The selling that has caused the stock to finish lower for four out of the past five trading days has taken FCX to the edge of technically oversold territory.
Boeing led Dow components with a 3.4% gain, while American Express was the only member of the 30-stock index to finish in the red after the company said Monday it will fight an antitrust suit from the Department of Justice.
This descending trendline has kept a tight lid on BKS since July 2007, with the stock managing just one monthly finish above this level in the intervening years.