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 15 September 2010 was:

126.63p Capital only (undiluted)
128.54p Including current year income (undiluted)

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 75,600,000 shares.

4. Following the sale of 274,338 shares out of treasury on 4 June 2010, there
are 75,600,000 shares in issue. No shares are 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).