U.S. equity markets lost more than $1.1 trillion in market capitalization on Friday, Aug. 1, 2025, capping one of the steepest single-day sell-offs of the year, according to market data tallied after the closing bell. The slide was led by declines in megacap technology names. Amazon.com Inc. dropped 8.3%, erasing over $200 billion in value and accounting for a sizeable share of the overall market retreat. Other heavyweight stocks also fell, compounding the broad-based pullback.