Stock Market Today: Dow, S&P 500, Nasdaq Fall; Micron, SK Hynix, Nvidia, Intel, More Movers

The Dow, S&P 500, and Nasdaq fell Monday as chip stocks weighed on indexes and oil prices surged amid escalating U.S.-Iran tensions. The Nasdaq dropped 1.5%, the S&P 500 declined 0.8%, and the Dow closed lower.

Semiconductor names drove the selloff. Micron, SK Hynix, Nvidia, and Intel all moved as chip sector weakness rippled through tech-heavy indexes. The sector's underperformance came as the broader market digested geopolitical risk, with crude prices climbing on reports of recent attacks between Washington and Tehran.

The three major indexes opened the week in the red, with the technology sector bearing the brunt of selling pressure. The Nasdaq's 1.5% decline marked the steepest loss among the benchmark gauges, reflecting its heavier exposure to semiconductor and chip-related names.

Oil's advance added a layer of complexity to the trading session, introducing inflation concerns as energy costs climbed. The move higher in crude came directly in response to the latest exchange of hostilities in the Middle East, raising the specter of supply disruption.