S&P 500 futures rose 0.3% on Tuesday evening, supported by Advanced Micro Devices’ quarterly results, while Nasdaq 100 futures gained 0.5%. AMD’s revenue comfortably exceeded analysts’ expectations and its data-center revenue nearly doubled year over year, sending the stock up more than 10% after the close. Investors expect Democrats to take control of the House and assign them more than a 70% chance of winning the Senate as results from the 2026 U.S. midterm elections begin to arrive. A Democratic Senate majority could weigh on artificial-intelligence stocks because of the risk of restrictions on data centers, although market history suggests a subsequent recovery. After the Nasdaq Composite gained nearly 1% on Tuesday, the S&P 500 rose 0.3%, while the Dow Jones Industrial Average fell 0.5%.
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