BlackRock Commodities Income Investment Trust plc is a closed-ended equity mutual fund launched by BlackRock Fund Managers Limited and managed by BlackRock Investment Management (UK) Limited. It invests in public equity markets worldwide, focusing on value stocks of companies in the mining and energy sectors. Its portfolio is benchmarked against a composite index of 50% Euromoney Global Mining Index and 50% MSCI World Energy Index. Formerly known as Merrill Lynch Commodities Income Investment Trust Plc, the fund was formed on December 13, 2005 and is domiciled in the United Kingdom.