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 811-10333

 

Name of Fund: BlackRock Municipal Income Investment Trust (BBF)

 

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

 

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock Municipal Income Investment 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: 07/31/2014

 

Date of reporting period: 10/31/2013

 

Item 1 – Schedule of Investments

 
 

Schedule of Investments October 31, 2013 (Unaudited) BlackRock Municipal Income Investment Trust (BBF)
  (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 $ 275           $ 268,801  
 
Alaska  — 0.2%  
Northern Tobacco Securitization Corp., Refunding RB, Asset-Backed, Series A, 5.00%, 6/01/46   330   227,017  
 
California  — 13.2%  
California Educational Facilities Authority, RB, University of Southern California, Series A, 5.25%, 10/01/38   1,315   1,408,391  
California Health Facilities Financing Authority, Refunding RB, Catholic Healthcare West, Series A, 6.00%, 7/01/39   890   969,984  
California State Public Works Board, LRB, Department of Corrections and Rehabilitation, Series F, 5.25%, 9/01/33   400   423,600  
Grossmont Union High School District, GO, Election of 2008, Series B, 4.75%, 8/01/45   850   852,865  
Kern Community College District, GO, Safety, Repair & Improvement, Series C, 5.50%, 11/01/33   775   870,046  
Los Angeles Department of Water & Power, RB, Sub-Series A-1, 5.25%, 7/01/38   1,750   1,857,783  
Sacramento California Municipal Utility District, RB, Series A, 5.00%, 8/15/37   745   777,780  
San Diego Regional Building Authority, RB, County Operations Center & Annex, Series A, 5.38%, 2/01/36   1,600   1,754,944  
State of California, GO, Various Purposes, 6.00%, 3/01/33   1,275   1,490,870  
University of California Medical Center, Refunding RB, Series J, 5.25%, 5/15/38   1,780   1,867,095  
       
    12,273,358  
 
Colorado  — 2.4%  
City & County of Denver Colorado Airport System, ARB, Subordinate System, Series B, 5.25%, 11/15/32   1,000   1,049,310  
           
Municipal Bonds Par
(000)
  Value  
 
Colorado (concluded)  
Colorado Health Facilities Authority, Refunding RB, Catholic Health Initiative, Series A, 5.50%, 7/01/34 $ 1,095 $ 1,199,244  
       
    2,248,554  
 
Florida  — 8.4%  
City of Jacksonville Florida, Refunding RB, Series A, 5.25%, 10/01/33   265   283,155  
County of Miami-Dade Florida, RB, Seaport, Series A, 6.00%, 10/01/38   3,800   4,159,442  
County of Miami-Dade Florida Transit System Sales Surtax, Refunding RB, 5.00%, 7/01/42   490   497,546  
County of Miami-Dade Florida Water & Sewer System, Refunding RB, Series B, 5.25%, 10/01/29   1,400   1,524,110  
Reedy Creek Improvement District, GO, Series A, 5.25%, 6/01/32   570   611,679  
Watergrass Community Development District, Special Assessment Bonds, Series B, 5.13%, 11/01/14   860   746,093  
       
    7,822,025  
 
Georgia  — 2.0%  
Municipal Electric Authority of Georgia, Refunding RB, Project One, Sub-Series D, 6.00%, 1/01/23   1,565   1,840,847  
 
Illinois  — 16.1%  
Chicago Illinois Transit Authority, RB:          
  5.25%, 12/01/31   1,060   1,105,304  
  Sales Tax Receipts, 5.25%, 12/01/36   310   317,989  
City of Chicago Illinois, GARB, O’Hare International Airport, Third Lien, Series C, 6.50%, 1/01/41   2,955   3,323,016  
City of Chicago Illinois, Refunding RB, Sales Tax, Series A, 5.25%, 1/01/38   385   401,852  
County of Cook Illinois Community College District No. 508, GO:          
  5.25%, 12/01/43   2,200   2,217,028  
  City College of Chicago, 5.50%, 12/01/38   380   398,878  
             

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20131
 

Schedule of Investments (continued) BlackRock Municipal Income Investment Trust (BBF)
  (Percentages shown are based on Net Assets)

 

Municipal Bonds Par
(000)
  Value  
 
Illinois (concluded)  
Illinois Finance Authority, RB:          
  Carle Foundation, Series A, 6.00%, 8/15/41 $ 1,000          $ 1,081,180  
  Rush University Medical Center Obligation Group, Series B, 7.25%, 11/01/30   1,600   1,884,128  
Illinois Finance Authority, Refunding RB, Northwestern Memorial Hospital, Series A, 6.00%, 8/15/39   1,900   2,128,760  
Railsplitter Tobacco Settlement Authority, RB:          
  5.50%, 6/01/23   690   758,731  
  6.00%, 6/01/28   195   209,079  
State of Illinois, GO, Various Purposes:          
  5.50%, 7/01/33   1,000   1,020,970  
  5.50%, 7/01/38   210   210,764  
       
    15,057,679  
 
Indiana  — 2.6%  
Indiana Municipal Power Agency, RB, Series B, 6.00%, 1/01/39   2,210   2,454,603  
 
Kansas  — 1.9%  
Kansas Development Finance Authority, Refunding RB, Adventist Health System/Sunbelt Obligated Group, Series C, 5.50%, 11/15/29   1,600   1,747,328  
 
Kentucky  — 0.6%  
Louisville & Jefferson County Metropolitan Government Parking Authority, RB, Series A, 5.75%, 12/01/34   500   570,080  
 
Louisiana  — 2.1%  
Louisiana Local Government Environmental Facilities & Community Development Authority, RB, Westlake Chemical Corp. Projects, Series A-1, 6.50%, 11/01/35   715   769,826  
Tobacco Settlement Financing Corp., Refunding RB, Asset-Backed, Series A:          
  5.50%, 5/15/28   560   583,330  
             
Municipal Bonds Par
(000)
  Value  
 
Louisiana (concluded)  
Tobacco Settlement Financing Corp., Refunding RB, Asset-Backed, Series A  (concluded):          
  5.50%, 5/15/29 $ 600 $ 619,464  
       
    1,972,620  
 
Maine  — 1.5%  
Maine Health & Higher Educational Facilities Authority, RB, Maine General Medical Center, 7.50%, 7/01/32   1,270   1,424,483  
 
Massachusetts  — 2.8%  
Massachusetts Health & Educational Facilities Authority, RB, Tufts University, Series O, 5.38%, 8/15/38   1,000   1,098,140  
Massachusetts School Building Authority, RB, Senior Series B, 5.00%, 10/15/41   1,490   1,556,558  
       
    2,654,698  
 
Michigan  — 3.5%  
City of Lansing Michigan, RB, Board of Water & Light, Series A, 5.50%, 7/01/41   915   981,072  
Michigan State Building Authority, Refunding RB, Facilities Program, Series I, 6.00%, 10/15/38   1,000   1,114,770  
Royal Oak Hospital Finance Authority, Refunding RB, William Beaumont Hospital, 8.25%, 9/01/39   995   1,196,866  
       
    3,292,708  
 
Mississippi  — 2.1%  
Mississippi Development Bank, RB, Jackson Water & Sewer System Project (AGM), 6.88%, 12/01/40   750   896,947  
Mississippi State University Educational Building Corp., Refunding RB, 5.25%, 8/01/38   1,000   1,074,120  
       
    1,971,067  
 
Nevada  — 4.0%  
City of Las Vegas Nevada, GO, Limited Tax, Performing Arts Center, 6.00%, 4/01/34   1,600   1,749,504  
           

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20132
 

Schedule of Investments (continued) BlackRock Municipal Income Investment Trust (BBF)
  (Percentages shown are based on Net Assets)

 

Municipal Bonds Par
(000)
  Value  
 
County of Clark Nevada Airport System, ARB, Series B, 5.75%, 7/01/42 $ 1,825           $ 1,985,089  
       
    3,734,593  
 
New Jersey  — 6.8%  
New Jersey Housing & Mortgage Finance Agency, RB, S/F Housing, Series CC, 5.25%, 10/01/29   1,140   1,188,997  
New Jersey Transportation Trust Fund Authority, RB, Transportation System:          
  Series A, 5.88%, 12/15/38   1,295   1,447,175  
  Series A, 5.50%, 6/15/41   1,000   1,052,660  
  Series AA, 5.50%, 6/15/39   1,485   1,589,084  
Rutgers The State University of New Jersey, Refunding RB:          
  Series J, 5.00%, 5/01/32   625   678,113  
  Series L, 5.00%, 5/01/32   385   417,717  
       
    6,373,746  
 
New York  — 5.5%  
Hudson Yards Infrastructure Corp., RB, Series A, 5.75%, 2/15/47   1,000   1,059,300  
New York Liberty Development Corp., Refunding RB, Second Priority, Bank of America Tower at One Bryant Park Project, Class 3, 6.38%, 7/15/49   605   640,919  
New York State Dormitory Authority, ERB, Series B, 5.25%, 3/15/38   3,250   3,442,887  
       
    5,143,106  
 
Ohio  — 3.8%  
County of Allen Ohio Hospital Facilities, Refunding RB, Catholic Healthcare Partners, Series A, 5.25%, 6/01/38   1,565   1,594,563  
Ohio Higher Educational Facility Commission, Refunding RB, Kenyon College Project, 5.00%, 7/01/37   140   142,787  
Ohio State Turnpike Commission, RB, Junior Lien, Infrastructure Projects, Series A-1:          
  5.25%, 2/15/30   790   852,576  
  5.25%, 2/15/31   885   950,871  
       
    3,540,797  
 
 
Municipal Bonds Par
(000)
  Value  
 
Pennsylvania  — 3.8%  
Pennsylvania Economic Development Financing Authority, RB, American Water Co. Project, 6.20%, 4/01/39 $ 500 $ 544,290  
Pennsylvania Turnpike Commission, RB, Sub-Series A:          
  5.63%, 12/01/31   1,250   1,339,912  
  6.00%, 12/01/41   1,500   1,626,495  
       
    3,510,697  
 
Texas  — 14.0%  
Central Texas Regional Mobility Authority, Refunding RB, Senior Lien, 6.00%, 1/01/41   1,670   1,705,872  
City of Beaumont Texas, GO, Certificates of Obligation, 5.25%, 3/01/37   745   806,641  
Conroe Texas ISD, GO, School Building, Series A, 5.75%, 2/15/35   890   993,231  
County of Tarrant Texas Cultural Education Facilities Finance Corp., RB, Scott & White Healthcare, 6.00%, 8/15/45   1,905   2,169,890  
Lower Colorado River Authority, Refunding RB:          
  5.50%, 5/15/19 (a)   90   109,074  
  5.50%, 5/15/33   1,910   2,052,028  
North Texas Tollway Authority, RB, Special Projects, Series A, 5.50%, 9/01/41   1,000   1,079,720  
North Texas Tollway Authority, Refunding RB, First Tier, Series K-1 (AGC), 5.75%, 1/01/38   1,000   1,094,050  
Red River Education Financing Corp., RB, Texas Christian University Project, 5.25%, 3/15/38   340   367,955  
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   1,505   1,624,060  
Waco Educational Finance Corp., Refunding RB, Baylor University, 5.00%, 3/01/43   1,000   1,019,730  
       
    13,022,251  
 
Virginia  — 1.7%  
City of Lexington Virginia IDA, RB, Washington & Lee University, 5.00%, 1/01/43   280   293,558  
           

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20133
 

Schedule of Investments (continued) BlackRock Municipal Income Investment Trust (BBF)
  (Percentages shown are based on Net Assets)

 

Municipal Bonds Par
(000)
  Value  
 
Virginia (concluded)  
Virginia Public School Authority, RB, School Financing, 6.50%, 12/01/18 (a) $ 1,000           $ 1,266,700  
       
    1,560,258  
 
Wisconsin  — 1.8%  
Wisconsin Health & Educational Facilities Authority, Refunding RB, Froedtert & Community Health, Inc., Series C, 5.25%, 4/01/39   1,675   1,719,337  
 
Total Municipal Bonds101.1%   94,430,653  
 
 
Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts (b)
 
California  — 21.1%  
California Educational Facilities Authority, RB, University of Southern California, Series B, 5.25%, 10/01/39 (c)   1,995   2,136,505  
Grossmont Union High School District, GO, Election of 2008, Series B, 5.00%, 8/01/40   2,400   2,474,664  
Los Angeles Community College District California, GO, Election of 2008, Series C, 5.25%, 8/01/39 (c)   2,630   2,836,297  
Los Angeles Community College District California, GO, Refunding, Election of 2008, Series A, 6.00%, 8/01/33   3,898   4,489,469  
Los Angeles Unified School District California, GO, Series I, 5.00%, 1/01/34   400   415,500  
San Diego Public Facilities Financing Authority Water, RB, Series B, 5.50%, 8/01/39   4,214   4,574,401  
University of California, RB, Series O, 5.75%, 5/15/34   1,500   1,693,705  
University of California, Refunding RB, Limited Project, Series G, 5.00%, 5/15/37   1,000   1,048,939  
       
    19,669,480  
 
District of Columbia  — 3.8%  
District of Columbia, RB, Series A, 5.50%, 12/01/30 (c)   1,395   1,563,944  
           
Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts (b) Par
(000)
  Value  
 
District of Columbia (concluded)  
District of Columbia Water & Sewer Authority, Refunding RB, Senior Lien, Series A, 5.50%, 10/01/39 $ 1,799 $ 1,933,954  
       
    3,497,898  
 
Illinois  — 3.3%  
Illinois Finance Authority, RB, University of Chicago, Series B, 6.25%, 7/01/38   2,800   3,090,052  
 
Nevada  — 5.5%  
County of Clark Nevada Water Reclamation District, GO:          
  Limited Tax, 6.00%, 7/01/38   2,500   2,835,300  
  Series B, 5.50%, 7/01/29   1,994   2,286,558  
       
    5,121,858  
 
New Hampshire  — 1.3%  
New Hampshire Health & Education Facilities Authority, RB, Dartmouth College, 5.25%, 6/01/39 (c)   1,094   1,190,349  
 
New Jersey  — 4.1%  
New Jersey Transportation Trust Fund Authority, RB, Transportation System:          
  Series A (AMBAC), 5.00%, 12/15/32   2,000   2,097,640  
  Series B, 5.25%, 6/15/36 (c)   1,640   1,724,314  
       
    3,821,954  
 
New York  — 13.6%  
City of New York New York Municipal Water Finance Authority, RB, Water & Sewer System, Fiscal 2009, Series A, 5.75%, 6/15/40   1,410   1,567,890  
City of New York New York Municipal Water Finance Authority, Refunding RB, Water & Sewer System:          
  Series FF, 5.00%, 6/15/45   1,500   1,554,712  
  Series FF-2, 5.50%, 6/15/40   1,995   2,135,633  
City of New York New York Transitional Finance Authority, BARB, Series S-3, 5.25%, 1/15/39   1,500   1,644,150  
New York Liberty Development Corp., RB, 1 World Trade Center Port Authority Construction, 5.25%, 12/15/43   2,205   2,301,116  
           

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20134
 

Schedule of Investments (continued) BlackRock Municipal Income Investment Trust (BBF)
  (Percentages shown are based on Net Assets)

 

Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts (b) Par
(000)
  Value  
 
New York (concluded)  
New York Liberty Development Corp., Refunding RB, 4 World Trade Center Project, 5.75%, 11/15/51 (c) $ 1,300         $ 1,387,789  
New York State Dormitory Authority, ERB, Series B, 5.25%, 3/15/38   2,000   2,118,700  
       
    12,709,990  
 
Texas  — 5.6%  
City of San Antonio Texas Public Service Board, Refunding RB, Electric and Gas System, Series A, 5.25%, 2/01/31 (c)   2,025   2,238,569  
Harris County Cultural Education Facilities Finance Corp., RB, Texas Children's Hospital Project, 5.50%, 10/01/39   2,750   3,020,600  
       
    5,259,169  
 
Virginia  — 1.0%  
County of Fairfax Virginia IDA, Refunding RB, Health Care, Inova Health System, Series A, 5.50%, 5/15/35   899   956,147  
 
Total Municipal Bonds Transferred to Tender Option Bond (TOB) Trusts59.3%   55,316,897  
 
Total Long-Term Investments
(Cost — $141,184,290) — 160.4%
  149,747,550  
 
Short-Term Securities
Shares
  Value  
 
   
FFI Institutional Tax-Exempt Fund, 0.03% (d)(e)   2,619,714 $ 2,619,714  
 
Total Short-Term Securities
(Cost — $2,619,714) — 2.8%
  2,619,714  
 
Total Investments
(Cost — $143,804,004*) — 163.2%
  152,367,264  
Other Assets Less Liabilities5.7%   5,371,444  
Liability for TOB Trust Certificates, Including Interest Expense and Fees Payable(32.3%)   (30,188,083 )
VRDP Shares, at Liquidation Value(36.6%)   (34,200,000 )
       
Net Assets Applicable to Common Shares100.0% $ 93,350,625  
 
* As of October 31, 2013, gross unrealized appreciation and depreciation based on cost for federal income tax purposes were as follows:

 
Tax cost $ 114,156,083  
   
Gross unrealized appreciation $ 9,136,702  
Gross unrealized depreciation   (1,107,895 )
   
Net unrealized appreciation $ 8,028,807  
   
               
   

Notes to Schedule of Investments

(a) US 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) Represent bonds transferred to a TOB. In exchange the Trust acquired residual interest certificates. These bonds serve as collateral in a financing transaction.
(c) All or a portion of security is subject to a recourse agreement, which may require the Trust to pay the liquidity provider in the event there is a shortfall between the TOB trust certificates and proceeds received from the sale of the security contributed to the TOB trust. In the case of a shortfall, the aggregate maximum potential amount the Trust could ultimately be required to pay under the agreements, which expire from October 1, 2016 to November 15, 2019 is $7,865,394.
(d) Investments in issuers considered to be an affiliate of the Trust during the period ended October 31, 2013, 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, 2013
  Net
Activity
  Shares
Held at
October 31, 2013
  Income  
 
  FFI Institutional Tax-Exempt Fund   4,710,703   (2,090,989)   2,619,714 $ 290  
 
                                           
(e) Represents the current yield as of report date.
   

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20135
 

Schedule of Investments (continued) BlackRock Municipal Income Investment Trust (BBF)

 

Portfolio Abbreviations

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated according to the following list:
   

 

AGC Assured Guarantee Corp.
AGM Assured Guaranty Municipal Corp.
AMBAC American Municipal Bond Assurance Corp.
ARB Airport Revenue Bonds
BARB Building Aid Revenue Bonds
ERB Education Revenue Bonds
GARB General Airport Revenue Bonds
GO General Obligation Bonds
IDA Industrial Development Authority
IDB Industrial Development Board
ISD Independent School District
LRB Lease Revenue Bonds
RB Revenue Bonds
S/F Single Family

 



Financial futures contracts as of October 31, 2013 were as follows:

 

 
Contracts
Sold
Issue Exchange Expiration Notional
Value
  Unrealized
Depreciation
 
 
(57) 10-Year US Treasury Note Chicago Board of Trade December
2013
$ 7,259,484      $ (4,515)  
 
   

Fair Value Measurements - Various inputs are used in determining the fair value of investments and derivative financial instruments. These inputs to valuation techniques are categorized into a disclosure 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.

Changes in valuation techniques may result in transfers into or out of an assigned level within the disclosure hierarchy. In accordance with the Trust's policy, transfers between different levels of the fair value disclosure 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 investment and derivative financial instrument 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, please refer to the Trust's most recent financial statements as contained in its annual report.


BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20136
 

Schedule of Investments (concluded) BlackRock Municipal Income Investment Trust (BBF)

 

The following tables summarize the Trust's investments and derivative financial instruments categorized in the disclosure hierarchy as of October 31, 2013:

 
  Level 1   Level 2   Level 3   Total  
 
Assets:    
Investments:  
  Long-Term Investments 1   $ 149,747,550   $ 149,747,550  
  Short-Term Securities $ 2,619,714       2,619,714  
Total $ 2,619,714 $ 149,747,550   $ 152,367,264  
 
                                 

 

1 See above Schedule of Investments for values in each state or political subdivision.

 

 
  Level 1   Level 2   Level 3   Total  
 
Derivative Financial Instruments 2  
Liabilities:  
Interest rate contracts $ (4,515 )   $ (4,515 )
                               

 

2 Derivative financial instruments are financial futures contracts, which are valued at the unrealized appreciation/depreciation on the instrument.
Certain of the Trust's assets and/or liabilities are held at carrying amount, which approximates fair value for financial reporting purposes. As of October 31, 2013, such assets and/or liabilities are categorized within the disclosure hierarchy as follows:

 

 
  Level 1   Level 2   Level 3   Total  
 
Assets:    
  Cash $ 5,210     $ 5,210  
  Cash pledged for financial futures contracts   101,000       101,000  
Liabilities:    
  TOB trust certificates   $ (30,182,374 )   (30,182,374)  
  VRDP Shares     (34,200,000 )   (34,200,000)  
   
   
Total $ 106,210 $ (64,382,374 ) $ (64,276,164)  
   
                                   


There were no transfers between levels during the period ended October 31, 2013.

 

BLACKROCK MUNICIPAL INCOME INVESTMENT TRUSTOCTOBER 31, 20137
 

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 Income Investment Trust
     
  By: /s/ John M. Perlowski
    John M. Perlowski
    Chief Executive Officer (principal executive officer) of
    BlackRock Municipal Income Investment Trust
     
  Date: December 23, 2013
     
  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 Income Investment Trust
     
  Date: December 23, 2013
     
  By: /s/ Neal J. Andrews
    Neal J. Andrews
    Chief Financial Officer (principal financial officer) of
    BlackRock Municipal Income Investment Trust
     
  Date: December 23, 2013