Portfolio Update

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST PLC

All information is at 31 May 2011 and unaudited.

                        One    Three       Six       One     Three      Five     
                      Month   Months    Months      Year     Years     Years    
                                                                               
Net asset value       -1.7%    -1.7%     10.8%     25.0%     -4.1%     86.2%    
Share price           -3.2%    -4.2%      7.2%     24.0%     -5.1%     84.5%    

Sources: DataStream, BlackRock

At month end                                                                   
                                                                               
Net asset value - capital only:                    149.84p                     
Net asset value - cum income**:                    151.64p                     
Share price:                                       150.50p                     
Premium to NAV (capital only):                        0.4%                     
Net Yield:                                            4.1%                     
Gearing - cum income:                                 3.4%                     
Total assets^:                                    £142.11m                   
Ordinary shares in issue:                       90,508,000                     

**includes net revenue of 1.80p.
^includes current year revenue.

                          % of Total                                 % of Total
Sector Analysis               Assets       Country Analysis              Assets
                                                                               
Integrated Oil                  27.3       Global                          21.1
Diversified                     15.0       USA                             18.8
Exploration & Production        14.1       Canada                          18.4
Copper                           8.2       Europe                          11.1
Coal                             7.3       Asia                            10.0
Oil Services                     4.7       Latin America                    7.8
Aluminium                        3.6       Australia                        5.4
Gold                             3.3       South Africa                     4.7
Iron Ore                         3.2       China                            1.5
Fertiliser                       3.0       Africa                           1.4
Zinc                             2.3       Russia                           0.2
Nickel                           2.0       Current liabilities             (0.4)
Oil Sands                        1.8                                      -----
Distribution                     1.6                                      100.0
Tin                              1.5                                      =====
Platinum                         1.5                                           
Current liabilities             (0.4)                                           
                               -----                                           
                               100.0                                           
                               =====                                           

Ten Largest Equity Investments (in alphabetical order)                         
                                                                               
Company                                   Region of Risk                       
                                                                               
Anadarko Petroleum                        USA                                  
BHP Billiton                              Global                               
Coal & Allied Industries                  Australia                            
ExxonMobil                                Global                               
Freeport McMoRan                          Asia                                 
Kumba Iron Ore                            South Africa                         
Occidental Petroleum                      USA                                  
Rio Tinto                                 Global                               
Statoil                                   Europe                               
Total                                     Global                               

Commenting on the markets, Richard Davis, representing the Investment Manager
noted:

Commodity markets were weaker in May as investor sentiment was driven lower by
a combination of Euro-zone sovereign debt concerns, weaker US economic data and
the potential negative impact of high oil prices on the rate of global economic
growth. Nickel and tin were the worst performers with both metals falling more
than 12% (in US Dollar terms) over the month. On a more positive note, iron ore
prices remained robust at around US$180/t (CIF China). In the precious metals
market, gold and platinum performed relatively well over the period, delivering
broadly flat performance of 0.2% and -0.4% respectively. Meanwhile, the silver
price began to give back some of the strong gains made in retesting the
previous peak of US$50/oz set 30 years ago when the Hunt brothers tried to
corner the market. The white metal declined 21% in May, as COMEX raised margin
requirements. This pushed a number of speculative investors out of the market
thereby reducing some of the `speculative froth'. The HSBC Global Mining Index
fell 3.9% on the month.

In the energy market, crude oil (WTI) prices fell 10% to close at US$103/Bbl.
Growing concerns about demand destruction contributed to the sell-off. It is
important to note, however, that we are now entering a traditionally seasonally
stronger period for oil demand as the refinery maintenance period in the US
comes to an end and the driving season gets underway. Demand elsewhere is
robust: in China, India and Brazil oil demand has increased year-on-year. As
expected, Japan has now also added incremental barrels to oil demand as the
country looks to oil fired power as one of the near term solutions to making up
the reduction in nuclear generation. Energy equities closed the month down
3.9%.

16 June 2011

ENDS

Latest information is available by typing www.blackrock.co.uk/brci on the
internet, "BLRKINDEX" on Reuters, "BLRK" on Bloomberg or "8800" on Topic 3 (ICV
terminal). Neither the contents of the Manager's website nor the contents of
any website accessible from hyperlinks on the Manager's website (or any other
website) is incorporated into, or forms part of, this announcement.