Shares of Freeport-McMoRan (FCX) - Get Report finished Thursday in the green, closing higher by 4.64% to $13.31 on heavy trading volume following the end of a copper mine strike in South America.

The three week strike took place at Peru's largest copper mine, Freeport's Cerro Verde. Work will resume there on Friday following a vote that ended the strike, which cut the mine's output in half, Reuters reports.

The union accepted the company's offer to improve family health benefits and pay workers their share of the mine's profits earlier than usual.