US stock futures turned higher Friday after the week's latest bout of turbulence, while bitcoin kept tumbling to hit a multimonth low as AI worries continued to weigh on investors. Contracts on the tech-heavy Nasdaq 100 (NQ=F) rose 0.4%, while those on the S&P 500 (ES=F) gained 0.5%. Dow Jones Industrial Average futures (YM=F) led the way higher, gaining 0.7%. Stocks closed sharply lower on Thursday in a remarkable turnabout. US equities perked up in premarket after the New York Fed president, John Will ...