Moderna (NASDAQ:MRNA | MRNA Price Prediction) shares have crashed 20% as of 12:00 PM ET on Thursday after delivering one of the biotech sector’s most extraordinary single-day moves of 2026. CNBC co-anchor Andrew Ross Sorkin told viewers that Moderna’s Phase 3 results for its experimental cancer vaccine sent the stock soaring 177% on Wednesday,

Moderna Inc. MRNA stock is trading lower after it rallied around 170% on Wednesday on upbeat data from individualized cancer therapy for advanced skin cancer. At a pre-planned interim analysis, Merck & Co Inc.

A personalized mRNA therapy met two melanoma trial goals, the FDA cleared the first treatment for GSDIa, and Novo tests lower doses of its obesity pill.

Merck (NYSE: MRK), known as MSD outside of the United States and Canada, and Moderna, Inc. (NASDAQ: MRNA) today announced positive topline results from the Phase 3 INTerpath-001 trial evaluating adjuvant treatment with intismeran autogene (intismeran;

Moderna shares more than doubled after announcing initial results from a study of an experimental cancer treatment.

Moderna MRNA stock fell 20%% to $138, compared with Wednesday’s close of $174.38. The decline followed a more than doubling of the shares on August 19 after Moderna and Merck announced positive results from the Phase 3 INTerpath-001 study of their personalized mRNA cancer vaccine, intismeran autogene.

Today, Aug. 19, 2026, Moderna's personalized cancer vaccine met its late-stage goal, with the company and Merck planning an FDA submission.