Stock market today: Dow, S&P 500, Nasdaq futures retreat ahead of Fed meeting amid AI safety fears

US stocks fell for a second day in a row on Tuesday as investors braced for the Federal Reserve's interest rate decision on Wednesday and monitored the fallout from Anthropic CEO Dario Amodei's essay on AI safety fears. The tech-heavy Nasdaq Composite (^IXIC) declined 0.8% while the Dow Jones Industrial Average (^DJI) dropped 0.7%. The S&P 500 (^GSPC) tumbled more than 0.4%.Oil prices ticked back up, with Brent crude (BZ=F) and WTI crude (CL=F) changing hands at $108 and $105 per barrel, respectively.