Stock market today: Dow, S&P 500, Nasdaq futures sink, bitcoin plummets in downbeat start to December

US stock futures sank on Monday while bitcoin's (BTC-USD) slump deepened, as Wall Street's strong late-November rebound looked set to hit a speed bump on the first trading day of December. Tech led the retreat, with Nasdaq 100 futures (NQ=F) down around 1% and those on the S&P 500 (ES=F) dropping roughly 0.7%. Contracts on the Dow Jones Industrial Average (YM=F) slid 0.5%, after the blue-chip benchmark led Wall Street indexes to a fifth day of gains on Friday. All the "Magnificent Seven" megacap stocks ...