Portfolio Update

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST plc

All information is at 31 March 2015 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%  -2.8%  -16.0%  -16.5%  -21.3%  -21.4%
Share price      -2.9%  -2.2%  -15.7%  -16.2%  -21.9%  -21.7%

Sources: Datastream, BlackRock

At month end
Net asset value - capital only:           83.83p
Net asset value - cum income*:            84.04P
Share price:                              86.00p
Premium to NAV (cum income):                2.3%
Net yield:                                  7.0%
Gearing - cum income:                       4.7%
Total assets^^:                           £93.2m
Ordinary shares in issue:            106,858,000
Gearing range (as a % of net assets):      0-20%
Ongoing charges**                           1.5%

*Includes net revenue of 0.21p.
^^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 2014.

Sector                    % Total    Country           % Total
Analysis                   Assets    Analysis           Assets
Integrated Oil               33.0    Global               39.3
Diversified                  19.8    USA                  22.0
Exploration & Production     12.6    Canada               14.0
Copper                        8.8    Europe                8.6 
Gold                          6.5    Africa                7.0
Distribution                  4.7    Latin America         3.2
Nickel                        3.8    Asia                  2.5
Coal                          3.3    China                 2.4
Silver                        2.5    Australia             1.9
Oil Sands                     2.0    Current Liabilities  (0.9)
Oil Services                  1.5                        -----
Agriculture Science           1.1                        100.0 
Diamonds                      0.6                        =====
Iron Ore                      0.4
Fertilizers                   0.3
Current Liabilities          (0.9)
                            -----
                            100.0
                            =====

Ten Largest Equity Investments(in % of Total Assetsorder)

                                       % Total
Company            Region of Risk      Assets
Chevron            Global              6.4
Exxon Mobil        Global              6.2
BHP Billiton       Global              6.2
Rio Tinto          Global              5.8
Enbridge Income    Canada              4.7
Royal Dutch Shell  Global              4.6
Eni                Europe              3.4
ConocoPhillips     USA                 3.3
Glencore           Global              3.3
Total              Europe              3.1

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

The mining and energy sectors came under pressure during March as both mined
commodity and oil prices fell. Economic data from China continued to be weaker
than expected with property prices showing year on year declines across almost
all major cities. The US dollar also continued to perform well during the month
and remained a significant headwind for commodity prices.

Commodities with the greatest exposure to Chinese fixed asset spend suffered
the most during the month with iron down by over 14% as the combination of soft
demand and continued supply growth overwhelmed the market. There are a number
of base metals where the supply surplus should be eroded in the next 12-18
months, notably zinc and copper, but if the Chinese economic data continues to
disappoint, there is still likely to be volatility in these commodities in the
near-term.

In the portfolio we added to a mid-cap energy company with a strategic position
in the Permian basin the US and funded this from the sale of an oil services
company where the outlook for the sector is becoming increasingly challenged as
pricing pressure continues. We also added to a Latin American focused precious
metals company as the shares had underperformed following a merger announcement
that we believe will add value in the medium term for shareholders and benefit
from diversification to a multi-mine producer.

17 April 2015

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.