U.S. stock futures inched higher on Tuesday, lifted by news that President Donald Trump has authorized Nvidia to resume shipments of high-performance AI chips to China. Investors now await the start of a closely watched Federal Reserve meeting. 

As of 4:27 P.M. (GMT+7), Dow Jones Industrial Average futures ticked up by 0.07%, or 33.50 points, to 47,772.80 points, while S&P 500 futures advanced 0.06%, or 4.00 points, to 6,850.50 points. Nasdaq 100 futures gained 0.02%, or 6.30 points, to 25,634.30 points, recovering some ground after modest declines on Wall Street the previous session.