{
  "id": 16104346,
  "title": "Stock Market Today, Oct. 22: Moderna Stock Plummets 18% on Melanoma Vaccine Data Leak Reports",
  "url": "https://urgent.news/2026/10/22/stock-market-today-oct-22-moderna-stock-plummets-18-on-melanoma",
  "topic": "finance",
  "section": "Finance & Markets",
  "published": "2026-10-22T20:45:59.000Z",
  "source": {
    "name": "Motley Fool",
    "slug": "motley-fool",
    "url": "https://www.fool.com/coverage/stock-market-today/2026/10/22/stock-market-today-oct-22-moderna-stock-plummets-18-on-melanoma-vaccine-data-leak-reports/?source=iedfolrf0000001"
  },
  "original_language": "en",
  "account": "On October 22, Moderna's stock plummeted 18% following reports of a potential leak regarding its personalized melanoma vaccine data. The company's shares fell to $202.63 from $202.63. The leak reportedly indicated that Moderna's intismeran autogene, when combined with Merck's Keytruda, reduced the risk of recurrence or death in certain melanoma patients by 42% compared to Keytruda alone. This figure was lower than the 49% decline observed in Phase II trials. Trading volume surged to 49.3 million shares, about 148% above the three-month average of 19.9 million shares. While Moderna's stock has risen over sixfold in 2026, the leak has raised doubts among investors about the company's prospects.",
  "summary": "Personalized cancer vaccine material allegedly circulated online ahead of formal Phase 3 results, today, Oct. 22, 2026.",
  "key_points": [],
  "editors_take": null,
  "illustration": "https://urgent.news/ill/16104346.png",
  "coverage": {
    "outlets": 3,
    "also_reported_by": [
      {
        "outlet": "Bloomberg",
        "title": "Moderna, Merck Fall After Melanoma Data Leak",
        "url": "https://urgent.news/2026/10/22/moderna-merck-fall-after-melanoma-data-leak",
        "published": "2026-10-22T20:28:59.000Z"
      },
      {
        "outlet": "Nasdaq Markets",
        "title": "Stock Market Today, Oct. 22: Moderna Stock Plummets 18% on Melanoma Vaccine Data Leak Reports",
        "url": "https://urgent.news/2026/10/22/stock-market-today-oct-22-moderna-stock-plummets-18-on-melanoma-16112694",
        "published": "2026-10-22T21:05:59.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}