Index  ›  finance  ›  Forbes
finance · Forbes ↗

Why Is Moderna Stock Down Today?

Forbes Published Aug 20, 2026 Reviewed Aug 20, 2026 ✓ Reviewed by citations.press editors
Why Is Moderna Stock Down Today?
Moderna’s market valuation fell by more than $18 billion on Thursday.
more than 18 billion · Moderna
Moderna shares plunged more than 25 percent to around $129 on Thursday afternoon.
more than 25 · Moderna shares129 $ · Moderna shares
Moderna shares surged 176 percent on Wednesday, more than doubling the stock’s value to above $174.
176 · Moderna sharesmore than 174 $ · Moderna shares
Bank of America analyst Alec Stranahan raised his share price target for Moderna to $170 from $40.
170 $ · Alec Stranahan's share price target for Moderna40 $ · Alec Stranahan's original share price target for Moderna Alec Stranahan, Bank of America analyst
Moderna’s market valuation was $51.5 billion on Thursday, down more than $18 billion from Wednesday’s $69.6 billion.
51.5 billion · Modernamore than 18 billion · Moderna
Thomas Langer’s stake in Moderna increased from $730 million to about $1.7 billion on Wednesday.
730 million · Thomas Langer's stake in Moderna1700 million · Thomas Langer's stake in Moderna
Noubar Afeyan’s net worth rose by $184 million to $2.2 billion on Wednesday.
184 million · Noubar Afeyan's net worth increase2200 million · Noubar Afeyan's net worth
Stéphane Bancel’s fortune increased by $2.5 billion to $5.8 billion on Wednesday.
2500 million · Stéphane Bancel's fortune increase5800 million · Stéphane Bancel's fortune
Noubar Afeyan’s net worth fell by $105 million to $2.1 billion on Thursday, while Stéphane Bancel’s fortune fell by $1.3 billion to $4.4 billion.
105 million · Noubar Afeyan's net worth decrease2100 million · Noubar Afeyan's net worth1300 million · Stéphane Bancel's fortune decrease4400 million · Stéphane Bancel's fortune
Moderna posted a net loss of $782 million on revenue of $145 million in its latest quarter.
782 million · Moderna net loss145 million · Moderna revenue

Moderna’s stock retreated on Thursday following a record-setting jump a day earlier, cutting more than $18 billion from the company’s market valuation, as investors appeared to pull back after the biotech giant reported breakthrough trial results for a cancer vaccine.

Shares of Moderna plunged more than 25% to around $129 as of early Thursday afternoon, a retreat from the firm’s record-setting 176% surge Wednesday that more than doubled the stock’s value, to above $174.

Skyrocketing shares followed Moderna's announcement that its personalized cancer drug—an mRNA-based shot combined with Merck’s immunotherapy drug Keytruda—helped reduce the recurrence of melanoma and significantly extended the time patients lived without their melanoma returning.

A decline appears to represent investors taking profits from the stock surge, and Wall Street still applauded Moderna’s trial results: Bank of America analyst Alec Stranahan, who more than quadrupled his share price target for Moderna to $170 from $40, called the results a “watershed moment” for the firm, allowing it to further diversify from infectious disease.

Stranahan noted we “still don’t know how much better” Moderna’s combined drug is than Keytruda alone, and that more testing would likely be necessary.

$51.5 billion. That’s Moderna’s market valuation as of Thursday, marking a more than $18 billion decline from Wednesday’s closing valuation of $69.6 billion.

Moderna’s record-setting stock surge made co-founder Thomas Langer a billionaire once again, raising his roughly 3% stake in the firm from $730 million on Tuesday to about $1.7 billion on Wednesday. Fellow co-founder Noubar Afeyan’s net worth jumped $184 million to $2.2 billion, and CEO Stéphane Bancel’s fortune rose $2.5 billion to $5.8 billion. Afeyan’s net worth fell $105 million to $2.1 billion on Thursday, and Bancel’s fell by $1.3 billion to $ 4.4 billion.

Leerink Partners analyst Mani Foroohar wrote in June that Moderna’s late-stage cancer vaccine trial would be a make-or-break event for its stock, with the potential for the experimental drug to work across multiple types of cancer. Merck and Moderna have said they are looking into several trials of the vaccine for other cancers, including non-smallcell lung cancer and bladder cancer. Moderna’s business boomed from the success of its mRNA-based COVID-19 vaccine, though it posted a net loss of $782 million on revenue of $145 million through its latest quarter.

This article was originally published by Forbes ↗. citations.press indexes the source-backed facts above and links to the original. Something wrong? Corrections policy · Report an error