Futures flat as markets await PCE data and Nvidia earnings

U.S. stock futures were flat Wednesday as investors awaited July inflation data and Nvidia's quarterly earnings, with S&P 500 futures down 0.1% and Nasdaq-100 futures slipping 0.2%. The PCE price index, the Fed's preferred inflation gauge, is expected to show a 0.1% monthly rise and 3.6% annual increase for July. Nvidia, now the S&P 500's top constituent with a valuation above $5 trillion, is forecast to report earnings of $2.09 per share on revenue of $92.28 billion. Brent crude fell over 2% to $85.10 a barrel, down more than 9% this week amid stalled Middle East talks. Fed Chair Kevin Warsh is scheduled to speak Friday at Jackson Hole, though analysts expect limited rate guidance.