U.S. stock markets experienced a downturn on January 7, 2025, primarily driven by a sharp decline in Nvidia's shares. The Nasdaq Composite Index fell by 1.9%, leading the losses on Wall Street. This drop in Nvidia's stock significantly impacted investor sentiment, contributing to the overall decline in the market. Other indices also reflected the negative trend, with the Nasdaq reported to be down by 2% at one point during the trading day.