03:22 PM EST, 11/13/2025 (MT Newswires) -- Health care stocks edged higher late Thursday afternoon, with the NYSE Health Care Index up 0.1% and the Health Care Select Sector SPDR Fund (XLV) adding 0.2%.

The iShares Biotechnology ETF (IBB) decreased 0.8%.

In corporate news, Day One Biopharmaceuticals (DAWN) has agreed to buy Mersana Therapeutics ( MRSN ) in a deal valued at up to about $285 million. Mersana shares surged 208%.