Wall Street futures mixed as oil tensions and AI doubts weigh on markets

U.S. stock futures were mixed Tuesday as renewed oil market tensions and weakness in Asian tech stocks threatened to disrupt Wall Street's recovery, with Nasdaq 100 futures falling 150 points, or 0.5%. Brent crude rose toward $111 per barrel following reported attacks in the Gulf region, while investors faced a heavy earnings day spanning autos, industrials, and streaming, alongside September U.S. housing data. General Motors beat third-quarter expectations with $50 billion in revenue and announced a $20 billion buyback, though its stock fell about 7% premarket. Asian markets declined, with South Korea's KOSPI down 3.7% after AI data-center firm Elice dropped 32% on debut, raising doubts about AI investment returns. 3M rose 4% on an expanded Amazon data-center supply deal, while Steel Dynamics fell 6% on missed profit estimates.