Stock futures are little changed Tuesday night after major U.S. indexes extended their losses, driven again by pressure in tech shares. Investors are now readying for Nvidia's earnings report to inform the strength of the AI trade. Futures tied to the Dow Jones Industrial Average rose 36 points, hovering near the flatline. S&P futures and Nasdaq 100 futures both added less than 0.1%. Tuesday's session saw the Dow Jones Industrial Average and S&P 500 notch their fourth consecutive losing days,