Shares of GameStop Corp. and AMC Entertainment Holdings Inc. tumbled Monday, dealing a blow to the legions of individual investors who have banded around the two stocks and frequently tout them on social media.
GameStop dropped 14% to $136.88 per share, its lowest closing price since March. AMC shares fell 15% to $23.24, their lowest close since May. The broader market was down, with the S&P 500 retreating 0.9% after closing at a record on Friday.