Shares of AMC Entertainment Holdings Inc. /zigman2/quotes/200235402/composite AMC +5.35% dropped 9.3% in premarket trading Thursday, after tumbling 20.5% amid a four-day losing streak. Fellow meme stock GameStop Corp. /zigman2/quotes/203755179/composite GME +6.74% was also extending recent losses, as it shed 5.3% ahead of the open, after losing 11.0% over the past four days. A five-day losing streak would be the longest such stretch for AMC's stock since the 8-day losing streak ended May 6, and the longest losing stretch for GameStop's stock since the five-day losing streak that ended May 5. The stocks' selloffs are part of a broader-market selloff, as Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA +0.91% futures /zigman2/quotes/210407078/delayed YM00 +0.81% slid 474 points, or 1.4%, and futures /zigman2/quotes/209948968/delayed ES00 +0.96% for the S&P 500 /zigman2/quotes/210599714/realtime SPX +1.07% sank 1.3%. Among other meme stocks, the U.S.-listed shares of BlackBerry Ltd. /zigman2/quotes/202784246/composite BB +2.24% /zigman2/quotes/206834662/delayed CA:BB +1.53% fell 3.3% in Thursday's premarket, Express Inc. /zigman2/quotes/210459169/composite EXPR -1.49% dropped 6.5% and Nokia Corp. /zigman2/quotes/207421390/composite NOK +0.63% slipped 0.7%.