US Stocks Fall as Treasury Yields Rise; Chip Stocks Recover on AI Safety Comments

US equities opened lower on Tuesday, extending prior losses, pressured by rising Treasury yields. Chip and semiconductor shares rebounded after AI industry leaders called for a slowdown in model development due to security risks, a reversal from yesterday's selloff. The Dow fell 0.54% and S&P 500 0.24% by mid-morning, with the yield move the dominant driver.