Transaction in Own Shares

TRANSACTION IN OWN SHARES

BlackRock Commodities Income Investment Trust plc

The Company announces that 274,338 Ordinary shares of 1p each were today sold
by the Company from the shares held in Treasury at a price of 129.5p per share
which represented a premium to net asset value.

As a result there are currently no Ordinary shares held in Treasury by the
Company at the moment. The number of Ordinary shares that the Company has in
issue following this sale, is 75,600,000.

Contact name for queries:

Barbara Powley - BlackRock Investment Management (UK) Limited
Tel: [phone]

4 June 2010