Shares fell as much as 13% after the miner and commodities trader was told by US Department of Justice to produce documents on Nigeria, Congo and Venezuela.
It is not the first time Chinalco, China's biggest state-owned aluminium producer, has run afoul of the country's ever stricter environmental regulations.
BP Plc plans to acquire the U.K.’s largest electric vehicle charging company, the latest in a string of acquisitions by major oil companies in the growing market for greener transport.