Stock Market Today, Aug. 6: Trade Desk Plummets After Hours on Weak Q2 Results

The Trade Desk (TTD) cratered 22% in after-hours trading following second-quarter earnings that missed Wall Street estimates and guidance that fell sharply short of expectations. The ad-tech platform guided third-quarter revenue to $650 million, nearly 20% below the Street's $805 million consensus and marking a projected 12% year-over-year decline.

The selloff highlights mounting pressure in programmatic advertising as the company's growth trajectory reversed. Competitor Magnite rallied 17.66% in the same session, underscoring a sharp divergence within the sector and raising questions about whether The Trade Desk's struggles reflect company-specific execution issues or a broader shift in ad-spend patterns.

The gap between The Trade Desk's outlook and analyst expectations—$155 million—represents one of the largest guidance misses in recent quarters for a major ad-tech name. The after-hours move erased significant market cap and may trigger downgrades as sell-side analysts reassess growth assumptions heading into the back half of the year.