BlackRock MuniYield Investment Fund

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 811-06502

Name of Fund:  BlackRock MuniYield Investment Fund (MYF)

Fund Address:   100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock MuniYield

            Investment Fund, 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: 07/31/2017

Date of reporting period: 10/31/2016


Item 1 – Schedule of Investments


Schedule of Investments October 31, 2016 (Unaudited)

  

BlackRock MuniYield Investment Fund (MYF)

(Percentages shown are based on Net Assets)

 

Municipal Bonds    Par  
(000)
    Value  

Alabama — 0.3%

    

City of Selma Alabama IDB, RB, Gulf Opportunity Zone, International Paper Co. Project, Series A, 5.38%, 12/01/35

   $ 545      $ 624,755   

Alaska — 0.8%

    

Alaska Municipal Bond Bank Authority, RB (a):

    

5.75%, 9/01/18

     975        1,061,209   

5.75%, 9/01/18

     25        27,206   

Northern Tobacco Securitization Corp., Refunding RB, Tobacco Settlement, Asset-Backed, Series A, 5.00%, 6/01/46

     690        651,367   
    

 

 

 
               1,739,782   

Arizona — 0.5%

    

City of Phoenix Arizona IDA, RB, Legacy Traditional Schools Projects, Series A, 5.00%, 7/01/46 (b)(c)

     1,070        1,094,771   

California — 13.1%

  

California Educational Facilities Authority, RB, University of Southern California, Series A, 5.25%, 10/01/18 (a)

     2,740        2,969,804   

California Health Facilities Financing Authority, RB, Sutter Health, Series B, 6.00%, 8/15/42

     1,645        1,919,271   

California Health Facilities Financing Authority, Refunding RB, Catholic Healthcare West, Series A, 6.00%, 7/01/39

     710        793,588   

California Statewide Communities Development Authority, RB, Loma Linda University Medical Center, Series A (b):

    

5.00%, 12/01/41

     330        367,155   

5.00%, 12/01/46

     405        446,456   

City & County of San Francisco California Airports Commission, Refunding ARB, AMT, Series A:

    

2nd, 5.50%, 5/01/28

     1,065        1,274,890   

2nd, 5.25%, 5/01/33

     830        959,148   

5.00%, 5/01/44

     1,275        1,442,382   

City of Los Angeles California Department of Water & Power, RB, Power System, Sub-Series A-1, 5.25%, 7/01/38

     2,000        2,135,640   

City of San Jose California, Refunding ARB, Series A-1, AMT, 5.50%, 3/01/30

     1,500        1,732,590   
Municipal Bonds    Par  
(000)
    Value  

California (continued)

  

Kern Community College District, GO, Safety, Repair & Improvement, Series C, 5.50%, 11/01/33

   $ 1,620      $ 1,999,371   

San Diego Regional Building Authority, RB, County Operations Center & Annex, Series A, 5.38%, 2/01/19 (a)

     1,310        1,439,795   

State of California, GO, Various Purposes, 6.00%, 3/01/33

     2,535        2,942,400   

State of California Public Works Board, LRB, Various Capital Projects, Series I, 5.50%, 11/01/31

     1,000        1,218,810   

State of California Public Works Board, RB, Department of Corrections & Rehabilitation, Series F, 5.25%, 9/01/33

     835        1,004,538   

Township of Washington California Health Care District, GO, Election of 2004, Series B, 5.50%, 8/01/40

     625        747,094   

University of California, Refunding RB, The Regents of Medical Center, Series J, 5.25%, 5/15/38

     3,730        4,468,764   
    

 

 

 
               27,861,696   

Colorado — 1.0%

  

City & County of Denver Colorado Airport System, ARB, Series A, AMT:

    

5.50%, 11/15/28

     1,000        1,182,090   

5.50%, 11/15/30

     330        387,281   

5.50%, 11/15/31

     400        467,724   
    

 

 

 
               2,037,095   

Delaware — 0.3%

  

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

     500        551,915   

Florida — 6.6%

  

City of Jacksonville Florida, Refunding RB, Series A, 5.25%, 10/01/33

     675        806,409   

County of Broward Florida Airport System Revenue, ARB, Series A, AMT, 5.00%, 10/01/45

     985        1,116,665   
 

 

                
   BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016    1


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

Municipal Bonds   

Par  

(000)

    Value  

Florida (continued)

  

County of Hillsborough Florida Aviation Authority, Refunding ARB, Tampa International Airport, Series A, AMT, 5.50%, 10/01/29

   $ 1,995      $ 2,344,205   

County of Lee Florida, Refunding ARB, Series A, AMT, 5.38%, 10/01/32

     2,000        2,285,600   

County of Lee Florida HFA, RB, S/F Housing, Multi-County Program, Series A-2, AMT (Ginnie Mae), 6.00%, 9/01/40

     240        243,518   

County of Manatee Florida HFA, RB, S/F Housing, Series A, AMT (Ginnie Mae, Fannie Mae & Freddie Mac), 5.90%, 9/01/40

     220        223,258   

County of Miami-Dade Florida, RB, Seaport:

    

Series A, 5.38%, 10/01/33

     1,170        1,341,195   

Series B, AMT, 6.25%, 10/01/38

     525        647,824   

Series B, AMT, 6.00%, 10/01/42

     700        835,576   

County of Miami-Dade Florida Aviation Revenue, Refunding ARB, Series A, AMT, 5.00%, 10/01/31

     2,440        2,812,661   

Reedy Creek Improvement District, GO, Series A, 5.25%, 6/01/32

     1,200        1,417,512   
    

 

 

 
               14,074,423   

Georgia — 0.1%

  

Municipal Electric Authority of Georgia, Refunding RB, Project One, Series D, 6.00%, 1/01/23

     230        248,559   

Hawaii — 1.2%

  

State of Hawaii, Department of Transportation, COP, AMT:

    

5.25%, 8/01/25

     485        575,884   

5.25%, 8/01/26

     525        621,364   

State of Hawaii, Department of Transportation, RB, Series A, AMT, 5.00%, 7/01/45

     1,135        1,291,278   
    

 

 

 
               2,488,526   

Illinois — 15.1%

  

City of Chicago Illinois Midway International Airport, Refunding GARB, 2nd Lien, Series A, 5.00%, 1/01/41

     1,000        1,110,360   
Municipal Bonds   

Par  

(000)

    Value  

Illinois (continued)

  

City of Chicago Illinois O’Hare International Airport, GARB, 3rd Lien, Series C, 6.50%, 1/01/21 (a)

   $ 6,065      $ 7,255,378   

City of Chicago Illinois Transit Authority, RB, Sales Tax Receipts:

    

5.25%, 12/01/36

     1,000        1,106,820   

5.25%, 12/01/40

     1,000        1,103,840   

County of Cook Illinois Community College District No. 508, GO, City College of Chicago:

    

5.50%, 12/01/38

     2,000        2,265,040   

5.25%, 12/01/43

     1,500        1,670,340   

Illinois Finance Authority, RB, Carle Foundation, Series A, 6.00%, 8/15/41

     4,000        4,677,240   

Illinois Finance Authority, Refunding RB:

    

Central DuPage Health, Series B, 5.38%, 11/01/39

     1,200        1,344,168   

Northwestern Memorial Hospital, Series A, 6.00%, 8/15/39

     4,160        4,701,050   

Presence Health Network, Series C, 4.00%, 2/15/41

     910        869,050   

Railsplitter Tobacco Settlement Authority, RB:

    

5.50%, 6/01/23

     1,370        1,588,268   

6.00%, 6/01/28

     390        457,957   

State of Illinois, GO:

    

5.25%, 2/01/32

     2,200        2,380,092   

5.50%, 7/01/33

     1,000        1,098,000   

5.50%, 7/01/38

     415        453,628   
    

 

 

 
               32,081,231   

Indiana — 3.1%

  

City of Valparaiso Indiana, RB, Exempt Facilities, Pratt Paper LLC Project, AMT, 6.75%, 1/01/34

     1,350        1,657,597   

Indiana Municipal Power Agency, RB, Series B, 6.00%, 1/01/19 (a)

     4,525        5,009,718   
    

 

 

 
               6,667,315   

Kansas — 1.7%

  

Kansas Development Finance Authority, Refunding RB, Adventist Health System/Sunbelt Obligated Group, Series C, 5.50%, 11/15/29

     3,275        3,680,019   
 

 

                
2    BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016   


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

Municipal Bonds   

Par  

(000)

    Value  

Kentucky — 0.6%

  

County of Louisville & Jefferson Kentucky Metropolitan Government Parking Authority, RB, Series A, 5.75%, 12/01/19 (a)

   $ 1,200      $ 1,371,972   

Louisiana — 2.2%

  

Lake Charles Harbor & Terminal District, RB, Series B, AMT (AGM), 5.50%, 1/01/29

     1,500        1,782,705   

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

     1,420        1,643,139   

Tobacco Settlement Financing Corp., Refunding RB, Asset-Backed, Series A, 5.50%, 5/15/29

     1,195        1,301,128   
    

 

 

 
               4,726,972   

Maine — 1.4%

  

Maine Health & Higher Educational Facilities Authority, RB, Maine General Medical Center, 7.50%, 7/01/32

     2,500        2,929,275   

Massachusetts — 2.3%

  

Massachusetts HFA, Refunding RB, AMT:

    

Series B, 5.50%, 6/01/41

     975        1,025,671   

Series C, 5.35%, 12/01/42

     1,650        1,762,645   

Series F, 5.70%, 6/01/40

     1,910        1,990,144   
    

 

 

 
               4,778,460   

Michigan — 3.1%

  

City of Lansing Michigan, RB, Board of Water & Light Utilities System, Series A, 5.50%, 7/01/41

     1,805        2,112,319   

Michigan Finance Authority, Refunding RB, Henry Ford Health System, 4.00%, 11/15/46

     900        906,660   

Michigan State Building Authority, Refunding RB, Facilities Program Series:

    

6.00%, 10/15/18 (a)

     450        494,370   

6.00%, 10/15/18 (a)

     760        834,936   

6.00%, 10/15/38

     40        43,676   
Municipal Bonds   

Par  

(000)

    Value  

Michigan (continued)

  

Royal Oak Hospital Finance Authority Michigan, Refunding RB, William Beaumont Hospital, Series V, 8.25%, 9/01/18 (a)

   $ 1,970      $ 2,233,941   
    

 

 

 
               6,625,902   

Mississippi — 1.1%

  

Mississippi Development Bank, RB, Jackson Water & Sewer System Project (AGM), 6.88%, 12/01/40

     1,785        2,377,513   

Nevada — 3.3%

  

City of Las Vegas Nevada, GO, Limited Tax, Performing Arts Center, 6.00%, 4/01/19 (a)

     2,850        3,190,490   

County of Clark Nevada Airport System, ARB, Series B, 5.75%, 7/01/42

     3,375        3,831,502   
    

 

 

 
               7,021,992   

New Jersey — 4.3%

  

New Jersey EDA, RB, Private Activity Bond, Goethals Bridge Replacement Project, AMT (AGM), 5.00%, 1/01/31

     900        1,024,596   

New Jersey EDA, Refunding RB, New Jersey American Water Co., Inc. Project, AMT, Series A, 5.70%, 10/01/39

     2,250        2,503,057   

New Jersey Transportation Trust Fund Authority, RB, Transportation System:

    

Series A, 5.88%, 12/15/38

     2,670        2,894,894   

Series AA, 5.50%, 6/15/39

     2,475        2,777,668   
    

 

 

 
               9,200,215   

New York — 2.5%

  

Brooklyn Arena Local Development Corp., Refunding RB, Barclays Center Project, Series A (AGM), 3.00%, 7/15/43

     1,695        1,597,656   

Counties of New York Tobacco Trust IV, Refunding RB, Settlement Pass-Through Turbo, Series A, 6.25%, 6/01/41 (b)

     1,100        1,154,395   

MTA Hudson Rail Yards Trust Obligations, Refunding RB, Series A, 5.00%, 11/15/56

     665        751,403   
 

 

                
   BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016    3


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

Municipal Bonds   

Par  

(000)

    Value  

New York (continued)

  

New York Liberty Development Corp., Refunding RB, 2nd Priority, Bank of America Tower at One Bryant Park Project, Class 3, 6.38%, 7/15/49

   $ 1,650      $ 1,843,001   
    

 

 

 
               5,346,455   

Ohio — 2.2%

  

County of Allen Ohio Hospital Facilities, Refunding RB, Catholic Healthcare Partners, Series A, 5.25%, 6/01/38

     3,115        3,447,402   

State of Ohio Turnpike Commission, RB, Junior Lien, Infrastructure Projects, Series A-1, 5.25%, 2/15/31

     1,000        1,186,580   
    

 

 

 
               4,633,982   

Oklahoma — 0.4%

  

Tulsa Airports Improvement Trust, Refunding RB, American Airlines, Inc., AMT, 5.00%, 6/01/35 (d)

     700        809,018   

Pennsylvania — 3.8%

  

Pennsylvania Economic Development Financing Authority, RB, American Water Co. Project, 6.20%, 4/01/39

     1,075        1,192,562   

Pennsylvania Economic Development Financing Authority, Refunding RB, National Gypsum Co., AMT, 5.50%, 11/01/44

     1,000        1,098,960   

Pennsylvania Turnpike Commission, RB:

    

Series B, 5.00%, 12/01/45

     1,000        1,141,730   

Sub-Series A, 5.63%, 12/01/31

     2,455        2,816,180   

Township of Bristol Pennsylvania School District, GO, 5.25%, 6/01/37

     1,500        1,715,640   
    

 

 

 
               7,965,072   

Rhode Island — 2.2%

  

Tobacco Settlement Financing Corp., Refunding RB:

    

Series A, 5.00%, 6/01/40

     525        565,577   

Series B, 4.50%, 6/01/45

     3,950        4,092,161   
    

 

 

 
               4,657,738   

South Carolina — 4.6%

  

County of Charleston South Carolina, RB, Special Source, 5.25%, 12/01/38

     2,505        2,992,673   
Municipal Bonds   

Par  

(000)

    Value  

South Carolina (continued)

  

County of Charleston South Carolina Airport District, ARB, Series A, AMT:

    

6.00%, 7/01/38

   $ 1,955      $ 2,299,158   

5.50%, 7/01/41

     1,000        1,145,450   

South Carolina Ports Authority, RB, AMT, 5.25%, 7/01/50

     1,280        1,451,277   

State of South Carolina Public Service Authority, Refunding RB, Series E, 5.25%, 12/01/55

     1,500        1,767,870   
    

 

 

 
               9,656,428   

Tennessee — 1.3%

  

Metropolitan Nashville Airport Authority, ARB, AMT, Series B:

    

5.00%, 7/01/43

     1,000        1,139,320   

5.00%, 7/01/40

     1,350        1,542,483   
    

 

 

 
               2,681,803   

Texas — 9.3%

  

Central Texas Regional Mobility Authority, Refunding RB, Senior Lien (a):

    

5.75%, 1/01/21

     1,000        1,182,130   

6.00%, 1/01/21

     2,600        3,099,850   

Conroe Texas ISD, GO, School Building, Series A, 5.75%, 2/15/18 (a)

     1,800        1,913,454   

County of Tarrant Texas Cultural Education Facilities Finance Corp., RB, Scott & White Healthcare, 6.00%, 8/15/20 (a)

     3,515        4,149,879   

Dallas Area Rapid Transit, Refunding RB, Series A, 5.00%, 12/01/48

     1,900        2,216,578   

Dallas-Fort Worth International Airport, ARB, Joint Improvement, AMT:

    

Series A, 5.00%, 11/01/38

     1,365        1,501,500   

Series H, 5.00%, 11/01/37

     1,535        1,721,994   

North Texas Tollway Authority, Refunding RB, 1st Tier, Series K-1 (AGC), 5.75%, 1/01/19 (a)

     1,000        1,102,230   

Red River Education Financing Corp., RB, Texas Christian University Project, 5.25%, 3/15/38

     710        835,308   
 

 

                
4    BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016   


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

Municipal Bonds   

Par  

(000)

    Value  

Texas (continued)

  

Texas Private Activity Bond Surface Transportation Corp., RB, Senior Lien, NTE Mobility Partners LLC, North Tarrant Express Managed Lanes Project, 6.88%, 12/31/39

   $ 1,700      $ 1,975,196   
    

 

 

 
               19,698,119   

Virginia — 1.9%

  

City of Lexington Virginia IDA, RB, Washington & Lee University, 5.00%, 1/01/43

     560        638,809   

Virginia Public School Authority, RB, Fluvanna County School Financing, 6.50%, 12/01/18 (a)

     800        892,840   

Virginia Small Business Financing Authority, RB, Senior Lien, Elizabeth River Crossings OpCo LLC Project, AMT, 6.00%, 1/01/37

     2,090        2,433,115   
    

 

 

 
               3,964,764   

Wisconsin — 2.3%

  

Wisconsin Health & Educational Facilities Authority, Refunding RB:

    

Froedtert & Community Health, Inc., Series C, 5.25%, 4/01/39

     3,470        3,716,856   

Medical College of Wisconsin, Inc., 4.00%, 12/01/46

     1,155        1,215,337   
    

 

 

 
               4,932,193   
Total Municipal Bonds — 92.6%        196,527,960   
 
   

Municipal Bonds Transferred to

Tender Option Bond Trusts (e)

 

Alabama — 0.5%

  

Auburn University, Refunding RB, Series A, 4.00%, 6/01/41

     1,080        1,163,754   

California — 20.2%

  

Bay Area Toll Authority, Refunding RB, San Francisco Bay Area, Series F-1, 5.63%, 4/01/19 (a)

     2,681        2,981,575   

California Educational Facilities Authority, RB, University of Southern California, Series B, 5.25%, 10/01/18 (a)(f)

     4,200        4,552,254   

Grossmont Union High School District, GO, Election of 2008, Series B, 5.00%, 8/01/20 (a)

     6,000        6,867,960   

Municipal Bonds Transferred to

Tender Option Bond Trusts (e)

  

Par  

(000)

    Value  

California (continued)

  

Los Angeles Community College District California, GO, Election of 2008, Series C, 5.25%, 8/01/20 (a)(f)

   $ 5,251      $ 6,058,481   

Los Angeles Community College District California, GO, Refunding, Election of 2008, Series A, 6.00%, 8/01/19 (a)

     7,697        8,742,588   

Los Angeles Unified School District California, GO, Series I, 5.00%, 1/01/34

     790        871,844   

San Diego Public Facilities Financing Authority Water, RB, Series B, 5.50%, 8/01/19 (a)

     8,412        9,441,546   

University of California, RB, Series O, 5.75%, 5/15/19 (a)

     3,001        3,360,147   
    

 

 

 
               42,876,395   

Colorado — 1.1%

  

Colorado Health Facilities Authority, Refunding RB, Catholic Health Initiatives, Series A, 5.50%, 7/01/34 (f)

     2,149        2,368,505   

District of Columbia — 3.3%

  

District of Columbia, RB, Series A, 5.50%, 12/01/30 (f)

     2,804        3,178,978   

District of Columbia Water & Sewer Authority, Refunding RB, Senior Lien, Series A, 5.50%, 10/01/18 (a)

     3,507        3,814,771   
    

 

 

 
               6,993,749   

Florida — 2.0%

  

County of Hillsborough Florida Aviation Authority, ARB, Tampa International Airport, Series A, AMT (AGC), 5.50%, 10/01/38

     3,869        4,148,296   

Illinois — 3.6%

  

State of Illinois Finance Authority, RB, University of Chicago, Series B, 6.25%, 7/01/18 (a)

     5,300        5,769,792   

State of Illinois Toll Highway Authority, RB, Senior Priority, Series B, 5.50%, 1/01/18 (a)

     1,750        1,844,771   
    

 

 

 
               7,614,563   

Nevada — 8.8%

  

County of Clark Nevada Water Reclamation District, GO (a):

    

Limited Tax, 6.00%, 7/01/18

     5,000        5,422,550   

Series B, 5.50%, 7/01/19

     5,668        6,334,492   
 

 

                
   BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016    5


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

Municipal Bonds Transferred to

Tender Option Bond Trusts (e)

  

Par  

(000)

    Value  

Nevada (continued)

  

Las Vegas Valley Water District, GO, Refunding, Series C, 5.00%, 6/01/28

   $ 6,070      $ 6,997,192   
    

 

 

 
               18,754,234   

New Hampshire — 1.1%

  

New Hampshire Health & Education Facilities Authority, RB, Dartmouth College, 5.25%, 6/01/19 (a)(f)

     2,159        2,393,189   

New Jersey — 3.6%

  

New Jersey Housing & Mortgage Finance Agency, RB, S/F Housing, Series CC, 5.25%, 10/01/29

     2,249        2,367,306   

New Jersey Transportation Trust Fund Authority, RB, Transportation System:

    

Series A (AMBAC), 5.00%, 12/15/32

     4,000        4,145,280   

Series B, 5.25%, 6/15/36 (f)

     1,000        1,096,201   
    

 

 

 
               7,608,787   

New York — 16.3%

  

City of New York New York Municipal Water Finance Authority, Refunding RB, Water & Sewer System, 2nd General Resolution:

    

Series BB, 5.25%, 6/15/44

     4,408        5,206,329   

Series FF, 5.00%, 6/15/45

     3,859        4,442,578   

Series FF-2, 5.50%, 6/15/40

     2,505        2,785,209   

City of New York New York Transitional Finance Authority, RB, Fiscal 2009, Series S-3, 17.38%, 1/15/39 (b)(d)

     2,499        2,712,656   

Hudson Yards Infrastructure Corp., RB, Fiscal 2012, Series A, 5.75%, 2/15/47 (f)

     1,290        1,507,090   

Metropolitan Transportation Authority, Refunding RB, Series C-1, 5.25%, 11/15/56

     3,000        3,606,646   

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

     4,365        5,093,847   

New York Liberty Development Corp., Refunding RB, 4 World Trade Center Project, 5.75%, 11/15/51 (f)

     2,560        3,003,365   

Municipal Bonds Transferred to

Tender Option Bond Trusts (e)

  

Par  

(000)

    Value  

New York (continued)

  

New York State Dormitory Authority, ERB, Personal Income Tax, Series B, 5.25%, 3/15/38

   $ 5,700      $ 6,244,407   
    

 

 

 
               34,602,127   

South Carolina — 1.7%

  

South Carolina Public Service Authority, Refunding RB, Series A (a):

    

5.50%, 1/01/19 (f)

     258        283,244   

5.50%, 1/01/19

     2,986        3,275,103   
    

 

 

 
               3,558,347   

Texas — 6.8%

  

City of San Antonio Texas Public Service Board, Refunding RB, Series A, 5.25%, 2/01/19 (a)(f)

     3,989        4,365,723   

County of Harris Texas Cultural Education Facilities Finance Corp., RB, Texas Children’s Hospital Project, 5.50%, 10/01/39

     5,400        6,017,382   

North Texas Tollway Authority, RB, Special Projects System, Series A, 5.50%, 9/01/41

     3,480        4,098,709   
    

 

 

 
               14,481,814   

Utah — 1.0%

  

City of Riverton Utah, RB, IHC Health Services, Inc., 5.00%, 8/15/41

     1,994        2,155,356   

Virginia — 0.9%

  

County of Fairfax Virginia IDA, Refunding RB, Health Care, Inova Health System:

    

5.50%, 5/15/19 (a)

     612        677,979   

5.50%, 5/15/35

     1,137        1,259,597   
    

 

 

 
               1,937,576   

Total Municipal Bonds Transferred to

Tender Option Bond Trusts — 70.9%

  

  

    150,656,692   
Total Long-Term Investments
(Cost — $313,215,403) — 163.5%
        347,184,652   
 

 

                
6    BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016   


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

 

Short-Term Securities    Shares     Value  

BlackRock Liquidity Funds, MuniCash, Institutional Class, 0.44% (g)(h)

     264,262      $ 264,288   

Total Short-Term Securities

(Cost — $264,288) — 0.1%

  

  

    264,288   
    Value  
Total Investments
(Cost — $313,479,691*) — 163.6%
  $ 347,448,940   
Other Assets Less Liabilities — 1.3%     2,841,933   

Liability for TOB Trust Certificates, Including Interest
Expense and Fees Payable — (37.1)%

    (78,710,283

VRDP Shares at Liquidation Value, Net of Deferred
Offering Costs — (27.8)%

    (59,221,357
 

 

 

 

Net Assets Applicable to Common Shares — 100.0%

  $ 212,359,233   
 

 

 

 

 

*   As of October 31, 2016, gross unrealized appreciation and depreciation based on cost for federal income tax purposes were as follows:

 

 

Tax cost

  $ 235,321,926   
 

 

 

 

Gross unrealized appreciation

  $ 34,228,543   

Gross unrealized depreciation

    (672,598
 

 

 

 

Net unrealized appreciation

  $ 33,555,945   
 

 

 

 
 
Notes to Schedule of Investments

 

(a)   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.

 

(b)   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.

 

(c)   When-issued security.

 

(d)   Variable rate security. Rate as of period end.

 

(e)   Represent bonds transferred to a TOB Trust in exchange of cash and residual certificates received by the Fund. These bonds serve as collateral in a secured borrowing.

 

(f)   All or a portion of security is subject to a recourse agreement. The aggregate maximum potential amount the Fund could ultimately be required to pay under the agreement(s), which expire between October 1, 2016 to November 15, 2019, is $18,113,292.

 

(g)   During the period ended October 31, 2016, investments in issuers considered to be affiliates of the Fund for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

 

Affiliate  

Shares Held
at July 31,

2016

    Net
Activity
    Shares Held
at October 31,
2016
    Value at
October 31,
2016
    Income  

BlackRock Liquidity Funds, MuniCash, Institutional Class

    1        264,261        264,262      $ 264,288      $ 514   

 

(h)   Current yield as of period end.

For Fund compliance purposes, the Fund’s sector classifications refer to any one or more of the sector sub-classifications used by one or more widely recognized market indexes or rating group indexes, and/or as defined by the investment advisor. These definitions may not apply for purposes of this report, which may combine such sector sub-classifications for reporting ease.

 

                
   BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016    7


Schedule of Investments (continued)

  

BlackRock MuniYield Investment Fund (MYF)

 

 

Derivative Financial Instruments Outstanding as of Period End

Futures Contracts

 

 

Contracts
Short
    Issue   Expiration   Notional
Value
    Unrealized
Appreciation
 
  (11   5-Year U.S. Treasury Note   December 2016   $ 1,328,766      $ 9,957   
  (29   10-Year U.S. Treasury Note   December 2016   $ 3,759,125        51,630   
  (17   Long U.S. Treasury Bond   December 2016   $ 2,766,219        116,792   
  (3   Ultra U.S. Treasury Bond   December 2016   $ 527,812        28,738   

 

Total

  

  $ 207,117   
       

 

 

 

 

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
COP    Certificates of Participation
EDA    Economic Development Authority
ERB    Education Revenue Bonds
GARB    General Airport Revenue Bonds
GO    General Obligation Bonds
HFA    Housing Finance Agency
IDA    Industrial Development Authority
IDB    Industrial Development Board
ISD    Independent School District
LRB    Lease Revenue Bonds
RB    Revenue Bonds

 

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 methodologies 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 Fund 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 Fund’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 Global Valuation Committee in determining the price for Fair Valued Investments. Level 3 Investments include equity or debt issued by privately-held companies. 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.

 

                
8    BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016   


Schedule of Investments (concluded)

  

BlackRock MuniYield Investment Fund (MYF)

 

Changes in valuation methodologies may result in transfers into or out of an assigned level within the hierarchy. In accordance with the Fund’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 is based on the pricing transparency of the investments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Fund’s policy regarding valuation of investments instruments, refer to the Fund’s most recent financial statements as contained in its annual report.

The following tables summarize the Fund’s investments and derivative financial instruments categorized in the disclosure hierarchy:

 

     Level 1        Level 2        Level 3        Total  

Assets:

                
Investments:                 

Long-Term Investments1

            $ 347,184,652                   $ 347,184,652   

Short-Term Securities

  $ 264,288                               264,288   
 

 

 

 

Total

  $ 264,288         $ 347,184,652                   $ 347,448,940   
 

 

 

 
    
Derivative Financial Instruments2                                         

Assets:

                

Interest rate contracts

  $ 207,117                             $ 207,117   

1    See above Schedule of Investments for values in each sector.

       

2    Derivative financial instruments are futures contracts. Futures contracts are valued at the unrealized appreciation (depreciation) on the instrument.

       

The Fund 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  

Assets:

                

Cash pledged for futures contracts

  $ 125,550                             $ 125,550   

Liabilities:

                

TOB Trust Certificates

            $ (78,571,069                  (78,571,069

VRDP Shares at Liquidation Value

              (59,400,000                  (59,400,000
 

 

 

 

Total

  $ 125,550         $ (137,971,069                $ (137,845,519
 

 

 

 

During the period ended October 31, 2016, there were no transfers between levels.

 

                
   BLACKROCK MUNIYIELD INVESTMENT FUND    OCTOBER 31, 2016    9


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 MuniYield Investment Fund
By:       /s/ John M. Perlowski                    
  John M. Perlowski
  Chief Executive Officer (principal executive officer) of
  BlackRock MuniYield Investment Fund

Date: December 20, 2016

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

 

By:       /s/ John M. Perlowski                    
  John M. Perlowski
  Chief Executive Officer (principal executive officer) of
  BlackRock MuniYield Investment Fund
Date: December 20, 2016
By:       /s/ Neal J. Andrews                      
  Neal J. Andrews
  Chief Financial Officer (principal financial officer) of
  BlackRock MuniYield Investment Fund

Date: December 20, 2016