Today's Top Stock Declines: Clinical Trials, Earnings Misses, and Legal Probes Drive Selloffs

Font: Financial Modeling Prep  • May 07, 2026

• TRDA (NASDAQ: TRDA), a biotechnology firm, led market declines with a 57.27% drop following the release of clinical trial data for its Duchenne muscular dystrophy treatment.
• Fastly (NYSE: FSLY) and Planet Fitness (NYSE: PLNT) also saw significant share price decreases, with Fastly's drop occurring despite strong revenue growth and Planet Fitness facing a legal investigation.
• Betterware de México (NASDAQ: BETR) experienced a sharp decline after reporting a first-quarter loss of $1.86 per share, which was wider than analyst predictions.

The market saw significant downward movement in several stocks today. Leading the decline is TRDA (NASDAQ: TRDA), which fell 57.27% to close at $6.85. The biotechnology firm’s stock saw a massive trading volume of over 4.11 million shares. This selloff follows the release of clinical trial data for its Duchenne muscular dystrophy treatment.

In the technology sector, Fastly (NYSE: FSLY) fell 38.23% to $19.50. The drop occurred on an exceptionally high volume of over 46.74 million shares, despite Fastly reporting that its security revenues grew 47%.

In the consumer sector, Planet Fitness (NYSE: PLNT) saw its stock price decrease by 31.19% to $44.01, with trading volume hitting over 16.46 million shares. The decline happens as Johnson Fistel, PLLP, is investigating potential claims against the company’s executives to see if investor losses can be recovered under federal securities laws.

Finally, Betterware de México (NASDAQ: BETR) dropped 28.51% to $30.52 on a volume of over 2.76 million shares. The company reported a first-quarter loss of $1.86 per share. This loss was wider than what market analysts had predicted, which can often cause investors to sell their shares, even if other results are positive.

Today’s market losers highlight how specific company news drives stock performance. Key events like clinical trial results, legal investigations, and earnings reports that miss analyst estimates triggered major selloffs. The unusually high trading volumes for each company confirm that investors reacted strongly to these developments.