S&P 500 futures lower as Nvidia dips ahead of earnings midweek

U.S. stock-index futures are lower as investors returned from theholiday weekend in cautious mood amid earnings reports shedding more light on consumers, with crucial earnings still to come from AI-darling Nvidia.How are stock-index futures trading S&P 500 futures ES00, -0.35%dipped 15 points, or 0.3% to 5004 Dow Jones Industrial Average futures YM00, -0.35%fell 128 points, or 0.3% to 38,569 Nasdaq 100 futures NQ00, -0.41%eased 67 points, or 0.3% to 17676On Friday, the Dow Jones Industrial A