Why Viking Therapeutics Stock Popped, but Novo Nordisk and Hims & Hers Health Dropped Today

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A shake-up may be brewing in the market for GLP-1 diet drugs Friday, and it's making itself felt all across the field of companies selling (or hoping to sell) semaglutide and related drugs for treating diabetes and losing weight. As of 11 a.m. ET, shares of Novo Nordisk (NYSE: NVO) are down 4.2%, and Hims & Hers Health (NYSE: HIMS) stock is getting walloped for a 5.8% loss. In contrast, shares of Viking Therapeutics (NASDAQ: VKTX) are up a modest 3.3%.

And why? As CNBC reports today, the Biden administration is using its last few days in office to add 15 prescription drugs to the list of medications on which Medicare can negotiate prices. And here's the kicker: Three weight loss drugs from Novo Nordisk top this list.

Why Novo Nordisk investors are nervous today

Taking aim at the sky-high price of semaglutide, Medicare plans to negotiate prices for Novo Nordisk products Ozempic (an injection to control diabetes), Wegovy (an injection more designed for weight loss), and Rybelsus (a pill for diabetes). CNBC notes that prices for these drugs have been impacted by a combination of high demand and low supply, as well as varied coverage by private insurance. Once negotiated, the prices reimbursed by Medicare would go into effect in 2027.

Commenting on the move, Stephen Ubl's PhRMA pharmaceutical industry lobbying group called price negotiations "dangerous for millions of Americans who rely on innovative treatments." But what investors are more worried about is whether these negotiations will be dangerous for corporate profits.

Some 2.3 million Medicare enrollees use Ozempic, Wegovy, and Rybelsus combined, and Medicare spent $14.3 billion buying them between November 2023 and October 2024, according to the Centers for Medicare and Medicaid Services. That's a big pile of profits for Novo that are now being put at risk.

Novo may not like it, but as CNBC notes, the company will be required to choose between negotiating its prices lower, paying an excise tax of 95% of its sales on the drugs, or not having the drugs covered by Medicare and Medicaid at all.

GLP-1 injection in a syringe.
Image source: Getty Images.

What this means for Hims & Hers and Viking Therapeutics

It's less obvious why this is making Him & Hers investors nervous today, or, for that matter, why Viking Therapeutics stock is going up. None of their drugs seem to be implicated in the Medicare price negotiations, after all. In addition to Ozempic, Wegovy, and Rybelsus, 14 other drugs are named as subject to negotiation, but there's nothing from Hims & Hers or Viking on the list.