The U.S. stock market has experienced a whirlwind of activity, with major indices showing mixed results as investors assess ongoing trade talks and inflation data. The S&P 500 managed to wipe out its losses for the year, buoyed by gains in tech stocks, particularly Nvidia and AMD, which have led a resurgence in the sector. While the Nasdaq showed positive movement, the Dow struggled under the pressure of significant losses from healthcare giant UnitedHealth. Despite recent gains, futures for the S&P 500 and Dow traded flat as market sentiment fluctuated with trader optimism regarding U.S.-China trade developments and hopes of slowing inflation.