BLACKROCK COMMODITIES INCOME INVESTMENT TRUST plc                                                                   
                                                                                                                        
    All information is at 30 September 2016 and unaudited.                                                              
                                                                                                                        
    Performance at month end with net income reinvested                                                                 
                                                                                                                        
                                        One      Three                        Six       One        Three           Five 
                                                                                                                        
                                      Month     Months                     Months      Year        Years          Years 
                                                                                                                        
    Net asset value                    6.0%       8.9%                      33.6%     44.8%       -10.7%          -9.0% 
                                                                                                                        
    Share price                        6.1%      18.3%                      27.1%     44.9%       -10.7%          -8.2% 
                                                                                                                        
    Sources: Datastream, BlackRock                                                                                      
                                                                                                                        
    At month end                                                                                                        
                                                                                                                        
    Net asset value - capital only:                                                         76.79p                      
                                                                                                                        
    Net asset value cum income*:                                                            76.37p                      
                                                                                                                        
    Share price:                                                                            75.88p                      
                                                                                                                        
    Discount to NAV (cum income):                                                             0.6%                      
                                                                                                                        
    Net yield:                                                                                7.2%                      
                                                                                                                        
    Gearing - cum income:                                                                     5.9%                      
                                                                                                                        
    Total assets^^:                                                                         £99.0m                      
                                                                                                                        
    Ordinary shares in issue***:                                                       117,968,000                      
                                                                                                                        
    Gearing range (as a % of net assets):                                                    0-20%                      
                                                                                                                        
    Ongoing charges**:                                                                        1.4%                      
                                                                                                                        
    * Includes net revenue of -0.42p.                                                                                   
    ^^ Includes current year revenue.                                                                                   
    ** Calculated as a percentage of average net assets and using expenses,                                             
    excluding any interest costs and excluding taxation for the year ended 30                                           
    November 2015.                                                                                                      
                                                                                                                        
    Sector Analysis                  % Total Assets        Country Analysis                              % Total Assets 
                                                                                                                        
    Integrated Oil                             21.7        Global                                                   50.7
                                                                                                                        
    Exploration & Production                   19.7        USA                                                      21.5
                                                                                                                        
    Diversified Mining                         19.6        Canada                                                    9.2
                                                                                                                        
    Gold                                       12.9        Latin America                                             4.7
                                                                                                                        
    Copper                                      7.7        Australia                                                 3.4
                                                                                                                        
    Silver                                      3.1        Africa                                                    3.1
                                                                                                                        
    Distribution                                2.9        Europe                                                    1.9
                                                                                                                        
    Fertilizers                                 2.5        Sweden                                                    1.2
                                                                                                                        
    Oil Services                                1.9        Asia                                                      0.6
                                                                                                                        
    Diamonds                                    1.7        Net current assets                                        3.7
                                                                                                                        
    Zinc                                        1.2                                                                -----
                                                                                                                        
    Steel                                       1.2                                                                100.0
                                                                                                                        
    Refining & Marketing                        0.2                                                                =====
                                                                                                                        
    Net Current assets                          3.7                                                                     
                                                                                                                        
                                              -----                                                                     
                                                                                                                        
                                              100.0                                                                     
                                                                                                                        
                                              =====                                                                     
                                                                                                                        
    Ten Largest Investments (in %                                                                                       
    of Total Assets order)                                                                                              
                                                                                                                        
    Company                                                Region of Risk                       % Total Assets          
                                                                                                                        
    First Quantum Minerals                                         Global                                  6.9          
                                                                                                                        
    Royal Dutch Shell 'B'                                          Global                                  6.4          
                                                                                                                        
    BHP Billiton                                                   Global                                  6.2          
                                                                                                                        
    Rio Tinto                                                      Global                                  5.7          
                                                                                                                        
    Exxon Mobil                                                    Global                                  4.7          
                                                                                                                        
    BP                                                             Global                                  3.4          
                                                                                                                        
    Newcrest Mining                                             Australia                                  3.0          
                                                                                                                        
    Enbridge Income Fund Trust                                     Canada                                  2.9          
                                                                                                                        
    Glencore                                                       Global                                  2.9          
                                                                                                                        
    Anadarko Petroleum                                                USA                                  2.7          
                                                                                                                        
                                                                                                                        
                                                                                                                        
    Commenting on the markets, Olivia Markham and Tom Holl, representing the                                            
    Investment Manager noted:                                                                                           
                                                                                                                        
    The Company's NAV rose +6.0% during the month, bringing the year to date                                            
    performance to +48.9% (all calculations in US Dollar terms with income                                              
    reinvested).                                                                                                        
                                                                                                                        
    The mining sector performed strongly in September on the back of                                                    
    better-than-expected economic data emerging from China including new bank loans                                     
    rising to Rmb949bn, up +17.1% year-on-year, and the country's steel production                                      
    remaining robust at 68.6 million tonnes, reflecting a +2.5% increase                                                
    year-on-year. Most mined commodities were up over the month with gold, copper                                       
    and nickel prices gaining +1.0%, +5.3% and +8.5% respectively. The nickel price                                     
    was supported by news that the Philippine government had suspended half of the                                      
    country's mining operations for failing to meet social and environmental                                            
    standards. For reference, last year the country produced over 20% of the                                            
    world's mined nickel output. However, it was coking coal which was the star                                         
    performer, rising an extraordinary +54.4% over the month as China's coal                                            
    industry reform programme, which has constrained domestic output to the                                             
    equivalent of 276 days of production, forced Chinese steel producers to turn to                                     
    the import market.                                                                                                  
                                                                                                                        
    The energy sector was buoyed by Brent and WTI oil prices rising +4.4% and +7.7%                                     
    respectively on the back of an announcement from OPEC that it was planning a                                        
    co-ordinated output cut. OPEC announced plans to reduce output to between 32.5                                      
    mbpd and 33 mbpd by year-end which would represent a reduction of between                                           
    240,000 bpd and 740,000 bpd from August's production level and marks the first                                      
    concrete steps by OPEC towards cutting output since 2008. The initial market                                        
    reaction has been one of scepticism and despite moving higher on the                                                
    announcement, Brent is only back to the level it was at in mid-August. Risks                                        
    remain around the execution of the agreement and there are questions over its                                       
    effectiveness if Iran, Libya and Nigeria are able to increase production                                            
    levels. Sceptics also point to historical examples of OPEC announcing                                               
    production targets and subsequently producing above these quotas. We understand                                     
    the market's scepticism and still need to see the deal ratified (and adhered                                        
    to). That said, we see this as a meaningful shift in OPEC's strategy away from                                      
    market share at any price back towards market management. The fact that Saudi                                       
    Arabia drove the deal is key. We have been of the view that the rebalancing                                         
    process is already underway and expected the market to be back in balance by                                        
    2017 even without an OPEC cut. Such action by OPEC would, though, accelerate                                        
    this process and remove the negative tail risk of further meaningful OPEC                                           
    production growth.                                                                                                  
                                                                                                                        
    All data points are in US dollar terms.                                                                             
                                                                                                                        
    21 October 2016                                                                                                     
                                                                                                                        
    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.