Moderna Stock Plunges 25%—Wiping Out $18 Billion After Historic Cancer Vaccine Breakthrough
Moderna and Merck announced positive results from a cancer vaccine trial, causing the company's stock to more than double. However, investors later sold off their shares, erasing some of those gains and reducing the company's value by billions of dollars.
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National story. 7 articles from 7 sources. Updated Aug 21, 2026.
How each side is putting it
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2 sourcesFrom COVID to cancer: How Moderna’s stock jumped 177% in a day
Center
2 sourcesRight
3 sourcesRan by 2 outlets· Independent Journal Review, BizPac Review
The story so far
2 developments- Aug 19Only right-leaning coverage:Pharma stock skyrockets over 100%
- Aug 20Moderna Stock Plunges 25%—Wiping Out $18 Billion After Historic Cancer Vaccine Breakthrough
Who covered each development
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Center
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No new developments
Quiet for 58 daysLast development · Aug 20 — Moderna Stock Plunges 25%—Wiping Out $18 Billion After Historic Cancer Vaccine Breakthrough
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