Portfolio Update

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST plc

All information is at 30 April 2014 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   3.5%    9.5%     2.3%   4.6%   -16.6%   46.8%
Share price       4.4%   12.0%      4.5%  3.7%   -15.0%   45.7%

Sources: Datastream, BlackRock

At month end
Net asset value - capital only:           110.03p
Net asset value - cum income*:            110.77p
Share price:                              113.75p
Premium to NAV (cum income):                 2.7%
Net yield:                                   5.2%
Gearing - cum income:                        7.0%
Total assets^:                            £118.5m
Ordinary shares in issue:              99,858,000**
Gearing range (as a % of net assets):       0-20%

*Includes net revenue of 0.74p.
^includes current year revenue.
**following the issue of a further 900,000 shares since 30 April 2014, the Company
has 100,758,000 shares in issue.

Sector                   % Total   Country            % Total
Analysis                  Assets   Analysis            Assets
Integrated Oil            36.4     Global                40.3
Diversified               20.6     Canada                21.8
Exploration & Production  12.5     USA                   16.6
Copper                     7.7     Europe                 9.2 
Oil Sands                  5.4     Latin America          8.1
Gold                       5.3     Africa                 3.8
Oil Services               4.1     Asia                   3.5
Iron Ore                   3.3     Australia              2.9
Distribution               2.9     China                  1.0
Coal                       2.6     Current liabilities   (7.3)
Nickel                     2.2                          -----
Aluminium                  1.5                          100.0
Silver                     1.0                          =====
Uranium                    0.9
Platinum                   0.5
Fertilizers                0.3
Current liabilities       (7.3)
                         -----
                         100.0
                         =====

Ten Largest Equity Investments(in alphabetical order)

Company                  Region of Risk
BHP Billiton             Global
BP                       Global
Canadian Oil Sands       Canada
Chevron                  Global
ConocoPhillips           USA
ExxonMobil               Global
Rio Tinto                Global
Royal Dutch Shell        Global
Statoil                  Europe
Total                    Global

Commenting on the markets, Olivia Markham and Tom Holl, representing the Investment
Manager noted:

Solid performance across both the energy and mining sectors during April
resulted in the Company's share price returning 4.4% during the month; NAV
total return was 3.5%. At the end of April the Company's shares were trading at
a 2.7% premium to their net asset value. The energy sector rose by 3.7% (MSCI
World Energy Index)during the month, versus an increase of 0.3% for the mining
sector (Euromoney Global Mining Index), with the portfolio benefiting from its
overweight exposure to energy (all data in £ Sterling terms).

In the mining sector, with the exception of nickel, most of the industrial
metals (copper, aluminium and lead) were broadly flat during the month.
Indonesia's ban on the export of raw materials including nickel-bearing ore to
China, has significantly tightened the nickel market with the nickel price
rising by a further 15.4% during April, now up by 32% year-to-date. There are
two nickel producers held in the portfolio which also benefits from the nickel
exposure of some of the diversified mining companies. Ongoing financing risk
concerns in China, coupled with record iron ore inventory levels at Chinese
ports, saw the iron ore price decline by US$12/t to US$105/t during the month,
with iron ore exposed equities subsequently coming under pressure.

During April a number of the integrated oil & gas producers reported first
quarter results. In general, the results were received positively by the
market, with many of the companies exceeding analysts' expectations, showing
improved capital discipline and continuing to raise dividends. Two key holdings
in the portfolio, Royal Dutch Shell and Statoil, benefited from the ongoing
strength in the Henry Hub gas price (currently trading at approximately US$4.75
/mmbtu), with higher gas price realisations and gas trading largely responsible
for the increased earnings.

14 May 2014

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.