Moderna falls 17.6% despite positive data from its cancer vaccine

FinanceInternationalXTB.comOct 23, 2026, 10:28 AM40 s readAI summary

Moderna shares fell 17.6% to US$202.63 after phase 3 data for intismeran autogene, its personalized cancer vaccine developed with Merck, leaked early. The trial, with 1,137 high-risk melanoma patients, showed a 42% reduction in the risk of recurrence or death when combined with Keytruda, versus 49% in phase 2b. The market had expected a more convincing confirmation. The stock is up 587.1% in 2026.

In 40 seconds

Moderna lost 17.6% and closed at US$202.63 after the leak of phase 3 data for its cancer vaccine.
The combination with Keytruda reduced the risk of recurrence or death by 42% and the risk of distant metastasis or death by 38% in 1,137 high-risk melanoma patients.
Phase 2b had shown reductions of 49% and 59%, benchmarks the market used for comparison despite differences between the studies.

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IASummary generated by artificial intelligence from a story by XTB.com. It may contain errors: the original source prevails.

Moderna
Merck
farmacéuticas
bolsa
oncología

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Moderna falls 17.6% despite positive data from its cancer vaccine

In 40 seconds

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Keep reading

IMF backs economic rescue bill as Banco de la República calls for rigor in its review

Parks and attractions in Colombia generated US$1.095 billion in 2024, according to IAAPA

President requests urgent congressional passage of fiscal adjustment bill

Oil edges lower after U.S. bombs Iran ahead of Election Day