"Stock Market Today: Live Updates on Dow Jones Futures, Earnings Movers, and U.S. Debt Downgrade"

U.S. stock futures fell after Fitch downgraded the U.S.'s long-term ratings, citing expected fiscal deterioration. Traders also assessed the latest batch of second-quarter earnings results. Advanced Micro Devices rose 2% after reporting better-than-expected quarterly results, while SolarEdge Technologies tumbled 12% after missing revenue expectations. Earnings season is more than halfway over, with results coming in stronger than expected. The lackluster first day of trading in August saw the S&P 500 decline 0.27% and the Nasdaq Composite decline 0.43%. Fitch's downgrade and ongoing market volatility have contributed to investor sentiment.