The Bank of America planned to finish the transaction on June 5,under an agreement it signed in 2005 with Central Huijin Investment, an investment arm of the government.
It would reduce Huijin's CCB stake to 65.4 percent, and boost Bank of America's share to 10.75 percent, or 25.1 billion H-shares, said the announcement.
The shares purchased under the option may not be sold until Aug. 29, 2011, without CCB's written agreement.