Net Asset Value(s)

NET ASSET VALUE

BLACKROCK COMMODITIES INCOME INVESTMENT TRUST PLC.

The unaudited net asset values for BlackRock Commodities Income Investment
Trust plc at close of business 23 May 2012 were:

109.58p Capital only (undiluted)
110.91p Including current year income

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. Following the issue of 100,000 ordinary shares on 22 May 2012, the unaudited
NAV has been calculated based on 93,008,000 ordinary shares in issue, there are
no shares held in treasury.

4. For the latest daily net asset value, previous month end performance
statistics, asset allocation and tem largest holdings of the BlackRock managed
Investment Trusts; see BLRKINDEX on Reuters or page 880 on ICB (Topic 3).