02:06 PM EDT, 10/10/2024 (MT Newswires) -- Health care stocks were lower Thursday afternoon, with the NYSE Health Care Index and the Health Care Select Sector SPDR Fund (XLV) each shedding about 0.4%.

The iShares Biotechnology ETF (IBB) was down 0.3%.

In corporate news, 10x Genomics ( TXG ) shares tumbled about 24% after the company overnight said preliminary results showed a revenue decline of about 1% year-on-year to roughly $151.7 million for Q3. Analysts polled by Capital IQ expected $162.3 million.

Pfizer ( PFE ) shares dropped 2.6% after shareholder Starboard Value said in a letter Thursday it was urging the company's board to immediately form a special committee to probe an event that resulted in former Chief Executive Ian Read and former Chief Financial Officer Frank D'Amelio facing threats from "people within Pfizer ( PFE ) and/or their representatives."

US Senator Elizabeth Warren has asked the US Federal Trade Commission to "carefully scrutinize" the $16.5 billion bid by Novo Nordisk's ( NVO ) parent company for contract drug maker Catalent ( CTLT ) and to block the deal if it's found to be in breach of antitrust rules. Novo shares were rising 0.6%, while Catalent ( CTLT ) was down 0.7%.