US stock futures edged lower on Thursday evening as investors awaited Federal Reserve Chair Kevin Warsh’s first keynote address as Fed chair at the annual Jackson Hole symposium on Friday. Markets are seeking clues about the central bank’s approach to inflation and interest rates after hotter-than-expected inflation data renewed concerns about its room to ease policy. Treasury yields also remained elevated amid concerns over inflation, government borrowing and monetary policy. Nvidia’s bullish revenue outlook drove an 8.7% gain in Thursday’s regular session, helping lift technology and AI-linked stocks. The S&P 500 rose 0.7%, the Nasdaq Composite gained 1.6% and the Dow Jones Industrial Average advanced 0.2%. In extended trading, Gap rose more than 13% after reporting better-than-expected adjusted second-quarter earnings and naming Michael Francis as CEO of Old Navy, while Marvell Technology fell about 7% after its gross-margin outlook came in below consensus.