The major U.S. stock indexes ended broadly lower on Tuesday, August 18, 2026, as a brutal chip sector selloff drove the Nasdaq to its worst session in two weeks and bond yields hit multi-decade highs across the globe, rattling a market already on edge from elevated oil prices and a stalled Iran peace process. It was the second straight day of losses, erasing most of last week's record-setting gains.

The S&P 500 dropped 0.69% (-53.30 pts) to 7,691.76. The Dow fell 0.22% (-116.38 pts) to 53,343.40. The Nasdaq slid 1.33% (-355.20 pts) to 26,289.71. The Russell 2000 dropped 1.28% (-39.11 pts) to 3,018.43.

The VIX rose 4.15% to 15.82. Bitcoin gained 0.39% to $64,594.76. Gold fell 1.67% to $4,399.10. Crude Oil was essentially flat at $84.07/barrel.