Stock market today: S&P 500, Nasdaq poised to add to tech sell-off as Google sinks, Amazon looms, silver tanks

US stock futures turned lower on Thursday in an apparently fruitless search for a reprieve from a two-day tech sell-off as investors waited for Amazon earnings and assessed Alphabet's big AI spending plans. S&P 500 futures (ES=F) moved roughly 0.6% lower, while those on the Nasdaq 100 (NQ=F) shed 0.9%. Contracts on the Dow Jones Industrial Average futures (YM=F), which includes fewer tech names, edged about 0.3% lower. The market is in the midst of a trillion-dollar tech wipeout, as investors weigh whet ...