These Were the 5 Worst-Performing Stocks in the S&P 500 in August 2025

Core Viewpoint - A new AI trend may provide investment opportunities for stocks that underperformed in August, particularly Super Micro Computer, which has shown strong growth potential in the AI infrastructure sector [1][15]. Group 1: August Stock Performance - The S&P 500 historically performs poorly in September, with stocks often declining [1]. - Five stocks, including The Trade Desk, Super Micro Computer, Gartner, Fortinet, and Coinbase, were the worst performers in August, with declines ranging from 19% to 37% [2][4]. Group 2: Reasons for Declines - All five stocks experienced declines following their quarterly financial results, indicating that earnings reports were a common trigger for the downturn [6]. - The Trade Desk's stock fell due to disappointing Q3 2025 revenue guidance of only 14% growth and a sudden CFO change [7]. - Super Micro Computer reported a 47% year-over-year increase in net sales, but its gross margin fell to 9.5%, causing investor concern [8]. - Gartner's stock dropped despite beating earnings expectations, as management projected only 2% growth for the year, signaling limited upside [9]. - Fortinet's stock declined due to concerns over its growth amid a product refresh cycle, which management attempted to downplay [11]. - Coinbase's revenue decline and rising expenses, particularly in transaction revenue, led to a negative outlook for Q3 [12]. Group 3: Investment Opportunities - Super Micro Computer is highlighted as a potential buying opportunity due to its strong demand for AI infrastructure, with management expecting at least 50% growth in fiscal 2026 [15]. - The stock is considered undervalued at 24 times earnings, which is lower than the S&P 500 average, despite its high growth rate [16]. - Improvement in Super Micro's gross margin, projected to recover to 15%-16%, could significantly enhance profitability and stock performance [17][18].