道瓊斯指數下跌21.63點,或0.04%,報49,170.36點,開盤後 標準普爾500指數下跌27.18點,或0.39%,報6,936.56點,開盤後 納斯達克指數下跌151.30點,或0.64%,報23,558.58點,開盤後