US stock index futures rise, Nvidia's prospects ease concerns about artificial intelligence

US stock index futures rose, Nvidia's better-than-expected financial report revived people's confidence in the artificial intelligence industry. S&P 500 index futures rose by 0.9%, and Nasdaq 100 index rose by 1.4%. The S&P 500 index rose by 0.4% on Wednesday, and the Nasdaq 100 index rose by 0.6%.