03:43 PM EST, 02/04/2025 (MT Newswires) -- Health care stocks fell late Tuesday afternoon with the NYSE Health Care Index down 0.4% and the Health Care Select Sector SPDR Fund (XLV) shedding 0.3%.

The iShares Biotechnology ETF (IBB) rose 0.5%.

In corporate news, Quantum BioPharma ( QNTM ) shares more than doubled. The company said a trial of its dietary supplement Unbuzzd confirmed it accelerates alcohol metabolism, speeds the reduction of blood alcohol concentration and reduces symptoms of intoxication, impairment and hangover.

Turnstone Biologics ( TSBX ) decided to discontinue all clinical trials assessing Tidal-01 in solid tumors and launched a process to explore alternatives to maximize shareholder value. The stock jumped 10%.

Merck ( MRK ) issued a downbeat full-year outlook, overshadowing stronger-than-expected Q4 results. The shares fell 9.2%.

Pfizer's ( PFE ) Q4 results topped market expectations amid double-digit revenue growth across key segments, while the pharmaceutical giant reiterated its full-year outlook. The shares dropped 1.2%.