Portfolio Update

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST plc

All information is at 30 April 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  7.2%     8.4%    -2.2%  -13.5%   -13.0%   -13.9%
Share price      4.9%     3.7%    -4.8%  -15.7%   -14.5%   -14.4%

Sources: Datastream, BlackRock

At month end
Net asset value - capital only:        89.51p
Net asset value - cum income*:         90.11P
Share price:                           90.25p
Premium to NAV (cum income):             0.2%
Net yield:                               6.7%
Gearing - cum income:                    4.1%
Total assets^^:                       £100.3m
Ordinary shares in issue:         106,858,000
Gearing range (as a % of net assets):   0-20%
Ongoing charges**                        1.5%

*Includes net revenue of 0.60p.
^^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             30.8          Global        44.0
Diversified                18.6             USA        22.8
Exploration & Production   14.3          Canada        11.6
Copper                     11.0          Europe         8.8 
Gold                        6.4   Latin America         3.6
Distribution                4.6            Asia         3.3
Nickel                      3.8          Africa         2.9
Silver                      2.6       Australia         1.8
Oil Sands                   2.2           China         1.2
Coal                        2.1  Current Assets         0.0
Oil Services                1.5                       -----
Agriculture Science         1.0                       100.0 
Diamonds                    0.4                       =====
Iron Ore                    0.4
Fertilizers                 0.3
Current Assets              0.0
                          -----
                          100.0
                          =====

Ten Largest Equity Investments(in % of Total Assets order)

                                                     % Total
Company                         Region of Risk        Assets
BHP Billiton                    Global                   6.1
Chevron                         Global                   6.1
ExxonMobil                      Global                   5.9
Rio Tinto                       Global                   5.7
Enbridge Income                 Canada                   4.6
First Quantum Minerals          Global                   4.4
Eni                             Europe                   3.4
Glencore                        Global                   3.4
Freeport-McMoRan Copper & Gold  Asia                     3.3
ConocoPhillips                  USA                      3.3

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

The mining and energy sectors both had a strong month. Both equities and the
underlying commodities rallied as a weaker US dollar and optimism around
stimulus measures in China offset weaker than expected economic data releases
from the world's largest consumer of metals.

Oil prices recovered strongly over the month, with Brent and WTI crudes rising
by 20.2% and 24.9% respectively. Data from the International Energy Agency
showed that global oil demand grew by 1.4% year-on-year during the first
quarter of 2015, with the acceleration led by OECD Americas and OECD Europe.
Meanwhile on the supply side, US oil production began to show the first signs
of rolling over as US daily production fell by ~170,000bbls/day over the month.
Heightened geo-political risk, owing to Saudi Arabia resuming air strikes in
Yemen, provided further support to the oil price.

M&A activity within the sector continued to gain momentum, with RD Shell
announcing an $80bn bid for BG, which represented a 52% premium to BG's 90 day
trading average. On completion of this deal, RD Shell will become the largest
player in the LNG market and will gain some growth projects in Brazil and East
Africa.  This deal, along with Repsol's $8bn acquisition of Talisman and the
$35bn merger of Halliburton and Baker Hughes, are all typical signs of reaching 
the bottom of the industry cylcle.

The base metals had a strong month, bouncing back after a weak March and
benefitting from the dollar weakness; zinc and nickel led the way, rising by 14.2%
and 12.8%, whilst aluminium and copper increased by 8.5% and 5.0% respectively.

Volatility in natural resource equities continues to be high relative to
general equity markets. The Company continued to write options during the month
including calls on a Chinese coal company and puts in one of our favoured gold
companies.

14 May 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.