REG-BlackRock Com: Net Asset Value(s)

NET ASSET VALUE

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST PLC

The unaudited net asset value for BlackRock Commodities Income Investment Trust
plc at close of business on 8 May 2009 was:

106.86p Capital only (undiluted)

107.72p Including current year income (undiluted)

106.86p Capital only (diluted NAV incorporating treasury shares)

107.72p Including current year income (diluted NAV incorporating treasury
shares)

Notes:

1. Investments have been valued on a bid price basis.

2. Revenue items included in net asset value, with dividends payable deducted
on the ex-dividend date.

3. The unaudited NAV above has been calculated based on 73,825,662 shares.

4. Following the resale of 250,000 shares out of treasury on 29 April 2009,
there are 1,774,338 shares held in treasury.

5. For the latest daily net asset value, previous month end performance
statistics, asset allocation and ten largest holdings of the BlackRock managed
Investment Trusts, see BLRKINDEX on Reuters or page 8800 on ICB (Topic 3).

END