These Were the 2 Worst-Performing Stocks in the S&P 500 in August 2025 -- Here's Which One Looks Like a Bargain

In August 2025, The Trade Desk (TTD) and Super Micro Computer (SMCI) were the S&P 500's worst performers, declining 37% and 30% respectively, driven by post-earnings reports. The Trade Desk's drop followed disappointing Q3 guidance and a CFO departure, despite strong Q2 revenue beats, with some market observers suggesting an overreaction to competitive concerns and complex prior-year comparisons. Super Micro Computer's stock fell despite reporting 47% year-over-year revenue growth, attributed to its weakest-ever gross margin.

Analysis

The Trade Desk (TTD) and Super Micro Computer (SMCI) experienced significant valuation pullbacks in August 2025, marking them as the S&P 500's worst performers with declines of 37% and 30%, respectively. These moves were directly precipitated by their earnings reports, indicating heightened investor sensitivity to forward-looking statements and profitability metrics. For The Trade Desk, the sell-off was driven by a combination of disappointing third-quarter guidance and the unexpected departure of its CFO. This occurred despite the company delivering a significant second-quarter revenue beat. The weak guidance may be partially attributable to a challenging year-over-year comparison, as Q3 2024 was positively impacted by political advertising spend. Furthermore, while market fears persist regarding competition from Amazon (AMZN) in the connected TV space, the actual business overlap is suggested to be less substantial than perceived. In contrast, Super Micro Computer's decline occurred despite robust 47% year-over-year revenue growth, as this was overshadowed by the company reporting its weakest gross margin on record, signaling severe market concern over margin compression.

Key Decisions for Investors

• Investors may view the 37% price correction in The Trade Desk as a potential contrarian opportunity, based on the thesis that the market overreacted to temporary guidance headwinds and potentially overstated competitive threats from Amazon.
• For Super Micro Computer, the primary focus should be on scrutinizing the drivers behind its record-low gross margin, as the market is clearly prioritizing profitability and margin stability over the reported 47% top-line growth.
• The unexpected CFO departure at The Trade Desk introduces a governance risk that warrants monitoring, as management stability is critical during a period of perceived growth deceleration and heightened competition.
• The sharp sell-offs in both firms highlight the market's current intolerance for negative forward-looking indicators, suggesting that positions in high-growth stocks require close monitoring of guidance and margin trends, not just historical revenue performance.