Super Micro Computer (SMCI), a prominent AI server manufacturer and previously one of the biggest market winners of 2024, has experienced a dramatic decline, becoming the biggest loser in the S&P 500 this year. The company’s shares plummeted nearly 33% on Wednesday following the resignation of its auditor, Ernst & Young, which expressed doubts about the board’s integrity. The stock continued to slide on Thursday, dropping over 10%.

  • Auditor Resignation: Ernst & Young resigned due to a lack of confidence in the board’s integrity, significantly impacting investor confidence and the stock price.
  • Market Performance: Despite a strong start in 2024, SMCI’s year-to-date gains have nearly evaporated, with the stock only up 0.7% as of October 30, after a peak increase of 16.2% earlier in the month.
  • Index Impact: SMCI joined the S&P 500 on March 18 for 100.07, shortly after achieving record highs. However, ongoing concerns about the company’s accounting practices and a recent short-seller report have led to a sharp decline.
  • Competitive Landscape: In contrast, Nvidia, a partner of SMCI and another major AI technology firm, has seen its stock rise by 181.4% as of October 30, making it the second-best performer in the S&P 500.

The rapid decline of Super Micro’s stock highlights the volatile nature of tech stocks and the impact of governance issues on investor sentiment. As the situation unfolds, the company’s future in the S&P 500 remains uncertain, with potential long-term implications for its position in the market.