Stock Market Today, July 17: Stocks Slide as Semiconductor Rout Deepens

Major stock indices declined on July 17, 2026, as a semiconductor sell-off deepened amid geopolitical tensions and concerns about AI spending sustainability. The Nasdaq fell 1.40%, S&P 500 dropped 1.01%, and Dow Jones slipped 0.77%. Travelers Companies surged 9% on strong earnings, while chip stocks including Nvidia, AMD, and Intel tumbled. The PHLX Semiconductor Index has fallen over 13% in the past month despite being up 63% year-to-date.