BlackRock Municipal Bond Trust

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number: 811-21036

Name of Fund: BlackRock Municipal Bond Trust (BBK)

Fund Address:  100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock Municipal Bond Trust, 55 East 52nd Street, New York, NY 10055

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 08/31/2018

Date of reporting period: 05/31/2018


Item 1 – Schedule of Investments

 


Schedule of Investments  (unaudited)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  

Municipal Bonds — 137.5%

 

Alabama — 0.6%  

Opelika Utilities Board, Refunding RB, 4.00%, 06/01/41

  $ 960     $ 998,256  
   

 

 

 
Arizona — 7.5%  

Arizona Health Facilities Authority, Refunding RB, Phoenix Children’s Hospital, Series A, 5.00%, 02/01/42

    2,200       2,326,236  

City of Phoenix Arizona IDA, Refunding RB, Basis Schools, Inc. Projects, 5.00%, 07/01/45(a)

    460       472,388  

County of Pinal Arizona Electric District No.3, Refunding RB:

   

4.75%, 07/01/21(b)

    680       737,188  

4.75%, 07/01/31

    3,070       3,261,936  

Salt Verde Financial Corp., RB, Senior:

   

5.00%, 12/01/32

    1,500       1,770,930  

5.00%, 12/01/37

    2,065       2,467,448  

University Medical Center Corp., RB, 6.50%, 07/01/19(b)

    500       524,625  

University Medical Center Corp., Refunding RB, 6.00%, 07/01/21(b)

    900       1,004,832  
   

 

 

 
      12,565,583  
Arkansas — 2.3%  

City of Benton Arkansas, RB, 4.00%, 06/01/39

    505       526,028  

City of Fort Smith Arkansas Water & Sewer Revenue, Refunding RB, 4.00%, 10/01/40

    840       869,644  

City of Little Rock Arkansas, RB, 4.00%, 07/01/41

    1,835       1,889,848  

County of Pulaski Arkansas Public Facilities Board, RB, 5.00%, 12/01/42

    465       510,282  
   

 

 

 
      3,795,802  
California — 21.4%  

California Health Facilities Financing Authority, RB, Sutter Health:

   

Series A, 5.00%, 11/15/48

    1,050       1,215,081  

Series B, 5.88%, 08/15/20(b)

    1,900       2,072,463  

Carlsbad California Unified School District, GO, Election of 2006, Series B, 0.00%, 05/01/34(c)

    1,000       1,156,410  

City & County of San Francisco Public Utilities Commission Wastewater Revenue, Refunding RB, Sewer System, Series B, 4.00%, 10/01/42

    500       518,270  

City of San Jose California, Refunding ARB, Norman Y Mineta San Jose International Airport SJC, Series A-1, AMT, 5.75%, 03/01/34

    2,000       2,175,560  
Security   Par
(000)
    Value  
California (continued)  

County of San Diego Regional Airport Authority, ARB, Subordinate, Series B, AMT, 5.00%, 07/01/47

  $ 2,405     $ 2,727,366  

Hartnell Community College District California, GO, CAB, Election of 2002, Series D,
0.00%, 08/01/34(c)

    1,650       1,738,374  

Norwalk-La Mirada Unified School District, GO, Refunding, CAB, Election of 2002, Series E (AGC),
0.00%, 08/01/38(d)

    8,000       3,525,120  

Palomar Community College District, GO, CAB, Election of 2006, Series B:

   

0.00%, 08/01/30(d)

    1,500       1,049,400  

0.00%, 08/01/33(d)

    4,000       1,631,040  

0.00%, 08/01/39(c)

    2,605       2,608,569  

San Diego Community College District, GO, CAB, Election of 2002, 0.00%, 08/01/33(c)

    2,800       3,298,652  

State of California, GO, Refunding, Various Purposes, 5.00%, 02/01/38

    3,000       3,338,940  

State of California, GO, Various Purposes:

   

6.50%, 04/01/19 (b)

    1,055       1,098,508  

5.75%, 04/01/31

    2,000       2,066,700  

6.00%, 03/01/33

    1,000       1,073,450  

6.50%, 04/01/33

    895       930,469  

5.50%, 03/01/40

    2,350       2,496,687  

Visalia Unified School District, COP (AGM), 4.00%, 05/01/48

    1,225       1,234,335  
   

 

 

 
      35,955,394  
Colorado — 0.6%  

Colorado Health Facilities Authority, RB, Catholic Health Initiatives, Series D, 6.25%, 10/01/33

    1,070       1,087,056  
   

 

 

 
Connecticut — 0.3%  

Connecticut State Health & Educational Facility Authority, Refunding RB, Lawrence & Memorial Hospital, Series F, 5.00%, 07/01/36

    550       581,240  
   

 

 

 
Delaware — 2.2%  

County of Kent Delaware, RB, CHF-Dover, LLC-Delaware State University Project, Series A:

   

5.00%, 07/01/40

    330       361,251  

5.00%, 07/01/48

    900       979,200  

County of Sussex Delaware, RB, NRG Energy, Inc., Indian River Power LLC Project, 6.00%, 10/01/40

    1,200       1,268,100  
 

 

 

     1  


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
Delaware (continued)  

Delaware Transportation Authority, RB, U.S. 301 Project, 5.00%, 06/01/55

  $ 950     $ 1,051,346  
   

 

 

 
      3,659,897  
Florida — 5.0%  

Capital Trust Agency Inc., RB, M/F Housing, The Gardens Apartment Project, Series A, 4.75%, 07/01/40

    600       626,724  

County of Miami-Dade Florida, RB, AMT, Seaport Department, Series B, 6.00%, 10/01/31

    4,135       4,723,618  

County of Orange Florida Health Facilities Authority, Refunding RB, Mayflower Retirement Center, 5.00%, 06/01/36

    125       131,261  

Greater Orlando Aviation Authority, ARB, Sub-Series A, AMT, 5.00%, 10/01/35

    2,000       2,277,800  

Stevens Plantation Community Development District, RB, Special Assessment, Series A, 7.10%, 05/01/35(e)(f)

    860       602,000  
   

 

 

 
      8,361,403  
Georgia — 0.7%  

County of Dalton Whitfield Joint Development Authority, RB, Hamilton Health Care System Obligation, 4.00%, 08/15/48

    705       726,136  

County of Georgia Housing & Finance Authority, RB, S/F, Series A:

   

3.95%, 12/01/43

    295       298,788  

4.00%, 12/01/48

    210       212,213  
   

 

 

 
      1,237,137  
Hawaii — 0.3%  

State of Hawaii Department of Budget & Finance, Refunding RB, Special Purpose, Senior Living, Kahala Nui, 5.25%, 11/15/37

    400       442,292  
   

 

 

 
Idaho — 0.3%  

Idaho Health Facilities Authority, RB, St. Lukes Health System Project, Series A, 5.00%, 03/01/39

    500       541,385  
   

 

 

 
Illinois — 5.8%  

Chicago Board of Education, GO, Series H, 5.00%, 12/01/36

    235       241,434  

Chicago Board of Education, GO, Refunding, Dedicated Revenues:

   

Series C, 5.00%, 12/01/34

    235       240,891  

Series F, 5.00%, 12/01/23

    310       323,904  
Security   Par
(000)
    Value  
Illinois (continued)  

Chicago Board of Education, GO, Refunding Series C, 5.00%, 12/01/25

  $ 425     $ 442,225  

City of Chicago Illinois, Refunding ARB, O’Hare International Airport Passenger Facility Charge, Series B, AMT, 4.00%, 01/01/29

    1,600       1,644,512  

City of Chicago Illinois Midway International Airport, Refunding GARB, 2nd Lien, Series A, AMT, 5.00%, 01/01/41

    870       944,272  

City of Chicago Illinois Transit Authority, RB, Sales Tax Receipts, 5.25%, 12/01/40

    665       711,517  

Illinois Finance Authority, RB, Chicago LLC, University of Illinois at Chicago Project, Series A:

   

5.00%, 02/15/37

    300       329,418  

5.00%, 02/15/47

    205       223,102  

5.00%, 02/15/50

    100       108,427  

Illinois Finance Authority, Refunding RB:

   

OSF Health Care System, Series A, 5.00%, 11/15/45

    1,205       1,315,968  

OSF Healthcare System, 6.00%, 05/15/39

    205       218,481  

Roosevelt University Project, 6.50%, 10/01/19(b)

    395       418,704  

Roosevelt University Project, 6.50%, 04/01/44

    605       632,679  

Railsplitter Tobacco Settlement Authority, RB, 6.00%, 06/01/21(b)

    1,150       1,282,583  

State of Illinois, GO, Series D, 5.00%, 11/01/28

    645       688,357  
   

 

 

 
      9,766,474  
Iowa — 0.2%  

Iowa Finance Authority, Refunding RB, Iowa Fertilizer Co. Project, Series B, 5.25%, 12/01/50(g)

    250       265,548  
   

 

 

 
Kansas — 2.7%  

County of Seward Kansas Unified School District No. 480 Liberal, GO, Refunding:

   

5.00%, 09/01/22(b)

    3,280       3,669,664  

5.00%, 09/01/39

    720       797,191  
   

 

 

 
      4,466,855  
Kentucky — 3.7%  

County of Boyle Kentucky, Refunding RB, Centre College of Kentucky, 5.00%, 06/01/37

    2,500       2,785,100  
 

 

 

2   


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
Kentucky (continued)  

Kentucky Economic Development Finance Authority, RB, Catholic Health Initiatives, Series A, 5.38%, 01/01/40

  $ 1,830     $ 1,973,033  

Kentucky Public Transportation Infrastructure Authority, RB, Downtown Crossing Project, Convertible CAB, 1st Tier, Series C(c):

   

0.00%, 07/01/34

    500       473,200  

0.00%, 07/01/39

    830       778,158  

0.00%, 07/01/43

    270       253,044  
   

 

 

 
      6,262,535  
Louisiana — 1.5%  

City of Alexandria Louisiana Utilities, RB, 5.00%, 05/01/39

    860       950,997  

Louisiana Local Government Environmental Facilities & Community Development Authority, RB, Westlake Chemical Corp. Project, Series A-1, 6.50%, 11/01/35

    1,050       1,155,315  

Louisiana Public Facilities Authority, RB, Belle Chasse Educational Foundation Project, 6.50%, 05/01/31

    400       425,372  
   

 

 

 
      2,531,684  
Maryland — 0.2%  

County of Anne Arundel Maryland Consolidated, RB, Special Taxing District, Villages at Two Rivers Project:

   

5.13%, 07/01/36

    170       172,606  

5.25%, 07/01/44

    170       172,382  
   

 

 

 
      344,988  
Massachusetts — 2.9%  

Massachusetts Development Finance Agency, RB, Emerson College Issue:

   

Series A, 5.00%, 01/01/47

    630       688,237  

5.00%, 01/01/48

    1,115       1,227,169  

Series A, 5.25%, 01/01/42

    565       629,709  

Massachusetts Development Finance Agency, Refunding RB:

   

Emmanuel College Issue, Series A, 5.00%, 10/01/43

    750       814,793  

International Charter School, 5.00%, 04/15/40

    400       426,008  
Security   Par
(000)
    Value  
Massachusetts (continued)  

Massachusetts Development Finance Agency, Refunding RB (continued):

   

Wellesley College Issue, Series L, 4.00%, 07/01/44

  $ 970     $ 1,019,276  
   

 

 

 
      4,805,192  
Michigan — 5.2%  

Michigan Finance Authority, RB, Detroit Water & Sewage Disposal System, Senior Lien, Series 2014 C-2, AMT, 5.00%, 07/01/44

    240       257,611  

Michigan Finance Authority, Refunding RB, Henry Ford Health System, 5.00%, 11/15/41

    5,560       6,221,307  

Michigan State Hospital Finance Authority, Refunding RB, Trinity Health Credit Group, Series C, 4.00%, 12/01/32

    2,100       2,161,677  

State of Michigan Building Authority, Refunding RB, Facilities Program, Series I, 6.25%, 10/15/38

    40       40,653  
   

 

 

 
      8,681,248  
Minnesota — 4.0%  

City of Maple Grove Minnesota, Refunding RB, Maple Grove Hospital, Corp., 4.00%, 05/01/37

    880       895,840  

City of Minneapolis Minnesota, Refunding RB, Fairview Health Services, Series B (AGC), 6.50%, 11/15/38

    3,890       3,975,074  

Minneapolis-St. Paul Metropolitan Airports Commission, Refunding ARB, Sub Series D, AMT, 5.00%, 01/01/41

    290       325,400  

Minnesota Higher Education Facilities Authority, RB:

   

Augsburg College, Series B, 4.25%, 05/01/40

    1,075       1,075,022  

College of St. Benedict, Series 8-K, 4.00%, 03/01/43

    385       389,589  
   

 

 

 
      6,660,925  
Mississippi — 1.9%  

County of Warren Mississippi, RB, Gulf Opportunity Zone Bonds, International Paper Co. Project, Series A, 5.38%, 12/01/35

    400       442,744  

Mississippi Development Bank, RB, Special Obligation:

   

CAB, Hinds Community College District (AGM), 5.00%, 04/01/21 (b)

    845       916,453  
 

 

 

     3  


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
Mississippi (continued)  

Mississippi Development Bank, RB, Special Obligation (continued):

   

County of Jackson Limited Tax Note (AGC), 5.50%, 07/01/32

  $ 1,750     $ 1,818,215  
   

 

 

 
      3,177,412  
Missouri — 2.6%  

Missouri Development Finance Board, RB, Annual Appropriation Sewer System, Series B, 5.00%, 11/01/41

    900       968,778  

Missouri State Health & Educational Facilities Authority, RB:

   

A.T. Still University of Health Sciences, 5.25%, 10/01/31

    500       544,425  

A.T. Still University of Health Sciences, 4.25%, 10/01/32

    320       334,563  

A.T. Still University of Health Sciences, 5.00%, 10/01/39

    500       548,080  

Heartland Regional Medical Center, 4.13%, 02/15/43

    300       307,800  

University of Central Missouri, Series C-2, 5.00%, 10/01/34

    1,000       1,110,710  

Missouri State Health & Educational Facilities Authority, Refunding RB, Kansas City University of Medicine and Biosciences, Series A, 5.00%, 06/01/42

    540       607,786  
   

 

 

 
      4,422,142  
Nebraska — 1.1%  

Central Plains Nebraska Energy Project, RB, Gas Project No. 3, 5.00%, 09/01/42

    600       656,190  

County of Douglas Nebraska Hospital Authority No. 3, Refunding RB, Health Facilities Nebraska Methodist Health System, 5.00%, 11/01/45

    400       439,940  

Nebraska Public Power District, Refunding RB, Series A:

   

5.00%, 01/01/32

    250       271,510  

4.00%, 01/01/44

    400       408,548  
   

 

 

 
      1,776,188  
Nevada — 1.1%  

City of Las Vegas Nevada, RB, Special Assessment, No. 809 Summerlin Area, 5.65%, 06/01/23

    820       832,111  
Security   Par
(000)
    Value  
Nevada (continued)  

County of Clark Nevada, Refunding ARB, Department of Aviation, Subordinate Lien, Series A-2, 4.25%, 07/01/36

  $ 1,000     $ 1,047,400  
   

 

 

 
      1,879,511  
New Jersey — 14.5%  

New Jersey EDA, RB:

   

Continental Airlines, Inc. Project, Series B, AMT, 5.63%, 11/15/30

    660       748,202  

Goethals Bridge Replacement Project (AGM), AMT, 5.13%, 07/01/42

    200       219,082  

School Facilities Construction, Series UU, 5.00%, 06/15/40

    425       447,801  

New Jersey EDA, Refunding RB:

   

Series B, 5.50%, 06/15/30

    2,500       2,858,050  

Special Assessment, Kapkowski Road Landfill Project, 6.50%, 04/01/28

    7,500       8,787,375  

New Jersey Health Care Facilities Financing Authority, Refunding RB:

   

Hospital Asset Transfer Program, 5.00%, 10/01/37

    685       741,903  

St. Barnabas Health Care System, Series A, 4.63%, 07/01/21(b)

    510       550,203  

St. Barnabas Health Care System, Series A, 5.63%, 07/01/21(b)

    1,700       1,884,484  

St. Barnabas Health Care System, Series A, 5.00%, 07/01/25

    500       551,195  

New Jersey State Turnpike Authority, RB, Series E, 5.00%, 01/01/45

    1,860       2,069,883  

New Jersey Transportation Trust Fund Authority, RB:

   

CAB, Transportation System, Series A,
0.00%, 12/15/35(d)

    1,000       449,790  

Transportation Program, Series AA,
5.00%, 06/15/45

    900       949,032  

Transportation Program, Series AA,
5.00%, 06/15/46

    400       421,540  

South Jersey Port Corp., RB, Marine Terminal, Series B, AMT, 5.00%, 01/01/35

    625       685,238  

Tobacco Settlement Financing Corp., Refunding RB, Series A:

   

5.00%, 06/01/36

    750       842,145  
 

 

 

4   


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
New Jersey (continued)  

Tobacco Settlement Financing Corp., Refunding RB, Series A (continued):

   

5.25%, 06/01/46

  $ 1,810     $ 2,034,512  
   

 

 

 
      24,240,435  
New Mexico — 0.3%  

New Mexico Hospital Equipment Loan Council, Refunding RB, Presbyterian Healthcare Services, 5.00%, 08/01/44

    450       502,655  
   

 

 

 
New York — 5.3%  

City of New York Industrial Development Agency, RB, PILOT (AMBAC), 5.00%, 01/01/39

    925       936,637  

City of New York Water & Sewer System, Refunding RB, Water and Sewer System, 2nd General Resolution, Fiscal 2013, Series BB, 4.00%, 06/15/47

    1,660       1,700,072  

Erie Tobacco Asset Securitization Corp., Refunding RB, Asset-Backed, Series A, 5.00%, 06/01/45

    1,160       1,159,907  

New York Counties Tobacco Trust IV, Refunding RB, Settlement Pass-Through Turbo, Series A, 6.25%, 06/01/41(a)

    900       938,223  

New York Liberty Development Corp., Refunding RB:

   

2nd Priority, Bank of America Tower at One Bryant Park Project, Class 3, 6.38%, 07/15/49

    800       845,312  

3 World Trade Center Project, Class 2,
5.38%, 11/15/40(a)

    405       445,294  

New York Transportation Development Corp., ARB, LaGuardia Airport Terminal B Redevelopment Project, Series A, AMT, 5.00%, 07/01/41

    1,000       1,086,550  

New York Transportation Development Corp., Refunding ARB, American Airlines, Inc., AMT, 5.00%, 08/01/31

    1,295       1,365,642  

Niagara Area Development Corp., Refunding RB, Solid Waste Disposal Facility, Covanta Energy Project, Series A, AMT, 5.25%, 11/01/42(a)

    400       400,264  
   

 

 

 
      8,877,901  
North Carolina — 0.6%  

North Carolina Medical Care Commission, Refunding RB, The United Methodist Retirement Homes, Series A:

   

5.00%, 10/01/42

    300       329,931  
Security   Par
(000)
    Value  
North Carolina (continued)  

North Carolina Medical Care Commission, Refunding RB, The United Methodist Retirement Homes, Series A (continued):

   

5.00%, 10/01/47

  $ 695     $ 757,196  
   

 

 

 
      1,087,127  
North Dakota — 0.3%  

County of Burleigh North Dakota, Refunding RB, St. Alexius Medical Center Project, Series A, 5.00%, 07/01/21(b)

    480       521,683  
   

 

 

 
Ohio — 4.1%  

Buckeye Tobacco Settlement Financing Authority, RB, Asset-Backed, Senior Turbo Term, Series A-2, 6.50%, 06/01/47

    2,000       2,024,060  

City of Dayton Ohio Airport Revenue, Refunding ARB, James M. Cox Dayton International Airport, Series A (AGM), AMT, 4.00%, 12/01/32

    2,000       2,044,440  

Northwest Local School District/Hamilton & Butler Counties, GO, School Improvements, 4.00%, 12/01/50

    1,135       1,155,736  

State of Ohio, Refunding RB, University Hospitals Health System, Series A, 5.00%, 01/15/41

    1,500       1,583,535  
   

 

 

 
      6,807,771  
   

 

 

 
Oklahoma — 2.2%  

Norman Oklahoma Regional Hospital Authority, Refunding RB, 4.00%, 09/01/37

    1,275       1,306,454  

Oklahoma City Public Property Authority, Refunding RB, 5.00%, 10/01/39

    720       810,000  

Oklahoma Development Finance Authority, RB:

   

OU Medicine Project, Series B, 5.25%, 08/15/48

    605       679,645  

Provident Oklahoma Education Resources, Inc., Cross Village Student Housing Project, Series A, 5.25%, 08/01/57

    820       884,206  
   

 

 

 
      3,680,305  
Oregon — 1.4%  

Oregon Health & Science University, RB, Series A, 4.00%, 07/01/37

    675       707,994  
 

 

 

     5  


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
Oregon (continued)  

State of Oregon State Facilities Authority, Refunding RB, University of Portland Project, Series A, 5.00%, 04/01/45

  $ 1,475     $ 1,634,654  
   

 

 

 
      2,342,648  
Pennsylvania — 9.7%  

Commonwealth Financing Authority, RB, Tobacco Master Settlement Payment:

   

5.00%, 06/01/33

    335       379,478  

5.00%, 06/01/34

    750       849,577  

(AGM), 4.00%, 06/01/39

    1,365       1,393,215  

County of Allegheny Pennsylvania IDA, Refunding RB, U.S. Steel Corp. Project, 6.55%, 12/01/27

    1,695       1,758,986  

County of Montgomery Higher Education & Health Authority, Refunding RB, Thomas Jefferson University, Series A, 4.00%, 09/01/49

    495       500,376  

Delaware River Port Authority, RB:

   

4.50%, 01/01/32

    1,500       1,608,315  

Series D (AGM), 5.00%, 01/01/40

    2,600       2,717,000  

Pennsylvania Turnpike Commission, Refunding RB, Turnpike Subordinate Revenue, Second Series, 5.00%, 12/01/35

    5,000       5,601,250  

Pottsville Hospital Authority, Refunding RB, Lehigh Valley Health Network, Series B, 5.00%, 07/01/45

    1,250       1,381,975  
   

 

 

 
      16,190,172  
Puerto Rico — 1.1%  

Children’s Trust Fund, Refunding RB, Tobacco Settlement Asset-Backed Bonds:

   

5.50%, 05/15/39

    940       934,191  

5.63%, 05/15/43

    890       883,476  
   

 

 

 
      1,817,667  
Rhode Island — 3.6%  

Rhode Island Health & Educational Building Corp., Refunding RB, Series A (AGM), 3.75%, 05/15/32

    1,155       1,178,781  

State of Rhode Island, COP, School for the Deaf Project, Series C (AGC), 5.38%, 04/01/19(b)

    900       927,414  

Tobacco Settlement Financing Corp., Refunding RB:

   

Series A, 5.00%, 06/01/40

    1,000       1,069,270  
Security   Par
(000)
    Value  
Rhode Island (continued)  

Tobacco Settlement Financing Corp., Refunding RB (continued):

   

Series B, 4.50%, 06/01/45

  $ 2,730     $ 2,780,833  
   

 

 

 
      5,956,298  
South Carolina — 1.5%  

Spartanburg Regional Health Services District, Refunding RB, Series A, 4.00%, 04/15/43

    1,500       1,517,040  

State of South Carolina Public Service Authority, RB, Series E, 5.50%, 12/01/53

    1,000       1,083,030  
   

 

 

 
      2,600,070  
Tennessee — 2.9%  

Chattanooga Health Educational & Housing Facility Board, RB, Catholic Health Initiatives, Series A, 5.25%, 01/01/40

    1,950       2,092,194  

County of Chattanooga-Hamilton Tennessee Hospital Authority, Refunding RB, Series A, 5.00%, 10/01/44

    875       941,132  

County of Memphis-Shelby Tennessee Sports Authority, Inc., Refunding RB, Memphis Arena Project, Series A, 5.38%, 11/01/28

    275       288,371  

County of Nashville & Davidson Metropolitan Government Health & Educational Facilities Board, RB, Vanderbilt University Medical Center, Series A, 5.00%, 07/01/40

    675       753,719  

Johnson City Health & Educational Facilities Board, RB, Mountain States Health, Series A, 5.00%, 08/15/42

    800       843,544  
   

 

 

 
      4,918,960  
Texas — 9.7%  

County of Harris Texas Houston Sports Authority, Refunding RB, CAB, Senior Lien, Series G (NPFGC), 0.00%, 11/15/41(d)

    11,690       3,779,611  

County of Matagorda Texas Navigation District No. 1, Refunding RB, Central Power & Light Co., Project, Series A, 6.30%, 11/01/29

    1,500       1,598,265  

County of Midland Texas Fresh Water Supply District No. 1, RB, CAB, City of Midland Project, Series A, 0.00%, 09/15/38(d)

    10,760       4,532,112  
 

 

 

6   


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
Texas (continued)  

Leander ISD, GO, Refunding CAB, Series D (PSF-GTD)(d):

   

0.00%, 08/15/24(b)

  $ 370     $ 190,372  

0.00%, 08/15/35

    3,630       1,781,895  

Red River Texas Education Financing Corp., RB, Texas Christian University Project,
5.25%, 03/15/38

    760       850,318  

San Antonio Public Facilities Corp., Refunding RB, Convention Center Refinancing and Expansion Project, 4.00%, 09/15/42

    1,355       1,380,040  

Texas Private Activity Bond Surface Transportation Corp., RB, Senior Lien, LBJ Infrastructure Group LLC, 7.00%, 06/30/40

    2,000       2,184,420  
   

 

 

 
      16,297,033  
Utah — 0.5%        

Utah Charter School Finance Authority, RB, Utah Charter Academies Project, 5.00%, 10/15/48

    360       402,152  

Utah State Charter School Finance Authority, Refunding RB, Mountainville Academy,
4.00%, 04/15/42

    400       406,892  
   

 

 

 
      809,044  
Vermont — 0.7%        

University of Vermont & State Agricultural College, Refunding RB, 4.00%, 10/01/37

    500       518,080  

Vermont Student Assistance Corp., RB, Series A, 4.13%, 06/15/30

    655       672,056  
   

 

 

 
      1,190,136  
Virginia — 2.7%        

Ballston Quarter Community Development Authority, Tax Allocation Bonds, Series A, 5.38%, 03/01/36

    490       513,809  

Virginia HDA, RB, M/F Housing, Rental Housing, Series B, 4.00%, 06/01/53

    385       391,992  

Virginia Small Business Financing Authority, RB, AMT:

   

Covanta Project, 5.00%, 01/01/48(a)(g)

    470       478,610  

Senior Lien, Elizabeth River Crossings OpCo LLC Project, 6.00%, 01/01/37

    725       808,411  
Security   Par
(000)
    Value  
Virginia (continued)  

Virginia Small Business Financing Authority, RB, AMT (continued):

   

Transform 66 P3 Project, 5.00%, 12/31/49

  $ 2,135     $ 2,343,739  
   

 

 

 
      4,536,561  
Washington — 1.7%        

Washington Health Care Facilities Authority, RB, Seattle Childrens Hospital, Series A,
5.00%, 10/01/45

    2,000       2,222,960  

Washington State Housing Finance Commission, Refunding RB, Horizon House Project, 5.00%, 01/01/38(a)

    600       662,292  
   

 

 

 
      2,885,252  
Wisconsin — 0.6%        

Public Finance Authority, Refunding RB, National Gypsum Co., AMT, 4.00%, 08/01/35

    280       274,531  

WPPI Energy Power Supply Systems, Refunding RB, Series A, 5.00%, 07/01/37

    665       743,437  
   

 

 

 
      1,017,968  
   

 

 

 

Total Municipal Bonds — 137.5%
(Cost — $214,861,468)

 

    230,545,833  
   

 

 

 

Municipal Bonds Transferred to Tender Option
Bond Trusts(h)

 

California — 1.0%  

Los Angeles Unified School District California, GO, Election of 2008, Series B-1, 5.25%, 07/01/42(i)

    1,451       1,741,702  
   

 

 

 
Connecticut — 1.8%  

State of Connecticut Health & Educational Facility Authority, Refunding RB, Trinity Health Credit Group, 5.00%, 12/01/45

    2,611       2,941,694  
   

 

 

 
Georgia — 2.7%  

City of Atlanta Georgia Water & Wastewater Revenue, Refunding RB, 5.00%, 11/01/43

    4,003       4,520,390  
   

 

 

 
New Jersey — 0.9%  

New Jersey Transportation Trust Fund Authority, RB, Transportation System, Series B,
5.25%, 06/15/36(i)

    1,400       1,461,990  
   

 

 

 
New York — 12.6%  

City of New York, GO, Refunding Fiscal 2015, Series B, 4.00%, 08/01/32

    3,990       4,222,537  
 

 

 

     7  


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

(Percentages shown are based on Net Assets)

 

Security   Par
(000)
    Value  
New York (continued)  

City of New York Municipal Water Finance Authority, RB, Water & Sewer System, Fiscal 2009, Series A:

   

5.75%, 06/15/18(b)

  $ 104     $ 103,715  

5.75%, 06/15/40

    346       346,828  

City of New York New York Municipal Water Finance Authority, Refunding RB, Water & Sewer System, 2nd General Resolution, Series FF-2, 5.50%, 06/15/40

    405       419,810  

City of New York New York Water & Sewer System, Refunding RB, 2nd General Resolution, Fiscal 2013, Series CC, 5.00%, 06/15/47

    6,000       6,714,256  

Hudson Yards Infrastructure Corp., RB, Fiscal 2012, Series A, 5.75%, 02/15/47 (i)

    2,500       2,733,555  

New York Liberty Development Corp., ARB, 1 World Trade Center Port Authority Consolidated Bonds, 5.25%, 12/15/43

    2,505       2,742,963  

State of New York Dormitory Authority, RB, State University Dormitory Facilities, New York University, Series A, 5.00%, 07/01/18(b)

    2,199       2,203,344  

State of New York Thruway Authority, Refunding RB, Transportation, Personal Income Tax,
Series A, 5.00%, 03/15/31

    1,560       1,697,405  
   

 

 

 
      21,184,413  
Security   Par
(000)
    Value  
Texas — 2.9%            

City of Houston Texas Community College, GO, Limited Tax, 4.00%, 02/15/43

  $     2,999     $ 3,071,750  

City of San Antonio Texas Electric and Gas Systems, RB, Junior Lien, 5.00%, 02/01/43

    1,580       1,717,223  
   

 

 

 
          4,788,973  
Virginia — 1.7%  

Washington Metropolitan Area Transit Authority, RB, Series B, 5.00%, 07/01/42

    2,495       2,885,282  
   

 

 

 

Total Municipal Bonds Transferred to Tender Option Bond Trusts — 23.6%
(Cost — $38,350,860)

 

    39,524,444  
   

 

 

 

Total Long-Term Investments — 161.1%
(Cost — $253,212,328)

 

    270,070,277  

Other Assets Less Liabilities — 0.5%

 

    1,146,983  

Liability for TOB Trust Certificates, Including Interest Expense and Fees Payable — (14.0)%

 

    (23,633,496

VMTP Shares at Liquidation Value — (47.6)%

 

    (79,900,000
   

 

 

 

Net Assets Applicable to Common Shares — 100.0%

 

  $ 167,683,764  
   

 

 

 
 
(a)  Security exempt from registration pursuant to Rule 144A under the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration to qualified institutional investors.
(b)  U.S. Government securities, held in escrow, are used to pay interest on this security, as well as to retire the bond in full at the date indicated, typically at a premium to par.
(c)  Step-up bond that pays an initial coupon rate for the first period and then a higher coupon rate for the following periods. Rate as of period end.
(d)  Zero-coupon bond.
(e)  Non-income producing security.
(f)  Issuer filed for bankruptcy and/or is in default.
(g)  Variable or floating rate security, which interest rate adjusts periodically based on changes in current interest rates and prepayments on the underlying pool of assets. Rate shown is the rate in effect as of period end.
(h)  Represent bonds transferred to a TOB Trust in exchange of cash and residual certificates received by the Trust. These bonds serve as collateral in a secured borrowing.
(i)  All or a portion of security is subject to a recourse agreement. The aggregate maximum potential amount the Trust could ultimately be required to pay under the agreements, which expire between February 15, 2019 to January 1, 2026, is $3,415,794.
  During the period ended May 31, 2018, investments in issuers considered to be an affiliate of the Trust for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

 

 

8   


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

 

 

Affiliated   

Shares
Held at

08/31/17

     Net
Activity
     Shares
Held at
05/31/18
     Value at
05/31/18
     Income      Net Realized
Gain (Loss)(a)
     Change in
Unrealized
Appreciation
(Depreciation)
 

BlackRock Liquidity Funds, MuniCash, Institutional Class

     136,442        (136,442           $      $ 7,638      $ 107      $  
           

 

 

    

 

 

    

 

 

    

 

 

 

 

(a)  Includes net capital gain distributions, if applicable.

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts

Description    Number of
Contracts
       Expiration
Date
       Notional
Amount
(000)
  Value /
Unrealized
Appreciation
(Depreciation)
 

Short Contracts:

              

10-Year U.S. Treasury Note

     52          09/19/18        $ 6,263   $ (43,873

Long U.S. Treasury Bond

     73          09/19/18        10,594     (196,021

5-Year U.S. Treasury Note

     12          09/28/18        1,367     (4,820
              

 

 

 
               $ (244,714
              

 

 

 

Portfolio Abbreviations

AGC — Assured Guarantee Corp.

AGM — Assured Guaranty Municipal Corp.

AMBAC — American Municipal Bond Assurance Corp.

AMT — Alternative Minimum Tax (subject to)

ARB — Airport Revenue Bonds

CAB — Capital Appreciation Bonds

COP — Certificates of Participation

EDA — Economic Development Authority

GARB — General Airport Revenue Bonds

GO — General Obligation Bonds

HDA — Housing Development Authority

IDA — Industrial Development Authority

ISD — Independent School District

M/F — Multi-Family

NPFGC — National Public Finance Guarantee Corp.

PILOT — Payment in Lieu of Taxes

PSF- GTD — Permanent School Fund Guaranteed

RB — Revenue Bonds

S/F — Single-Family

 

 

     9  


Schedule of Investments  (unaudited) (continued)

May 31, 2018

  

BlackRock Municipal Bond Trust (BBK)

 

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of investments and derivative financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

 

    Level 1 — Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Trust has the ability to access

 

    Level 2 — Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs)

 

    Level 3 — Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Trust’s own assumptions used in determining the fair value of investments and derivative financial instruments)

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the BlackRock Global Valuation Methodologies Committee (the “Global Valuation Committee”) in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. Level 3 investments may also be adjusted to reflect illiquidity and/or non-transferability, with the amount of such discount estimated by the Global Valuation Committee in the absence of market information.

Changes in valuation techniques may result in transfers into or out of an assigned level within the hierarchy. In accordance with the Trust’s policy, transfers between different levels of the fair value hierarchy are deemed to have occurred as of the beginning of the reporting period. The categorization of a value determined for investments and derivative financial instruments is based on the pricing transparency of the investments and derivative financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Trust’s policy regarding valuation of investments and derivative financial instruments, refer to the Trust’s most recent financial statements as contained in its semi-annual report.

As of May 31, 2018, the following tables summarize the Trust’s investments and derivative financial instruments categorized in the disclosure hierarchy:

 

      Level 1        Level 2        Level 3        Total  

Assets:

                 

Investments:

                 

Long-Term Investments(a)

   $        $ 270,070,277        $        $ 270,070,277  
  

 

 

 

Derivative Financial Instruments(b)

 

Liabilities:

 

Interest rate contracts

   $ (244,714      $        $        $ (244,714
  

 

 

 

 

(a)  See above Schedule of Investments for values in each state or political subdivision.
(b)  Derivative financial instruments are futures contracts which are valued at the unrealized appreciation (depreciation) on the instrument.

The Trust may hold assets and/or liabilities in which the fair value approximates the carrying amount for financial reporting purposes. As of period end, such assets and/or liabilities are categorized within the disclosure hierarchy as follows:

 

      Level 1        Level 2        Level 3        Total  

Liabilities:

                 

TOB Trust Certificates

   $        $ (23,527,878      $        $ (23,527,878

VMTP Shares at Liquidation Value

              (79,900,000                 (79,900,000
  

 

 

 
   $        $ (103,427,878      $        $ (103,427,878
  

 

 

 

During the period ended May 31, 2018, there were no transfers between levels.

 

 

10   


Item 2 – Controls and Procedures

 

2(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”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended.
2(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) 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

      Certifications – Attached hereto


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.

 

BlackRock Municipal Bond Trust
By:       /s/ John M. Perlowski                        
  John M. Perlowski
 

Chief Executive Officer (principal executive officer) of

BlackRock Municipal Bond Trust

Date: July 19, 2018

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:       /s/ John M. Perlowski                        
  John M. Perlowski
 

Chief Executive Officer (principal executive officer) of

BlackRock Municipal Bond Trust

Date: July 19, 2018

 

By:       /s/ Neal J. Andrews                            
  Neal J. Andrews
 

Chief Financial Officer (principal financial officer) of

BlackRock Municipal Bond Trust

Date: July 19, 2018