#6-21E. Betting on Medicine: The Risks and Realities of Clinical Trial Prediction Markets (NEJM, 2026)

As commercial prediction markets begin allowing public wagers on clinical trial endpoints, a fundamental question emerges regarding how speculative betting might impact medical research integrity. While these platforms aggregate expert consensus to forecast trial success, real-time market probabilities risk undermining equipoise, altering participant adherence, and incentivizing trial manipulation. Although this Perspective paper lacks empirical trial outcome data, it highlights a critical paradigm shift for clinicians. Physicians must prepare to guide patients who may confuse volatile market odds with personal treatment outcomes, reinforcing transparent communication when discussing novel therapies.

Citation: Vogel M, Yaeger R, Wouters OJ. Clinical Trial Prediction Markets — Information, at What Cost? N Engl J Med. 2026. DOI: 10.1056/NEJMp2610547

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