series 2014, RB | 5.25% | 12/01/2044 | 780 | 862,602 | |
| Series 2016 A, RB (d) | 5.00% | 12/01/2041 | 1,245 | 1,395,097 | |
| Series 2016 A, RB (d) | 5.25% | 12/01/2056 | 950 | 1,069,947 | |
| California Infrastructure & Economic Development Bank; | |||||
| Series 2003 A, RB (INS -AMBAC)(b)(c) | 5.00% | 07/01/2036 | 1,700 | 2,203,489 | |
| Series 2003 A, RB (c)(g)(h) | 5.00% | 01/01/2028 | 3,300 | 4,277,361 | |
| Clovis Unified School District (Election of 2004); Series 2004 A, GO Bonds (INS -NATL)(b)(e) | 0.00% | 08/01/2029 | 695 | 565,522 | |
| Dry Creek Joint Elementary School District (Election of 2008-Measure E); | |||||
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2040 | 4,685 | 2,556,651 | |
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2041 | 4,965 | 2,612,831 | |
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2042 | 5,265 | 2,661,668 | |
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2043 | 3,460 | 1,671,734 | |
| Series 2009, GO Bonds (e) | 0.00% | 08/01/2044 | 4,825 | 2,249,704 | |
| East Bay Municipal Utility District; Series 2010 A, Ref. RB (c) | 5.00% | 06/01/2036 | 4,770 | 4,867,690 | |
| El Segundo Unified School District (Election of 2008); | |||||
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2031 | 1,775 | 1,366,626 | |
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2032 | 1,980 | 1,481,139 | |
| Golden State Tobacco Securitization Corp.; | |||||
| Series 2013 A, RB | 5.00% | 06/01/2030 | 3,250 | 3,647,117 | |
| Series 2018 A-1, Ref. RB | 5.00% | 06/01/2047 | 675 | 694,514 | |
| Series 2018 A-2, Ref. RB | 5.00% | 06/01/2047 | 2,350 | 2,417,938 | |
| Los Angeles (City of), CA Department of Airports (Los Angeles International Airport); Series 2010 A, RB (c) | 5.00% | 05/15/2035 | 6,000 | 6,105,000 | |
| Los Angeles (City of), CA Department of Water & Power; Series 2012 A, RB (c) | 5.00% | 07/01/2043 | 6,510 | 7,134,830 | |
| Menifee Union School District (Election of 2008); Series 2009 C, GO Bonds (INS -AGC)(b)(e) | 0.00% | 08/01/2034 | 1,985 | 1,373,104 | |
| Moreland School District (Crossover Series 14); Series 2006 C, Ref. GO Bonds (INS -AMBAC)(b)(e) | 0.00% | 08/01/2029 | 3,955 | 3,245,987 | |
| Mt. San Antonio Community College District (Election 2008); Series 2013 A, GO Bonds (i) | 6.25% | 08/01/2043 | 1,900 | 1,891,355 | |
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| California–(continued) | ||||||
| Oak Grove School District (Election of 2008); Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2028 | $ 2,875 | $ 2,412,297 | ||
| Patterson Joint Unified School District (Election of 2008); | ||||||
| Series 2009 B, GO Bonds (INS -AGM)(b)(e) | 0.00% | 08/01/2036 | 4,025 | 2,577,972 | ||
| Series 2009 B, GO Bonds (INS -AGM)(b)(e) | 0.00% | 08/01/2037 | 1,590 | 983,351 | ||
| Poway Unified School District (Election of 2008 - School Facilities Improvement District No. 2007-1); | ||||||
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2027 | 4,005 | 3,470,212 | ||
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2031 | 5,000 | 3,831,950 | ||
| Regents of the University of California; Series 2013 AI, RB (c) | 5.00% | 05/15/2033 | 4,000 | 4,499,320 | ||
| San Buenaventura (City of), CA (Community Memorial Health System); Series 2011, RB | 7.50% | 12/01/2041 | 2,085 | 2,295,731 | ||
| San Diego (City of), CA Community College District (Election of 2006); Series 2011, GO Bonds (c) | 5.00% | 08/01/2036 | 6,790 | 7,252,535 | ||
| San Diego (County of), CA Regional Airport Authority; Series 2010 A, RB (g) | 5.00% | 07/01/2034 | 875 | 895,676 | ||
| San Francisco (City & County of), CA Airport Commission (San Francisco International Airport); | ||||||
| Series 2011 F, Ref. RB (f) | 5.00% | 05/01/2025 | 1,000 | 1,054,840 | ||
| Series 2011 F, Ref. RB (f) | 5.00% | 05/01/2026 | 1,995 | 2,104,107 | ||
| Series 2011 G, Ref. RB (g)(h) | 5.25% | 05/03/2021 | 3,615 | 3,832,659 | ||
| Series 2011 G, Ref. RB | 5.25% | 05/01/2027 | 1,385 | 1,467,394 | ||
| Series 2019 A, Ref. RB (f) | 5.00% | 05/01/2036 | 1,110 | 1,374,680 | ||
| San Francisco (City & County of), CA Public Utilities Commission (Water System Improvement Program); Subseries 2011 A, RB (c) | 5.00% | 11/01/2036 | 4,320 | 4,642,229 | ||
| San Jose Evergreen Community College District (Election of 2004); Series 2008 B, GO Bonds (INS -AGM)(b)(e) | 0.00% | 09/01/2030 | 3,300 | 2,641,419 | ||
| Santa Margarita Water District (Community Facilities District No. 2013-1); Series 2013, RB | 5.50% | 09/01/2032 | 590 | 652,782 | ||
| Silicon Valley Tobacco Securitization Authority (Santa Clara); Series 2007 A, RB (e) | 0.00% | 06/01/2041 | 3,295 | 988,632 | ||
| William S. Hart Union High School District (Election of 2008); | ||||||
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2032 | 15,570 | 11,632,503 | ||
| Series 2009 A, GO Bonds (e) | 0.00% | 08/01/2033 | 5,725 | 4,144,499 | ||
| 157,522,679 | ||||||
| Colorado–3.66% | ||||||
| Colorado (State of) Health Facilities Authority (Adventhealth Obligated); Series 2019, Ref. RB | 4.00% | 11/15/2043 | 1,980 | 2,215,085 | ||
| Colorado (State of) Health Facilities Authority (CommonSpirit Health); | ||||||
| Series 2019 A-1, Ref. RB | 4.00% | 08/01/2044 | 1,585 | 1,707,647 | ||
| Series 2019 A-2, Ref. RB | 5.00% | 08/01/2044 | 790 | 933,401 | ||
| Colorado (State of) Health Facilities Authority (Evangelical Lutheran Good Samaritan Society (The)); Series 2017, Ref. RB (g)(h) | 5.00% | 06/01/2027 | 555 | 698,029 | ||
| Colorado (State of) Health Facilities Authority (SCL Health System); Series 2013 A, RB (c) | 5.50% | 01/01/2035 | 3,900 | 4,467,567 | ||
| Colorado (State of) Regional Transportation District (Denver Transit Partners Eagle P3); Series 2019, RB | 6.00% | 01/15/2041 | 3,200 | 3,273,376 | ||
| Colorado (State of) Science and Technology Park Metropolitan District No. 1; Series 2018, Ref. RB | 5.00% | 12/01/2033 | 500 | 534,325 | ||
| Denver (City & County of), CO; | ||||||
| Series 2013 B, RB | 5.25% | 11/15/2032 | 5,000 | 5,700,850 | ||
| Series 2018 A, Ref. RB (c)(f) | 5.25% | 12/01/2048 | 4,160 | 5,025,946 | ||
| Neu Towne Metropolitan District; Series 2018 A, Ref. GO Bonds | 5.38% | 12/01/2046 | 665 | 698,363 | ||
| Prairie Center Metropolitan District No. 3; Series 2017 A, Ref. RB (d) | 5.00% | 12/15/2041 | 910 | 963,008 | ||
| 26,217,597 | ||||||
| Connecticut–0.63% | ||||||
| Connecticut (State of) Health & Educational Facilities Authority (Hartford Healthcare); Series 2011 A, RB | 5.00% | 07/01/2041 | 4,300 | 4,493,500 | ||
| District of Columbia–1.89% | ||||||
| District of Columbia; | ||||||
| Series 2006 B-1, RB (INS -NATL)(b) | 5.00% | 02/01/2031 | 2,220 | 2,225,905 | ||
| Series 2009 A, RB (c) | 5.25% | 12/01/2027 | 3,040 | 3,040,365 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| District of Columbia–(continued) | ||||||
| District of Columbia (Provident Group - Howard Properties LLC); Series 2013, RB | 5.00% | 10/01/2045 | $ 1,910 | $ 1,968,217 | ||
| Metropolitan Washington Airports Authority (Dulles Metrorail and Capital Improvement); Series 2014 A, Ref. RB | 5.00% | 10/01/2053 | 5,930 | 6,334,189 | ||
| 13,568,676 | ||||||
| Florida–10.22% | ||||||
| Alachua (County of), FL Health Facilities Authority (Shands Teaching Hospital & Clinics); Series 2019, RB | 4.00% | 12/01/2049 | 1,185 | 1,286,732 | ||
| Alachua (County of), FL Health Facilities Authority (Terraces at Bonita Springs); Series 2011 A, RB | 8.13% | 11/15/2041 | 1,000 | 1,006,240 | ||
| Broward (County of), FL; | ||||||
| Series 2012 A, RB (g)(h) | 5.00% | 10/01/2022 | 2,145 | 2,375,352 | ||
| Series 2013 C, RB (g)(h) | 5.25% | 10/01/2023 | 2,500 | 2,872,575 | ||
| Series 2015 A, RB (f) | 5.00% | 10/01/2045 | 1,010 | 1,148,471 | ||
| Series 2017, RB (c)(f) | 5.00% | 10/01/2047 | 3,450 | 4,035,810 | ||
| Series 2019 B, RB (f) | 4.00% | 09/01/2049 | 790 | 857,972 | ||
| Cape Coral (City of), FL Health Facilities Authority (Gulf Care, Inc.); Series 2015, Ref. RB (d) | 6.00% | 07/01/2045 | 240 | 261,523 | ||
| Capital Trust Agency (Sarasota-Manatee Jewish Housing Council, Inc.); Series 2017, Ref. RB (d) | 5.00% | 07/01/2046 | 1,250 | 1,330,137 | ||
| Citizens Property Insurance Corp.; Series 2012 A-1, RB | 5.00% | 06/01/2021 | 5,110 | 5,397,540 | ||
| Davie (Town of), FL (Nova Southeastern University); Series 2013 A, RB | 6.00% | 04/01/2042 | 1,250 | 1,401,800 | ||
| Florida (State of) North Broward Hospital District; Series 2017 B, Ref. RB | 5.00% | 01/01/2048 | 2,850 | 3,218,790 | ||
| Florida (State of) Ports Financing Commission (State Transportation Trust Fund); Series 2011 B, Ref. RB (f) | 5.13% | 06/01/2027 | 995 | 1,048,501 | ||
| Greater Orlando Aviation Authority; Series 2019 A, RB (f) | 4.00% | 10/01/2039 | 2,500 | 2,800,350 | ||
| Hillsborough (County of), FL Aviation Authority (Tampa International Airport); Series 2018 E, RB (f) | 5.00% | 10/01/2048 | 1,960 | 2,335,183 | ||
| Martin (County of), FL Health Facilities Authority (Martin Memorial Medical Center); Series 2012, RB (g)(h) | 5.00% | 11/15/2021 | 4,630 | 4,966,184 | ||
| Miami Beach (City of), FL Health Facilities Authority (Mount Sinai Medical Center); Series 2014, Ref. RB | 5.00% | 11/15/2039 | 845 | 946,527 | ||
| Miami-Dade (County of), FL; | ||||||
| Series 2012 A, Ref. RB (f)(g)(h) | 5.00% | 10/01/2022 | 1,000 | 1,102,970 | ||
| Series 2012 B, Ref. RB (INS -AGM)(b) | 5.00% | 10/01/2035 | 1,750 | 1,913,205 | ||
| Series 2016 A, Ref. RB | 5.00% | 10/01/2041 | 1,170 | 1,377,301 | ||
| Miami-Dade (County of), FL Educational Facilities Authority (University of Miami); Series 2018 A, RB (c) | 5.00% | 04/01/2053 | 3,650 | 4,313,169 | ||
| Miami-Dade (County of), FL Expressway Authority; Series 2010 A, Ref. RB | 5.00% | 07/01/2040 | 2,500 | 2,550,850 | ||
| Miami-Dade (County of), FL Health Facilities Authority (Miami Children’s Hospital); | ||||||
| Series 2010, Ref. RB (g)(h) | 6.00% | 08/01/2020 | 880 | 907,359 | ||
| Series 2010, Ref. RB | 6.00% | 08/01/2030 | 315 | 324,006 | ||
| Miami-Dade (County of), FL Industrial Development Authority (Waste Management, Inc.); Series 2018 B, RB (SIFMA Municipal Swap Index + 0.80%)(f)(h)(j) | 1.90% | 11/01/2021 | 555 | 555,011 | ||
| Orange (County of), FL; Series 2012 B, Ref. RB (c) | 5.00% | 01/01/2031 | 7,855 | 8,485,914 | ||
| Orlando (City of), FL Greater Orlando Aviation Authority; Series 2017 A, RB (f) | 5.00% | 10/01/2047 | 935 | 1,094,483 | ||
| Palm Beach (County of), FL Health Facilities Authority (BRRH Corp. Obligated Group); Series 2014, Ref. RB (g)(h) | 5.00% | 12/01/2024 | 1,125 | 1,322,089 | ||
| Palm Beach (County of), FL Health Facilities Authority (Jupiter Medical Center, Inc.); Series 2013 A, RB | 5.00% | 11/01/2043 | 2,030 | 2,152,551 | ||
| Palm Beach (County of), FL Solid Waste Authority; Series 2016, RB (c) | 5.00% | 10/01/2031 | 3,330 | 3,545,118 | ||
| Putnam (County of), FL Development Authority (Seminole Electric Cooperative); Series 2018 B, Ref. PCR | 5.00% | 03/15/2042 | 790 | 936,079 | ||
| Sumter (County of), FL Industrial Development Authority (Central Florida Health Alliance); | ||||||
| Series 2014 A, RB | 5.00% | 07/01/2025 | 500 | 565,525 | ||
| Series 2014 A, RB | 5.00% | 07/01/2027 | 500 | 561,700 | ||
| Tallahassee (City of), FL (Tallahassee Memorial Health Care, Inc.); Series 2016, RB | 5.00% | 12/01/2055 | 1,270 | 1,418,780 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Florida–(continued) | ||||||
| Tampa Bay Water; Series 2001 A, Ref. RB (INS -NATL)(b) | 6.00% | 10/01/2029 | $ 2,000 | $ 2,785,120 | ||
| 73,200,917 | ||||||
| Georgia–1.62% | ||||||
| Augusta (City of), GA Development Authority; Series 2018, RB | 4.00% | 07/01/2037 | 2,955 | 3,141,136 | ||
| Brookhaven Development Authority (Children’s Healthcare of Atlanta, Inc.); Series 2019 A, RB | 4.00% | 07/01/2049 | 1,575 | 1,747,667 | ||
| Burke (County of), GA Development Authority (Oglethorpe Power Vogtle); Series 2013 A, PCR (h) | 2.40% | 04/01/2020 | 3,200 | 3,208,896 | ||
| Fulton (County of), GA Development Authority (Piedmont Healthcare, Inc.); Series 2020, Ref. RB | 5.00% | 07/01/2044 | 1,590 | 1,880,414 | ||
| Georgia (State of) Municipal Electric Authority (Plant Vogtle Units 3 & 4); Series 2019 A, RB | 5.00% | 01/01/2049 | 610 | 696,376 | ||
| Georgia (State of) Municipal Electric Authority of Georgia (Plant Vogtle Units 3 &4); Series 2019, RB | 4.00% | 01/01/2049 | 870 | 934,223 | ||
| 11,608,712 | ||||||
| Hawaii–1.93% | ||||||
| Hawaii (State of); | ||||||
| Series 2010 A, RB | 5.00% | 07/01/2039 | 4,100 | 4,176,670 | ||
| Series 2015 A, RB (f) | 5.00% | 07/01/2041 | 780 | 890,822 | ||
| Series 2015 A, RB (f) | 5.00% | 07/01/2045 | 1,545 | 1,756,526 | ||
| Hawaii (State of) Department of Budget & Finance (Hawaii Pacific Health Obligated Group); | ||||||
| Series 2010 B, RB (g)(h) | 5.75% | 07/01/2020 | 1,630 | 1,673,032 | ||
| Series 2013 A, Ref. RB | 5.50% | 07/01/2043 | 2,000 | 2,225,620 | ||
| Hawaii (State of) Department of Transportation (Airports Division); Series 2013, COP (f) | 5.00% | 08/01/2020 | 3,055 | 3,128,717 | ||
| 13,851,387 | ||||||
| Idaho–0.44% | ||||||
| Idaho (State of) Health Facilities Authority (Valley Vista Care Corp.); | ||||||
| Series 2017 A, Ref. RB | 5.00% | 11/15/2032 | 700 | 739,438 | ||
| Series 2017 A, Ref. RB | 5.25% | 11/15/2037 | 980 | 1,041,426 | ||
| Regents of the University of Idaho; Series 2011, Ref. RB (h) | 5.25% | 04/01/2021 | 1,300 | 1,362,855 | ||
| 3,143,719 | ||||||
| Illinois–19.07% | ||||||
| Chicago (City of), IL; | ||||||
| Series 1993 B, Ref. GO Bonds (INS -AGM)(b) | 5.13% | 01/01/2022 | 1,675 | 1,727,662 | ||
| Series 2002 B, GO Bonds | 5.50% | 01/01/2037 | 615 | 694,329 | ||
| Series 2005 D, Ref. GO Bonds | 5.50% | 01/01/2040 | 385 | 432,417 | ||
| Series 2007 A, Ref. GO Bonds (INS -AGM)(b) | 5.00% | 01/01/2037 | 3,465 | 3,474,356 | ||
| Series 2007 E, Ref. GO Bonds | 5.50% | 01/01/2042 | 310 | 347,175 | ||
| Series 2012 A, GO Bonds | 5.00% | 01/01/2033 | 1,580 | 1,657,941 | ||
| Series 2012, RB | 5.00% | 01/01/2042 | 2,030 | 2,130,038 | ||
| Series 2014, RB | 5.00% | 11/01/2044 | 790 | 872,176 | ||
| Series 2014, Ref. RB | 5.00% | 01/01/2029 | 1,000 | 1,065,030 | ||
| Series 2015 A, GO Bonds | 5.50% | 01/01/2033 | 3,085 | 3,504,251 | ||
| Series 2017 A, Ref. GO Bonds | 6.00% | 01/01/2038 | 1,850 | 2,224,459 | ||
| Chicago (City of), IL (Midway Airport); | ||||||
| Series 2013 B, Ref. RB | 5.00% | 01/01/2021 | 3,200 | 3,330,848 | ||
| Series 2014 A, Ref. RB (f) | 5.00% | 01/01/2041 | 1,125 | 1,242,619 | ||
| Chicago (City of), IL (O’Hare International Airport); | ||||||
| Series 2015 C, RB (f) | 5.00% | 01/01/2046 | 775 | 865,078 | ||
| Series 2015 D, RB | 5.00% | 01/01/2046 | 540 | 610,184 | ||
| Series 2017 D, RB (c)(f) | 5.00% | 01/01/2042 | 2,500 | 2,896,275 | ||
| Series 2017 D, RB | 5.25% | 01/01/2042 | 1,240 | 1,483,127 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Illinois–(continued) | ||||||
| Chicago (City of), IL Board of Education; | ||||||
| Series 2017 H, GO Bonds | 5.00% | 12/01/2046 | $ 1,825 | $ 2,037,521 | ||
| Series 2018 A, Ref. GO Bonds (INS -AGM)(b) | 5.00% | 12/01/2031 | 625 | 749,775 | ||
| Series 2018 C, Ref. GO Bonds | 5.00% | 12/01/2022 | 950 | 1,023,682 | ||
| Series 2018 C, Ref. GO Bonds | 5.00% | 12/01/2023 | 500 | 549,000 | ||
| Chicago (City of), IL Metropolitan Water Reclamation District (Green Bonds); Series 2016 E, GO Bonds | 5.00% | 12/01/2045 | 1,605 | 1,849,554 | ||
| Chicago (City of), IL Transit Authority; | ||||||
| Series 2011, RB (c)(k) | 5.25% | 12/01/2036 | 8,970 | 9,518,426 | ||
| Series 2014, RB | 5.00% | 12/01/2044 | 3,380 | 3,743,654 | ||
| Cook (County of), IL Forest Preserve District; | ||||||
| Series 2012 B, Ref. GO Bonds (c) | 5.00% | 12/15/2032 | 2,540 | 2,694,813 | ||
| Series 2012 B, Ref. GO Bonds (c) | 5.00% | 12/15/2037 | 2,540 | 2,680,919 | ||
| Illinois (State of); | ||||||
| First Series 2001, GO Bonds (INS -NATL)(b) | 6.00% | 11/01/2026 | 2,000 | 2,336,080 | ||
| Series 2006, GO Bonds | 5.50% | 01/01/2030 | 975 | 1,188,964 | ||
| Series 2012 A, GO Bonds | 5.00% | 01/01/2031 | 1,115 | 1,168,910 | ||
| Series 2013, GO Bonds (INS -AGM)(b) | 5.25% | 07/01/2029 | 1,960 | 2,167,446 | ||
| Series 2014, GO Bonds | 5.00% | 05/01/2029 | 1,000 | 1,098,170 | ||
| Series 2014, GO Bonds | 5.00% | 05/01/2036 | 750 | 813,683 | ||
| Series 2017 D, GO Bonds | 5.00% | 11/01/2024 | 4,950 | 5,516,577 | ||
| Series 2018 A, Ref. GO Bonds | 5.00% | 10/01/2021 | 790 | 832,889 | ||
| Series 2018 A, Ref. GO Bonds | 5.00% | 10/01/2022 | 555 | 599,733 | ||
| Illinois (State of) Finance Authority (Benedictine University); | ||||||
| Series 2013 A, RB | 5.00% | 10/01/2020 | 1,000 | 1,020,320 | ||
| Series 2013 A, RB | 5.38% | 10/01/2022 | 1,180 | 1,207,175 | ||
| Illinois (State of) Finance Authority (Centegra Health System); Series 2014 A, RB | 5.00% | 09/01/2039 | 1,300 | 1,471,652 | ||
| Illinois (State of) Finance Authority (Lutheran Communities Obligated Group); | ||||||
| Series 2019 A, Ref. RB | 5.00% | 11/01/2035 | 570 | 619,054 | ||
| Series 2019 A, Ref. RB | 5.00% | 11/01/2040 | 580 | 620,107 | ||
| Illinois (State of) Finance Authority (OSF Healthcare System); | ||||||
| Series 2010, Ref. RB (g)(h) | 6.00% | 05/15/2020 | 1,685 | 1,721,177 | ||
| Series 2010, Ref. RB | 6.00% | 05/15/2039 | 270 | 276,423 | ||
| Series 2015 A, Ref. RB | 5.00% | 11/15/2045 | 2,165 | 2,421,553 | ||
| Illinois (State of) Finance Authority (Peace Village); Series 2013, RB (g)(h) | 6.25% | 08/15/2023 | 1,000 | 1,165,990 | ||
| Illinois (State of) Finance Authority (Rush University Medical Center); Series 2015 A, Ref. RB | 5.00% | 11/15/2038 | 1,870 | 2,116,148 | ||
| Illinois (State of) Finance Authority (Swedish Covenant Hospital); | ||||||
| Series 2010 A, Ref. RB (g)(h) | 5.75% | 02/15/2020 | 5,020 | 5,065,983 | ||
| Series 2010 A, Ref. RB (g)(h) | 6.00% | 02/15/2020 | 2,620 | 2,645,257 | ||
| Illinois (State of) Finance Authority (The University of Chicago Medical Center); Series 2011 C, RB (c) | 5.50% | 08/15/2041 | 1,440 | 1,513,166 | ||
| Illinois (State of) Finance Authority (University of Chicago); Series 2013 A, RB (c) | 5.25% | 10/01/2052 | 3,390 | 3,743,509 | ||
| Illinois (State of) Metropolitan Pier & Exposition Authority; Series 2002, RB (INS- AGM)(b)(e) | 0.00% | 12/15/2029 | 2,500 | 1,906,125 | ||
| Illinois (State of) Metropolitan Pier & Exposition Authority (McCormick Place Expansion); | ||||||
| Series 2002 A, RB (INS -NATL)(b)(i) | 5.75% | 06/15/2026 | 8,480 | 9,303,408 | ||
| Series 2010, RB (g)(h) | 5.50% | 06/15/2020 | 560 | 572,942 | ||
| Series 2010, RB | 5.50% | 06/15/2050 | 1,740 | 1,762,898 | ||
| Illinois (State of) Sports Facilities Authority; Series 2014, Ref. RB (INS -AGM)(b) | 5.00% | 06/15/2027 | 3,500 | 3,944,535 | ||
| Illinois (State of) Toll Highway Authority; Series 2013 A, RB (c) | 5.00% | 01/01/2038 | 10,050 | 10,970,781 | ||
| Metropolitan Water Reclamation District of Greater Chicago; Series 2007 B, Ref. GO Bonds | 5.25% | 12/01/2035 | 3,160 | 4,335,899 | ||
| Railsplitter Tobacco Settlement Authority; Series 2010, RB (g)(h) | 5.50% | 06/01/2021 | 4,275 | 4,548,429 | ||
| Sales Tax Securitization Corp.; Series 2018 A, Ref. RB (c) | 5.00% | 01/01/2048 | 3,960 | 4,504,223 | ||
| 136,584,515 | ||||||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Indiana–3.44% | ||||||
| Indiana (State of) Finance Authority (CWA Authority); Series 2011 B, RB | 5.25% | 10/01/2031 | $ 3,000 | $ 3,203,910 | ||
| Indiana (State of) Finance Authority (Ohio River Bridges East End Crossing); | ||||||
| Series 2013 A, RB (f) | 5.00% | 07/01/2035 | 500 | 548,580 | ||
| Series 2013 A, RB (f) | 5.00% | 07/01/2048 | 525 | 568,911 | ||
| Series 2013, RB (f) | 5.00% | 07/01/2040 | 3,480 | 3,793,339 | ||
| Indiana (State of) Finance Authority (Ohio Valley Electric Corp.); Series 2012 A, RB | 5.00% | 06/01/2039 | 2,690 | 2,809,436 | ||
| Indiana (State of) Municipal Power Agency; Series 2013 A, RB (g)(h) | 5.25% | 07/01/2023 | 1,000 | 1,145,190 | ||
| Indianapolis Local Public Improvement Bond Bank; | ||||||
| Series 2011 K, RB | 5.00% | 06/01/2027 | 3,000 | 3,156,240 | ||
| Series 2013 F, RB (c) | 5.00% | 02/01/2030 | 4,500 | 4,962,285 | ||
| Valparaiso (City of), IN (Pratt Paper, LLC); Series 2013, RB (f) | 5.88% | 01/01/2024 | 835 | 908,939 | ||
| Whiting (City of), IN (BP Products North America); Series 2019, Ref. RB (f)(h) | 5.00% | 06/05/2026 | 3,000 | 3,557,760 | ||
| 24,654,590 | ||||||
| Iowa–1.11% | ||||||
| Iowa (State of) Finance Authority (Iowa Fertilizer Co.); | ||||||
| Series 2013, RB (d) | 5.88% | 12/01/2027 | 1,000 | 1,041,160 | ||
| Series 2013, Ref. RB (h) | 5.25% | 12/01/2037 | 1,160 | 1,255,862 | ||
| Series 2019, Ref. RB | 3.13% | 12/01/2022 | 555 | 562,204 | ||
| Iowa (State of) Finance Authority (Lifespace Communities, Inc.); Series 2018 A, RB | 5.00% | 05/15/2043 | 790 | 887,328 | ||
| Iowa (State of) Tobacco Settlement Authority; | ||||||
| Series 2005 C, RB | 5.50% | 06/01/2042 | 1,620 | 1,620,276 | ||
| Series 2005 C, RB | 5.63% | 06/01/2046 | 1,030 | 1,030,175 | ||
| Series 2005 E, RB (e) | 0.00% | 06/01/2046 | 11,725 | 1,532,340 | ||
| 7,929,345 | ||||||
| Kansas–0.38% | ||||||
| Wichita (City of), KS (Presbyterian Manors, Inc.); | ||||||
| Series 2013 IV-A, RB | 6.38% | 05/15/2043 | 1,500 | 1,646,640 | ||
| Series 2018 I, Ref. RB | 5.00% | 05/15/2047 | 1,000 | 1,075,540 | ||
| 2,722,180 | ||||||
| Kentucky–2.62% | ||||||
| Kentucky (Commonwealth of) Economic Development Finance Authority (Catholic Health Initiatives); Series 2011 B, RB (SIFMA Municipal Swap Index + 1.40%)(h)(j) | 2.50% | 02/01/2025 | 670 | 682,556 | ||
| Kentucky (State of) Economic Development Finance Authority (Next Generation Kentucky Information Highway); | ||||||
| Series 2015 A, RB | 5.00% | 07/01/2040 | 1,220 | 1,339,597 | ||
| Series 2015 A, RB | 5.00% | 01/01/2045 | 895 | 978,638 | ||
| Kentucky (State of) Economic Development Finance Authority (Owensboro Health, Inc.); Series 2017 A, Ref. RB | 5.00% | 06/01/2045 | 935 | 1,052,763 | ||
| Kentucky (State of) Economic Development Finance Authority (Owensboro Medical Health System, Inc.); | ||||||
| Series 2010 A, RB (g)(h) | 6.00% | 06/01/2020 | 1,900 | 1,945,296 | ||
| Series 2010 A, RB (g)(h) | 6.38% | 06/01/2020 | 1,625 | 1,666,746 | ||
| Series 2010 A, RB (g)(h) | 6.50% | 06/01/2020 | 2,050 | 2,103,813 | ||
| Kentucky (State of) Municipal Power Agency (Prarie State); Series 2019 A, Ref. RB | 5.00% | 09/01/2037 | 1,190 | 1,409,626 | ||
| Kentucky (State of) Turnpike Authority (Revitalization); Series 2012 A, RB (g)(h) | 5.00% | 07/01/2022 | 1,860 | 2,042,354 | ||
| Louisville (City of) & Jefferson (County of), KY Metropolitan Government (Norton Healthcare, Inc.); Series 2013 A, RB | 5.50% | 10/01/2033 | 3,000 | 3,390,720 | ||
| Warren (County of), KY (Bowling Green-Warren County Community Hospital Corp.); Series 2013, Ref. RB | 5.00% | 04/01/2035 | 2,000 | 2,179,060 | ||
| 18,791,169 | ||||||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Louisiana–2.05% | ||||||
| Jefferson Sales Tax District; Series 2019 B, RB (INS -AGM)(b) | 4.00% | 12/01/2039 | $ 1,000 | $ 1,130,850 | ||
| Lafayette (City of), LA Public Trust Financing Authority (Ragin’ Cajun Facilities, Inc. - Housing & Parking); Series 2010, RB (g)(h) | 5.25% | 10/01/2020 | 2,450 | 2,533,300 | ||
| Louisiana (State of) Energy & Power Authority (LEPA Unit No. 1); | ||||||
| Series 2013 A, RB (INS -AGM)(b) | 5.25% | 06/01/2028 | 2,000 | 2,242,420 | ||
| Series 2013 A, RB (INS -AGM)(b) | 5.25% | 06/01/2031 | 2,000 | 2,238,540 | ||
| Louisiana (State of) Local Government Environmental Facilities & Community Development Authority (St. John the Baptist); Series 2019, RB (d) | 3.90% | 11/01/2044 | 930 | 936,650 | ||
| New Orleans (City of), LA; Series 2014, Ref. RB | 5.00% | 12/01/2021 | 1,000 | 1,066,680 | ||
| Tobacco Settlement Financing Corp.; | ||||||
| Series 2013 A, Ref. RB | 5.50% | 05/15/2030 | 770 | 787,009 | ||
| Series 2013 A, Ref. RB | 5.25% | 05/15/2031 | 770 | 807,029 | ||
| Series 2013 A, Ref. RB | 5.25% | 05/15/2032 | 1,465 | 1,577,175 | ||
| Series 2013 A, Ref. RB | 5.25% | 05/15/2033 | 1,235 | 1,328,193 | ||
| 14,647,846 | ||||||
| Maryland–1.01% | ||||||
| Howard (County of), MD (Downtown Columbia); | ||||||
| Series 2017 A, RB (d) | 4.38% | 02/15/2039 | 1,000 | 1,060,940 | ||
| Series 2017 A, RB (d) | 4.50% | 02/15/2047 | 500 | 529,055 | ||
| Maryland (State of) Health & Higher Educational Facilities Authority (LifeBridge Health); Series 2016, Ref. RB | 5.00% | 07/01/2047 | 705 | 817,398 | ||
| Maryland (State of) Health & Higher Educational Facilities Authority (Peninsula Regional Medical Center); Series 2015, Ref. RB | 5.00% | 07/01/2045 | 1,435 | 1,609,367 | ||
| Maryland Economic Development Corp. (Terminal); Series 2010 B, RB (g)(h) | 5.75% | 06/01/2020 | 2,440 | 2,495,290 | ||
| Prince Georges (County of), MD (Collington Episcopal Life Care Community, Inc.); Series 2017, Ref. RB | 5.00% | 04/01/2028 | 670 | 740,819 | ||
| 7,252,869 | ||||||
| Massachusetts–3.91% | ||||||
| Massachusetts (Commonwealth of) Transportation Fund Revenue; Series 2016 B, RB | 4.00% | 06/01/2046 | 2,385 | 2,606,590 | ||
| Massachusetts (State of) (Consolidated Loan of 2019); Series 2019, GO Bonds | 5.00% | 05/01/2047 | 3,000 | 3,699,840 | ||
| Massachusetts (State of) Department of Transportation (Contract Assistance); Series 2010 B, RB | 5.00% | 01/01/2035 | 2,010 | 2,016,070 | ||
| Massachusetts (State of) Development Finance Agency (Berklee College of Music); Series 2007, RB | 5.00% | 10/01/2032 | 165 | 165,507 | ||
| Massachusetts (State of) Development Finance Agency (Emerson College); Series 2016 A, RB | 5.00% | 01/01/2047 | 1,550 | 1,770,147 | ||
| Massachusetts (State of) Development Finance Agency (Partners Healthcare); | ||||||
| Series 2012, RB (g)(h) | 5.00% | 07/01/2021 | 2,890 | 3,064,845 | ||
| Series 2012, RB | 5.00% | 07/01/2031 | 2,730 | 2,882,607 | ||
| Massachusetts (State of) Development Finance Agency (Tufts Medical Center); Series 2011 I, RB (g)(h) | 6.75% | 01/01/2021 | 1,225 | 1,299,075 | ||
| Massachusetts (State of) Port Authority; | ||||||
| Series 2019 A, Ref. RB (f) | 5.00% | 07/01/2037 | 1,000 | 1,236,230 | ||
| Series 2019 C, RB (f) | 5.00% | 07/01/2044 | 2,000 | 2,431,740 | ||
| Massachusetts (State of) Port Authority (Bosfuel); Series 2019 A, Ref. RB (f) | 4.00% | 07/01/2044 | 1,000 | 1,094,320 | ||
| Massachusetts (State of) School Building Authority; Series 2011 B, RB (c) | 5.00% | 10/15/2035 | 5,325 | 5,710,690 | ||
| 27,977,661 | ||||||
| Michigan–3.99% | ||||||
| Detroit Downtown Development Authority; Series 2018 A, RB (INS -AGM)(b)(c)(k) | 5.00% | 07/01/2038 | 1,500 | 1,669,065 | ||
| Grand Rapids Economic Development Corp. (Beacon Hill at Eastgate); Series 2017 A, Ref. RB | 5.00% | 11/01/2052 | 1,185 | 1,258,861 | ||
| Lansing (City of), MI Board of Water & Light; Series 2011 A, RB | 5.00% | 07/01/2037 | 3,400 | 3,586,762 | ||
| Michigan (State of) Building Authority (Facilities Program); Series 2016 I, Ref. RB (c) | 5.00% | 04/15/2041 | 2,655 | 3,130,723 | ||
| Michigan (State of) Finance Authority (Beaumont Health Credit Group); Series 2016, RB | 5.00% | 11/01/2044 | 1,710 | 1,956,428 | ||
| Michigan (State of) Finance Authority (Bronson Healthcare Group); Series 2020 A, Ref. RB | 5.00% | 05/15/2036 | 1,585 | 1,815,126 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Michigan–(continued) | ||||||
| Michigan (State of) Finance Authority (Detroit Water & Sewerage Department); | ||||||
| Series 2014 C-1, Ref. RB | 5.00% | 07/01/2044 | $ 1,130 | $ 1,213,360 | ||
| Series 2014 C-6, Ref. RB | 5.00% | 07/01/2033 | 565 | 643,123 | ||
| Series 2014 D-4, Ref. RB | 5.00% | 07/01/2029 | 565 | 652,445 | ||
| Series 2015, Ref. RB | 5.00% | 07/01/2035 | 1,165 | 1,346,402 | ||
| Michigan (State of) Finance Authority (MidMichigan Health Credit Group); Series 2014, Ref. RB | 5.00% | 06/01/2039 | 2,070 | 2,313,411 | ||
| Michigan (State of) Finance Authority (Trinity Health Credit); Series 2017 MI, Ref. RB (c) | 5.00% | 12/01/2046 | 3,575 | 4,196,979 | ||
| Michigan (State of) Strategic Fund (Canterbury Health Care, Inc.); Series 2016, RB (d) | 5.00% | 07/01/2026 | 700 | 748,307 | ||
| Michigan (State of) Tobacco Settlement Finance Authority; Series 2007 A, RB | 6.00% | 06/01/2048 | 3,180 | 3,197,331 | ||
| Western Michigan University; | ||||||
| Series 2013, Ref. RB | 5.25% | 11/15/2030 | 400 | 456,036 | ||
| Series 2013, Ref. RB | 5.25% | 11/15/2031 | 350 | 399,063 | ||
| 28,583,422 | ||||||
| Minnesota–0.06% | ||||||
| Bethel (City of), MN (Spectrum High School); Series 2017 A, Ref. RB | 4.25% | 07/01/2047 | 425 | 445,816 | ||
| Mississippi–0.70% | ||||||
| Mississippi Business Finance Corp. (Chevron USA, Inc.); Series 2010 G, VRD RB (l) | 0.95% | 11/01/2035 | 5,000 | 5,000,000 | ||
| Missouri–1.50% | ||||||
| Kansas (City of), MO Industrial Development Authority (Downtown Redevelopment District); Series 2011 A, Ref. RB | 5.50% | 09/01/2028 | 1,970 | 2,107,388 | ||
| Kansas (City of), MO Industrial Development Authority (Kansas City International Airport); | ||||||
| Series 2019 A, RB (f) | 5.00% | 03/01/2044 | 950 | 1,136,172 | ||
| Series 2019 B, RB (f) | 5.00% | 03/01/2046 | 1,580 | 1,884,229 | ||
| Kirkwood (City of), MO Industrial Development Authority (Aberdeen Heights); Series 2017 A, Ref. RB | 5.25% | 05/15/2050 | 465 | 517,629 | ||
| Missouri (State of) Health & Educational Facilities Authority (Lutheran Senior Services); Series 2019 A, RB | 5.00% | 02/01/2034 | 330 | 374,966 | ||
| Missouri (State of) Health & Educational Facilities Authority (St. Louis College of Pharmacy); Series 2013, RB | 5.00% | 05/01/2020 | 1,000 | 1,012,320 | ||
| St. Louis (County of), MO Industrial Development Authority (Friendship Village of Sunset Hills); Series 2013 A, RB | 5.50% | 09/01/2033 | 1,375 | 1,519,966 | ||
| St. Louis (County of), MO Industrial Development Authority (Friendship Village West County); Series 2018 A, RB | 5.00% | 09/01/2038 | 1,975 | 2,221,756 | ||
| 10,774,426 | ||||||
| Nebraska–1.90% | ||||||
| Central Plains Energy Project (No. 3); Series 2012, RB (m) | 5.00% | 09/01/2032 | 5,500 | 5,958,315 | ||
| Lincoln (County of), NE Hospital Authority No. 1 (Great Plains Regional Medical Center); Series 2012, Ref. RB | 5.00% | 11/01/2032 | 2,500 | 2,639,075 | ||
| Omaha (City of), NE Public Power District; Series 2011 B, RB (c) | 5.00% | 02/01/2036 | 4,800 | 5,017,008 | ||
| 13,614,398 | ||||||
| Nevada–0.52% | ||||||
| Clark (County of), NV; Series 2013 A, Ref. RB (f) | 5.00% | 07/01/2028 | 2,000 | 2,203,000 | ||
| Clark (County of), NV (Las Vegas-McCarran International Airport); Series 2010 A, RB | 5.13% | 07/01/2034 | 1,500 | 1,504,680 | ||
| 3,707,680 | ||||||
| New Jersey–5.58% | ||||||
| Garden State Preservation Trust; Series 2005 A, RB (INS -AGM)(b) | 5.75% | 11/01/2028 | 2,485 | 3,112,885 | ||
| New Jersey (State of) Economic Development Authority; | ||||||
| Series 2005 N-1, Ref. RB (INS -NATL)(b)(c)(k) | 5.50% | 09/01/2022 | 3,555 | 3,926,782 | ||
| Series 2005, Ref. RB (INS -AMBAC)(b) | 5.50% | 09/01/2024 | 2,000 | 2,332,640 | ||
| Series 2013, RB (f) | 5.00% | 07/01/2023 | 1,750 | 1,951,775 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| New Jersey–(continued) | ||||||
| New Jersey (State of) Economic Development Authority (Provident Group-Montclair Properties LLC-Montclair State University Student Housing); Series 2010 A, RB (g)(h) | 5.75% | 06/01/2020 | $ 1,990 | $ 2,036,108 | ||
| New Jersey (State of) Economic Development Authority (The Goethals Bridge Replacement); | ||||||
| Series 2013, RB (f) | 5.50% | 01/01/2026 | 1,000 | 1,148,330 | ||
| Series 2013, RB (f) | 5.38% | 01/01/2043 | 1,000 | 1,118,610 | ||
| New Jersey (State of) Transportation Trust Fund Authority; | ||||||
| Series 1999 A, RB | 5.75% | 06/15/2020 | 2,570 | 2,628,493 | ||
| Series 2006 C, RB (INS -AGC)(b)(e) | 0.00% | 12/15/2026 | 8,435 | 7,222,216 | ||
| Series 2011 A, RB | 5.50% | 06/15/2041 | 1,000 | 1,048,680 | ||
| Series 2011 B, RB | 5.50% | 06/15/2031 | 1,005 | 1,059,722 | ||
| Series 2018 A, Ref. RB | 5.00% | 12/15/2034 | 1,000 | 1,165,660 | ||
| Series 2018 A, Ref. RN (c)(k) | 5.00% | 06/15/2029 | 1,505 | 1,761,452 | ||
| Series 2018 A, Ref. RN (c)(k) | 5.00% | 06/15/2030 | 515 | 600,001 | ||
| Series 2018 A, Ref. RN | 5.00% | 06/15/2031 | 960 | 1,115,117 | ||
| Subseries 2016 A-1, RN | 5.00% | 06/15/2028 | 935 | 1,099,233 | ||
| Salem (County of), NJ Pollution Control Financing Authority (Chambers); Series 2014 A, Ref. PCR (f) | 5.00% | 12/01/2023 | 3,645 | 3,917,500 | ||
| Tobacco Settlement Financing Corp.; Series 2018 A, Ref. RB | 5.25% | 06/01/2046 | 2,370 | 2,749,769 | ||
| 39,994,973 | ||||||
| New Mexico–0.51% | ||||||
| Farmington (City of), NM (Public Service Co. of New Mexico San Juan); Series 2010 C, Ref. PCR | 5.90% | 06/01/2040 | 2,650 | 2,708,326 | ||
| Santa Fe (City of), NM (El Castillo Retirement); Series 2019 A, RB | 5.00% | 05/15/2044 | 850 | 940,806 | ||
| 3,649,132 | ||||||
| New York–13.46% | ||||||
| Brooklyn Arena Local Development Corp. (Barclays Center); | ||||||
| Series 2009, RB (g)(h) | 6.25% | 01/15/2020 | 1,740 | 1,750,562 | ||
| Series 2009, RB (g)(h) | 6.38% | 01/15/2020 | 720 | 724,471 | ||
| Erie Tobacco Asset Securitization Corp.; Series 2005 A, RB | 5.00% | 06/01/2045 | 2,460 | 2,460,467 | ||
| Hudson Yards Infrastructure Corp.; Series 2017 A, Ref. RB (INS -AGM)(b) | 4.00% | 02/15/2047 | 3,135 | 3,454,707 | ||
| Metropolitan Transportation Authority; | ||||||
| Series 2012 F, Ref. RB | 5.00% | 11/15/2024 | 1,500 | 1,656,030 | ||
| Series 2013 A, RB | 5.00% | 11/15/2038 | 1,680 | 1,857,374 | ||
| New York & New Jersey (States of) Port Authority; Two Hundred Seventh Series 2018, Ref. RB (c)(f) | 5.00% | 09/15/2028 | 3,105 | 3,878,611 | ||
| New York (City of), NY Municipal Water Finance Authority; | ||||||
| Series 2010 FF, RB | 5.00% | 06/15/2031 | 2,400 | 2,449,752 | ||
| Series 2012 FF, RB (c) | 5.00% | 06/15/2045 | 1,000 | 1,082,150 | ||
| Series 2013 DD, RB | 5.00% | 06/15/2035 | 2,900 | 3,239,416 | ||
| Subseries 2012 A-1, VRD RB (l) | 0.98% | 06/15/2044 | 5,375 | 5,375,000 | ||
| New York (City of), NY Transitional Finance Authority; | ||||||
| Series 2013 I, RB | 5.00% | 05/01/2038 | 1,535 | 1,706,997 | ||
| Subseries 2009 A-1, RB (c) | 5.00% | 05/01/2030 | 2,533 | 2,533,000 | ||
| Subseries 2011 D-1, RB (c) | 5.00% | 11/01/2033 | 1,725 | 1,845,836 | ||
| Subseries 2012 E-1, RB (c) | 5.00% | 02/01/2037 | 7,155 | 7,678,674 | ||
| New York (Counties of), NY Tobacco Trust V; Series 2005 S-2, RB (e) | 0.00% | 06/01/2050 | 10,140 | 1,551,420 | ||
| New York (Counties of), NY Tobacco Trust VI; Subseries 2016 A-1, Ref. RB | 5.75% | 06/01/2043 | 2,995 | 3,598,253 | ||
| New York (State of) Dormitory Authority; Series 2019 A, RB | 5.00% | 10/01/2033 | 1,000 | 1,234,000 | ||
| New York (State of) Dormitory Authority (City of New York); Series 2005 A, RB (INS -AMBAC)(b) | 5.50% | 05/15/2029 | 1,805 | 2,412,473 | ||
| New York (State of) Dormitory Authority (General Purpose); | ||||||
| Series 2011 A, RB (c) | 5.00% | 03/15/2030 | 5,805 | 6,084,801 | ||
| Series 2013 A, RB | 5.00% | 02/15/2037 | 2,050 | 2,266,870 | ||
| New York (State of) Dormitory Authority (New York University); Series 1998 A, RB (INS -NATL)(b) | 5.75% | 07/01/2027 | 1,000 | 1,200,560 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| New York–(continued) | ||||||
| New York (State of) Thruway Authority; | ||||||
| Series 2011 A-1, RB (c) | 5.00% | 04/01/2029 | $ 4,860 | $ 5,107,568 | ||
| Series 2019 B, RB | 4.00% | 01/01/2045 | 1,265 | 1,415,687 | ||
| New York Liberty Development Corp. (3 World Trade Center); Series 2014, Class 1, Ref. RB (d) | 5.00% | 11/15/2044 | 4,840 | 5,347,764 | ||
| New York Liberty Development Corp. (7 World Trade Center); | ||||||
| Series 2012, Class 1, Ref. RB (c) | 5.00% | 09/15/2040 | 5,100 | 5,497,035 | ||
| Series 2012, Class 2, Ref. RB | 5.00% | 09/15/2043 | 1,770 | 1,899,352 | ||
| New York Transportation Development Corp. (American Airlines, Inc.); Series 2016, Ref. RB (f) | 5.00% | 08/01/2031 | 1,545 | 1,615,019 | ||
| New York Transportation Development Corp. (Delta Air Lines, Inc. LaGuardia Airport Terminal C&D Redevelopment); | ||||||
| Series 2018, RB (f) | 5.00% | 01/01/2031 | 3,160 | 3,787,323 | ||
| Series 2018, RB (f) | 4.00% | 01/01/2036 | 1,425 | 1,550,899 | ||
| New York Transportation Development Corp. (LaGuardia Airport Terminal B Redevelopment); | ||||||
| Series 2016 A, RB (f) | 5.00% | 07/01/2046 | 1,620 | 1,789,258 | ||
| Series 2016 A, RB (f) | 5.25% | 01/01/2050 | 2,985 | 3,322,872 | ||
| Rockland Tobacco Asset Securitization Corp.; Series 2001, RB | 5.75% | 08/15/2043 | 1,500 | 1,538,565 | ||
| Triborough Bridge and Tunnel Authority; Series 1992 Y, RB (g) | 6.13% | 01/01/2021 | 295 | 300,460 | ||
| TSASC, Inc.; Series 2016 B, Ref. RB | 5.00% | 06/01/2048 | 3,185 | 3,161,081 | ||
| 96,374,307 | ||||||
| North Carolina–4.17% | ||||||
| Charlotte (City of), NC (Charlotte Douglas International Airport); | ||||||
| Series 2017 A, RB (c) | 5.00% | 07/01/2047 | 4,000 | 4,778,400 | ||
| Series 2019, RB | 4.00% | 07/01/2044 | 640 | 724,416 | ||
| Series 2017 A, RB (c) | 5.00% | 12/20/2019 | 1,775 | 2,133,728 | ||
| North Carolina (State of) Capital Facilities Finance Agency (Duke University); Series 2015 B, Ref. RB (c) | 5.00% | 10/01/2055 | 8,820 | 10,232,788 | ||
| North Carolina (State of) Department of Transportation (I-77 HOT Lanes); | ||||||
| Series 2015, RB (f) | 5.00% | 12/31/2037 | 750 | 842,025 | ||
| Series 2015, RB (f) | 5.00% | 06/30/2054 | 1,115 | 1,233,792 | ||
| North Carolina (State of) Medical Care Commission (Duke University Health System); Series 2012 A, RB (c) | 5.00% | 06/01/2042 | 5,110 | 5,520,691 | ||
| North Carolina (State of) Turnpike Authority; | ||||||
| Series 2011, RB (c) | 5.00% | 07/01/2036 | 1,755 | 1,849,981 | ||
| Series 2011, RB (c) | 5.00% | 07/01/2041 | 2,430 | 2,556,846 | ||
| 29,872,667 | ||||||
| North Dakota–0.61% | ||||||
| Ward (County of), ND (Trinity Obligated Group); | ||||||
| Series 2017 C, RB | 5.00% | 06/01/2043 | 2,040 | 2,310,627 | ||
| Series 2017 C, RB | 5.00% | 06/01/2048 | 1,815 | 2,042,274 | ||
| 4,352,901 | ||||||
| Ohio–6.36% | ||||||
| Akron, Bath & Copley Joint Township Hospital District (Summa Health Obligated Group); Series 2016, Ref. RB | 5.25% | 11/15/2046 | 775 | 905,642 | ||
| Allen (County of), OH (Catholic Health Partners); Series 2012 A, Ref. RB | 5.00% | 05/01/2042 | 1,450 | 1,548,890 | ||
| American Municipal Power, Inc. (Combined Hydroelectric); Series 2016 A, Ref. RB | 4.00% | 02/15/2035 | 1,000 | 1,092,330 | ||
| American Municipal Power, Inc. (Greenup Hydroelectric); Series 2016 A, RB | 5.00% | 02/15/2046 | 490 | 563,647 | ||
| Buckeye Tobacco Settlement Financing Authority; | ||||||
| Series 2007 A-2, RB | 5.75% | 06/01/2034 | 235 | 235,406 | ||
| Series 2007 A-2, RB | 5.88% | 06/01/2047 | 6,955 | 6,990,818 | ||
| Cleveland (City of) & Cuyahoga (County of), OH Port Authority (Constellation Schools); Series 2014 A, Ref. RB | 6.50% | 01/01/2034 | 1,000 | 1,054,670 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Ohio–(continued) | ||||||
| Cuyahoga (County of), OH (Metrohealth System); | ||||||
| Series 2017, Ref. RB | 5.25% | 02/15/2047 | $ 2,500 | $ 2,864,100 | ||
| Series 2017, Ref. RB | 5.50% | 02/15/2052 | 1,555 | 1,805,915 | ||
| Franklin (County of), OH (First Community Village Obligated Group); Series 2013, Ref. RB | 5.25% | 07/01/2033 | 2,000 | 2,040,500 | ||
| Franklin (County of), OH (OhioHealth Corp.); Series 2011 A, RB (c) | 5.00% | 11/15/2036 | 3,390 | 3,604,485 | ||
| Gallia (County of), OH (Holzer Health System Obligated Group); Series 2012, Ref. RB | 8.00% | 07/01/2042 | 985 | 1,104,668 | ||
| Hamilton (County of), OH (Christ Hospital); Series 2012, RB | 5.50% | 06/01/2042 | 3,000 | 3,247,710 | ||
| Hamilton (County of), OH (Cincinnati Childrens Hospital); Series 2019 CC, RB | 5.00% | 11/15/2049 | 1,190 | 1,740,577 | ||
| Hamilton (County of), OH (Life Enriching Communities); Series 2016, Ref.RB | 5.00% | 01/01/2046 | 1,370 | 1,522,769 | ||
| Hancock (County of), OH (Blanchard Valley Regional Health Center); Series 2011 A, RB (g)(h) | 6.25% | 06/01/2021 | 2,470 | 2,654,954 | ||
| Lucas (County of), OH (ProMedica Healthcare System); Series 2018 A, Ref. RB | 5.25% | 11/15/2048 | 1,585 | 1,831,483 | ||
| Montgomery (County of), OH (Trousdale Foundation Properties); Series 2018 A, RB (d) | 6.00% | 04/01/2038 | 1,425 | 1,586,638 | ||
| Ohio (State of) (Portsmouth Bypass); Series 2015, RB (INS -AGM)(b)(f) | 5.00% | 12/31/2039 | 735 | 835,210 | ||
| Ohio (State of) Air Quality Development Authority (Pratt Paper LLC); Series 2017, RB (d)(f) | 4.25% | 01/15/2038 | 555 | 598,823 | ||
| Ohio (State of) Higher Educational Facility Commission (Summa Health System); | ||||||
| Series 2010, RB (g)(h) | 5.75% | 05/15/2020 | 3,055 | 3,117,322 | ||
| Series 2010, RB | 5.75% | 11/15/2040 | 1,780 | 1,812,378 | ||
| Ohio (State of) Turnpike Commission (Infrastructure); Series 2013 A, RB | 5.00% | 02/15/2028 | 2,500 | 2,781,425 | ||
| 45,540,360 | ||||||
| Oklahoma–0.48% | ||||||
| Oklahoma (State of) Development Finance Authority (OU Medicine); Series 2018 B, RB | 5.50% | 08/15/2057 | 2,055 | 2,444,607 | ||
| Oklahoma (State of) Development Finance Authority (Provident Oklahoma Education Resources, Inc.-Cross Village Student Housing); Series 2017, RB | 5.00% | 08/01/2052 | 1,785 | 1,012,988 | ||
| 3,457,595 | ||||||
| Pennsylvania–2.23% | ||||||
| Allegheny (County of), PA Hospital Development Authority (Allegheny Health Network Obligated Group Issue); Series 2018 A, Ref. RB | 5.00% | 04/01/2047 | 1,000 | 1,171,550 | ||
| Beaver (County of), PA Industrial Development Authority (FirstEnergy Nuclear Generation); Series 2006 A, Ref. PCR (h)(n) | 4.38% | 07/01/2022 | 850 | 911,625 | ||
| Pennsylvania (State of) Turnpike Commission; | ||||||
| Series 2012 A, RB | 5.00% | 12/01/2020 | 1,370 | 1,421,868 | ||
| Series 2018 B, RB | 5.25% | 12/01/2048 | 1,105 | 1,342,918 | ||
| Subseries 2010 B-2, RB (g)(h)(i) | 5.75% | 12/01/2020 | 2,850 | 2,980,131 | ||
| Subseries 2010 B-2, RB (g)(h)(i) | 6.00% | 12/01/2020 | 1,750 | 1,834,035 | ||
| Philadelphia (City of), PA; | ||||||
| Series 2017 A, RB | 5.00% | 10/01/2052 | 1,010 | 1,194,951 | ||
| Series 2017 B, Ref. RB (f) | 5.00% | 07/01/2047 | 3,595 | 4,188,139 | ||
| Philadelphia (City of), PA Industrial Development Authority (Thomas Jefferson University); Series 2017 A, Ref. RB | 5.00% | 09/01/2047 | 775 | 891,064 | ||
| 15,936,281 | ||||||
| Puerto Rico–2.32% | ||||||
| Children’s Trust Fund; | ||||||
| Series 2002, RB | 5.50% | 05/15/2039 | 3,255 | 3,312,614 | ||
| Series 2002, RB | 5.63% | 05/15/2043 | 1,405 | 1,429,869 | ||
| Series 2005 A, RB (e) | 0.00% | 05/15/2050 | 5,450 | 777,715 | ||
| Puerto Rico (Commonwealth of) Electric Power Authority; | ||||||
| Series 2007 VV, Ref. RB (INS -NATL)(b) | 5.25% | 07/01/2033 | 690 | 740,901 | ||
| Series 2007 VV, Ref. RB (INS -NATL)(b) | 5.25% | 07/01/2035 | 610 | 654,554 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Puerto Rico–(continued) | ||||||
| Puerto Rico (Commonwealth of) Highway & Transportation Authority; | ||||||
| Series 2007 N, Ref. RB (INS -AGM)(b) | 5.50% | 07/01/2029 | $ 600 | $ 686,904 | ||
| Series 2007 N, Ref. RB (INS -NATL)(b) | 5.25% | 07/01/2032 | 725 | 778,723 | ||
| Series 2007 N, Ref. RB (INS -AGC)(b) | 5.25% | 07/01/2034 | 1,135 | 1,279,962 | ||
| Puerto Rico (Commonwealth of) Public Buildings Authority; Series 2007 M-3, Ref. RB (INS -NATL)(b) | 6.00% | 07/01/2024 | 1,910 | 1,964,645 | ||
| Puerto Rico Sales Tax Financing Corp.; | ||||||
| Series 2018 A-1, RB (e) | 0.00% | 07/01/2029 | 1,355 | 1,003,743 | ||
| Series 2018 A-1, RB (e) | 0.00% | 07/01/2033 | 2,000 | 1,270,480 | ||
| Series 2018 A-1, RB | 4.50% | 07/01/2034 | 700 | 748,237 | ||
| Series 2018 A-1, RB | 4.75% | 07/01/2053 | 475 | 491,554 | ||
| Series 2019 A-2, RB | 4.33% | 07/01/2040 | 1,425 | 1,448,142 | ||
| 16,588,043 | ||||||
| South Carolina–1.68% | ||||||
| South Carolina (State of) Jobs-Economic Development Authority (Palmetto Health Alliance); Series 2013 A, Ref. RB (g)(h) | 5.25% | 08/01/2023 | 1,400 | 1,599,766 | ||
| South Carolina (State of) Ports Authority; Series 2015, RB (f)(g)(h) | 5.25% | 07/01/2025 | 4,235 | 5,106,859 | ||
| South Carolina (State of) Public Service Authority; Series 2014, Ref. RB | 5.00% | 12/01/2046 | 1,120 | 1,259,362 | ||
| South Carolina (State of) Public Service Authority (Santee Cooper Revenue Obligations); Series 2013 E, RB | 5.50% | 12/01/2053 | 3,595 | 4,036,107 | ||
| 12,002,094 | ||||||
| South Dakota–0.21% | ||||||
| South Dakota (State of) Health & Educational Facilities Authority (Sanford Obligated Group); Series 2015, Ref. RB | 5.00% | 11/01/2045 | 1,315 | 1,492,144 | ||
| Tennessee–0.71% | ||||||
| Greeneville (Town of), TN Health & Educational Facilities Board (Ballad Health); Series 2018 A, Ref. RB | 5.00% | 07/01/2036 | 1,785 | 2,129,237 | ||
| Tennessee Energy Acquisition Corp.; | ||||||
| Series 2006 A, RB | 5.25% | 09/01/2023 | 1,280 | 1,440,231 | ||
| Series 2006 A, RB | 5.25% | 09/01/2026 | 1,275 | 1,524,543 | ||
| 5,094,011 | ||||||
| Texas–16.83% | ||||||
| Alamo Community College District; Series 2012, Ref. GO Bonds (c) | 5.00% | 08/15/2034 | 5,105 | 5,594,621 | ||
| Austin (City of), TX; Series 2019 B, RB (f) | 5.00% | 11/15/2044 | 2,500 | 3,041,825 | ||
| Bexar County Health Facilities Development Corp. (Army Retirement Residence); Series 2010, RB (g)(h) | 6.20% | 07/01/2020 | 2,225 | 2,288,835 | ||
| Clifton Higher Education Finance Corp. (International Leadership of Texas); Series 2018 D, RB | 5.75% | 08/15/2033 | 1,580 | 1,763,027 | ||
| Dallas-Fort Worth (Cities of), TX International Airport; Series 2014 A, Ref. RB (f) | 5.25% | 11/01/2026 | 2,000 | 2,281,860 | ||
| Grand Parkway Transportation Corp.; Series 2013 A, RB | 5.50% | 04/01/2053 | 1,000 | 1,121,930 | ||
| Gulf Coast Industrial Development Authority (ExxonMobil); Series 2012, VRD RB (l) | 0.85% | 11/01/2041 | 1,200 | 1,200,000 | ||
| Harris (County of), TX; Series 2007 C, Ref. GO Bonds (INS -AGM)(b) | 5.25% | 08/15/2031 | 5,395 | 7,387,373 | ||
| Harris County Industrial Development Corp. (Deer Park Refining Limited Partnership); Series 2006, RB (g)(h) | 5.00% | 12/01/2019 | 1,300 | 1,300,000 | ||
| Houston (City of), TX; | ||||||
| Series 2011 D, RB (c) | 5.00% | 11/15/2033 | 2,700 | 2,904,228 | ||
| Series 2011 D, RB (c) | 5.00% | 11/15/2036 | 4,005 | 4,307,938 | ||
| Houston (City of), TX Airport System (United Airlines, Inc. Airport Improvement); Series 2015 C, Ref. RB (f) | 5.00% | 07/15/2020 | 775 | 791,283 | ||
| Houston (City of), TX Airport System (United Airlines, Inc. Terminal E); Series 2014, Ref. RB (f) | 4.75% | 07/01/2024 | 500 | 542,910 | ||
| Houston (City of), TX Convention & Entertainment Facilities Department; Series 2001 B, RB (INS -AGM)(b)(e) | 0.00% | 09/01/2025 | 4,650 | 4,219,363 | ||
| La Vernia Higher Education Finance Corp. (Meridian World School); Series 2015 A, RB (d) | 5.50% | 08/15/2045 | 1,205 | 1,304,196 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Texas–(continued) | ||||||
| Lower Colorado River Authority; | ||||||
| Series 2012 A, Ref. RB (g)(h) | 5.00% | 05/15/2022 | $ 5 | $ 5,454 | ||
| Series 2012 A, Ref. RB | 5.00% | 05/15/2030 | 2,125 | 2,305,838 | ||
| Lower Colorado River Authority (LCRA Transmission Services Corp.); Series 2011 A, Ref. RB | 5.00% | 05/15/2041 | 2,250 | 2,362,388 | ||
| Lower Neches Valley Authority Industrial Development Corp. (Exxonmobil ); Series 2010, VRD RB (l) | 1.00% | 11/01/2038 | 990 | 990,000 | ||
| New Hope Cultural Education Facilities Corp. (Presbyterian Village North); | ||||||
| Series 2018, Ref. RB | 5.00% | 10/01/2032 | 205 | 228,528 | ||
| Series 2018, Ref. RB | 5.00% | 10/01/2033 | 1,280 | 1,423,283 | ||
| New Hope Cultural Education Facilities Finance Corp. (4-K Housing, Inc.-Stoney Brook); Series 2017 A-1, RB | 4.75% | 07/01/2052 | 750 | 772,095 | ||
| New Hope Cultural Education Facilities Finance Corp. (CHF-Collegiate Housing College Station I, LLC-Texas A&M University); Series 2014 A, RB (INS -AGM)(b) | 5.00% | 04/01/2046 | 1,900 | 2,099,348 | ||
| New Hope Cultural Education Facilities Finance Corp. (Collegiate Housing - Tarleton State University); Series 2014 A, RB | 5.00% | 04/01/2034 | 1,000 | 1,080,610 | ||
| New Hope Cultural Education Facilities Finance Corp. (Morningside Ministries); Series 2013, RB | 6.50% | 01/01/2043 | 1,000 | 1,092,280 | ||
| North Texas Tollway Authority; | ||||||
| Series 2008 D, Ref. RB (INS -AGC)(b)(e) | 0.00% | 01/01/2028 | 18,900 | 16,149,105 | ||
| Series 2008 D, Ref. RB (INS -AGC)(b)(e) | 0.00% | 01/01/2031 | 3,740 | 2,895,583 | ||
| SA Energy Acquisition Public Facility Corp.; Series 2007, RB | 5.50% | 08/01/2021 | 1,500 | 1,595,340 | ||
| San Antonio (City of), TX; Series 2013, RB | 5.00% | 02/01/2038 | 2,495 | 2,789,635 | ||
| Tarrant County Cultural Education Facilities Finance Corp.; Series 2016 A, Ref. RB (c) | 5.00% | 02/15/2047 | 3,260 | 3,793,401 | ||
| Tarrant County Cultural Education Facilities Finance Corp. (Air Force Village Obligated Group); | ||||||
| Series 2016, Ref. RB | 5.00% | 05/15/2037 | 1,395 | 1,520,759 | ||
| Series 2016, Ref. RB | 5.00% | 05/15/2045 | 1,850 | 1,995,114 | ||
| Tarrant County Cultural Education Facilities Finance Corp. (C.C. Young Memorial Home); Series 2017A, RB | 6.38% | 02/15/2048 | 1,765 | 1,956,167 | ||
| Tarrant County Cultural Education Facilities Finance Corp. (Texas Health Resources System); Series 2016 A, Ref. RB | 5.00% | 02/15/2041 | 3,900 | 4,581,798 | ||
| Temple (City of), TX; Series 2018 A, RB (d) | 5.00% | 08/01/2028 | 705 | 789,325 | ||
| Texas (State of) Transportation Commission; | ||||||
| Series 2016 A, GO Bonds | 5.00% | 04/01/2044 | 1,555 | 1,822,631 | ||
| Series 2019, RB (e) | 0.00% | 08/01/2041 | 2,000 | 812,220 | ||
| Texas (State of) Transportation Commission (Central Texas Turnpike System); | ||||||
| Series 2015 B, Ref. RB (e) | 0.00% | 08/15/2036 | 3,170 | 1,655,469 | ||
| Series 2015 B, Ref. RB (e) | 0.00% | 08/15/2037 | 970 | 483,273 | ||
| Series 2015 C, Ref. RB | 5.00% | 08/15/2042 | 3,835 | 4,336,771 | ||
| Texas Municipal Gas Acquisition & Supply Corp. I; Series 2008 D, RB | 6.25% | 12/15/2026 | 4,445 | 5,173,091 | ||
| Texas Municipal Gas Acquisition & Supply Corp. III; | ||||||
| Series 2012, RB | 5.00% | 12/15/2028 | 4,095 | 4,458,349 | ||
| Series 2012, RB | 5.00% | 12/15/2029 | 2,000 | 2,173,160 | ||
| Series 2012, RB | 5.00% | 12/15/2031 | 1,200 | 1,300,320 | ||
| Series 2012, RB | 5.00% | 12/15/2032 | 1,195 | 1,292,966 | ||
| Texas Private Activity Bond Surface Transportation Corp. (Blueridge Transportation Group, LLC SH 288 Toll Lanes); Series 2016, RB (f) | 5.00% | 12/31/2055 | 1,050 | 1,168,923 | ||
| Texas Private Activity Bond Surface Transportation Corp. (NTE Mobility Partners LLC North Tarrant Express Management Lanes); Series 2009, RB | 6.88% | 12/31/2039 | 1,945 | 1,953,714 | ||
| Texas Private Activity Bond Surface Transportation Corp. (NTE Mobility Partners Segments 3 LLC Segments 3A and 3B Facility); Series 2013, RB (f) | 7.00% | 12/31/2038 | 1,300 | 1,521,013 | ||
| Travis County Cultural Education Facilities Finance Corp. (Wayside Schools); Series 2012 A, RB | 5.25% | 08/15/2042 | 515 | 531,099 | ||
| University of Houston; Series 2008, Ref. RB (INS -AGM)(b)(c) | 5.00% | 02/15/2033 | 1,326 | 1,329,739 | ||
| 120,488,178 | ||||||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Utah–0.94% | ||||||
| Salt Lake (City of), UT; | ||||||
| Series 2017 A, RB (c)(f) | 5.00% | 07/01/2047 | $ 2,490 | $ 2,904,560 | ||
| Series 2018 A, RB (f) | 5.00% | 07/01/2048 | 1,230 | 1,455,742 | ||
| Series 2018 A, RB (f) | 5.25% | 07/01/2048 | 1,635 | 1,973,298 | ||
| Salt Lake (City of), UT (IHC Hospitals, Inc.); Series 1991, Ref. RB (g)(o) | 11.28% | 05/15/2020 | 400 | 412,288 | ||
| 6,745,888 | ||||||
| Virgin Islands–0.34% | ||||||
| Virgin Islands (Government of) Public Finance Authority (Matching Fund Loan Note); | ||||||
| Series 2010 A, RB | 5.00% | 10/01/2025 | 540 | 543,418 | ||
| Series 2010 A, RB | 5.00% | 10/01/2029 | 1,860 | 1,868,147 | ||
| 2,411,565 | ||||||
| Virginia–1.59% | ||||||
| Virginia (State of) Small Business Financing Authority (Elizabeth River Crossings Opco, LLC); | ||||||
| Series 2012, RB (f) | 6.00% | 01/01/2037 | 725 | 801,161 | ||
| Series 2012, RB (f) | 5.50% | 01/01/2042 | 2,930 | 3,183,269 | ||
| Virginia (State of) Small Business Financing Authority (Express Lanes, LLC); | ||||||
| Series 2012, RB (f) | 5.00% | 07/01/2034 | 3,780 | 4,032,731 | ||
| Series 2012, RB (f) | 5.00% | 01/01/2040 | 1,905 | 2,026,330 | ||
| Virginia (State of) Small Business Financing Authority (Transform 66 P3); Series 2017, RB (f) | 5.00% | 12/31/2056 | 1,170 | 1,332,583 | ||
| 11,376,074 | ||||||
| Washington–2.79% | ||||||
| Chelan (County of), WA Public Utility District No. 1; Series 2011 A, Ref. RB (f) | 5.50% | 07/01/2025 | 925 | 983,599 | ||
| Kalispel Tribe of Indians; Series 2018 B, RB (d) | 5.25% | 01/01/2038 | 1,000 | 1,134,220 | ||
| Seattle (Port of), WA; Series 2019, RB (f) | 5.00% | 04/01/2044 | 1,475 | 1,767,537 | ||
| Washington (State of); Series 2019 A, GO Bonds (c) | 5.00% | 08/01/2042 | 1,770 | 2,167,772 | ||
| Washington (State of) Convention Center Public Facilities District; | ||||||
| Series 2018, RB | 5.00% | 07/01/2043 | 1,105 | 1,330,696 | ||
| Series 2018, RB (c) | 5.00% | 07/01/2048 | 3,955 | 4,727,886 | ||
| Series 2018, RB | 5.00% | 07/01/2048 | 790 | 930,999 | ||
| Washington (State of) Health Care Facilities Authority; Series 2019 A-2, Ref. RB (d) | 11.55% | 08/01/2044 | 1,145 | 1,757,243 | ||
| Washington (State of) Health Care Facilities Authority (Catholic Health Initiatives); Series 2011 A, RB (c) | 5.00% | 02/01/2041 | 3,000 | 3,130,290 | ||
| Washington (State of) Tobacco Settlement Authority; Series 2013, Ref. RB | 5.25% | 06/01/2031 | 2,000 | 2,033,580 | ||
| 19,963,822 | ||||||
| Wisconsin–3.02% | ||||||
| Public Finance Authority (American Dream at Meadowlands); | ||||||
| Series 2017, RB (d) | 6.75% | 08/01/2031 | 865 | 1,030,466 | ||
| Series 2017, RB (d) | 6.75% | 12/01/2042 | 2,015 | 2,383,402 | ||
| Public Finance Authority (KU Campus Development Corp.); Series 2016, RB (c) | 5.00% | 03/01/2046 | 3,375 | 3,858,064 | ||
| Public Finance Authority (Mallard Creek Stem Academy); Series 2019 A, RB (d) | 5.13% | 06/15/2039 | 620 | 636,417 | ||
| Wisconsin (State of) Health & Educational Facilities Authority (Ascension Health Alliance); Series 2013, RB | 4.00% | 11/15/2043 | 2,250 | 2,480,130 | ||
| Wisconsin (State of) Health & Educational Facilities Authority (Mercy Alliance); Series 2012, RB | 5.00% | 06/01/2039 | 3,500 | 3,711,575 | ||
| Wisconsin (State of) Health & Educational Facilities Authority (Mile Bluff Medical Center, Inc.); | ||||||
| Series 2014, RB | 5.00% | 05/01/2026 | 1,100 | 1,190,376 | ||
| Series 2014, RB | 5.13% | 05/01/2029 | 1,000 | 1,079,520 | ||
| Wisconsin (State of) Public Finance Authority (Maryland Proton Treatment Center); Series 2018 A-1, RB (d) | 6.38% | 01/01/2048 | 615 | 640,283 | ||
| Interest Rate | Maturity Date | Principal Amount (000) | Value | |||
| Wisconsin–(continued) | ||||||
| Wisconsin (State of) Public Finance Authority (Prime Healthcare Foundation, Inc.); | ||||||
| Series 2018 A, RB | 5.20% | 12/01/2037 | $ 1,585 | $ 1,854,910 | ||
| Series 2018 A, RB | 5.35% | 12/01/2045 | 1,585 | 1,850,091 | ||
| Wisconsin (State of) Public Finance Authority (Roseman University of Health Sciences); Series 2015, Ref. RB | 5.75% | 04/01/2035 | 795 | 891,060 | ||
| 21,606,294 | ||||||
| Wyoming–0.33% | ||||||
| Wyoming (State of) Municipal Power Agency; Series 2017 A, Ref. RB (INS -BAM)(b)(c) | 5.00% | 01/01/2047 | 2,020 | 2,353,441 | ||
| TOTAL INVESTMENTS IN SECURITIES(p)–157.05% (Cost $1,029,157,717) | 1,124,618,642 | |||||
| FLOATING RATE NOTE OBLIGATIONS–(24.86)% | ||||||
| Notes with interest and fee rates ranging from 1.58% to 2.02% at 11/30/2019 and contractual maturities of collateral ranging from 09/01/2022 to 04/01/2056(q) | (178,000,000) | |||||
| VARIABLE RATE MUNI TERM PREFERRED SHARES–(32.66)% | (233,875,657) | |||||
| OTHER ASSETS LESS LIABILITIES–0.47% | 3,364,738 | |||||
| NET ASSETS APPLICABLE TO COMMON SHARES–100.00% | $716,107,723 | |||||
| AGC | – Assured Guaranty Corp. |
| AGM | – Assured Guaranty Municipal Corp. |
| AMBAC | – American Municipal Bond Assurance Corp. |
| BAM | – Build America Mutual Assurance Co. |
| COP | – Certificates of Participation |
| GO | – General Obligation |
| IDR | – Industrial Development Revenue Bonds |
| INS | – Insurer |
| NATL | – National Public Finance Guarantee Corp. |
| PCR | – Pollution Control Revenue Bonds |
| RB | – Revenue Bonds |
| Ref. | – Refunding |
| RN | – Revenue Notes |
| SIFMA | – Securities Industry and Financial Markets Association |
| VRD | – Variable Rate Demand |
| Wts. | – Warrants |
| (a) | Calculated as a percentage of net assets. Amounts in excess of 100% are due to the Trust’s use of leverage. |
| (b) | Principal and/or interest payments are secured by the bond insurance company listed. |
| (c) | Underlying security related to TOB Trusts entered into by the Trust. |
| (d) | Security purchased or received in a transaction exempt from registration under the Securities Act of 1933, as amended (the “1933 Act”). The security may be resold pursuant to an exemption from registration under the 1933 Act, typically to qualified institutional buyers. The aggregate value of these securities at November 30, 2019 was $37,726,976, which represented 5.27% of the Trust’s Net Assets. |
| (e) | Zero coupon bond issued at a discount. |
| (f) | Security subject to the alternative minimum tax. |
| (g) | Advance refunded; secured by an escrow fund of U.S. Government obligations or other highly rated collateral. |
| (h) | Security has an irrevocable call by the issuer or mandatory put by the holder. Maturity date reflects such call or put. |
| (i) | Convertible capital appreciation bond. The interest rate shown represents the coupon rate at which the bond will accrue at a specified future date. |
| (j) | Interest or dividend rate is redetermined periodically. Rate shown is the rate in effect on November 30, 2019. |
| (k) | Security is subject to a reimbursement agreement which may require the Trust to pay amounts to a counterparty in the event of a significant decline in the market value of the security underlying the TOB Trusts. In case of a shortfall, the maximum potential amount of payments the Trust could ultimately be required to make under the agreement is $11,662,000. However, such shortfall payment would be reduced by the proceeds from the sale of the security underlying the TOB Trusts. |
| (l) | Demand security payable upon demand by the Trust at specified time intervals no greater than thirteen months. Interest rate is redetermined periodically by the issuer or agent based on current market conditions. Rate shown is the rate in effect on November 30, 2019. |
| (m) | Security subject to crossover refunding. |
| (n) | Defaulted security. Currently, the issuer is in default with respect to principal and/or interest payments. The value of this security at November 30, 2019 represented less than 1% of the Trust’s Net Assets. |
| (o) | Current coupon rate for inverse floating rate municipal obligations. This rate resets periodically as the rate on the related security changes. Positions in inverse floating rate municipal obligations have a total value of $412,288, which represented less than 1% of the Trust’s Net Assets. |
| (p) | Entities may either issue, guarantee, back or otherwise enhance the credit quality of a security. The entities are not primarily responsible for the issuer’s obligation but may be called upon to satisfy issuer’s obligations. No concentration of any single entity was greater than 5% each. |
| (q) | Floating rate note obligations related to securities held. The interest and fee rates shown reflect the rates in effect at November 30, 2019. At November 30, 2019, the Trust’s investments with a value of $270,463,983 are held by TOB Trusts and serve as collateral for the $178,000,000 in the floating rate note obligations outstanding at that date. |