08:58 AM EDT, 05/31/2024 (MT Newswires) -- Health care stocks were flat to higher pre-bell Friday, with the iShares Biotechnology ETF (IBB) was inactive and the Health Care Select Sector SPDR Fund (XLV) up 0.4% recently.

Summit Therapeutics ( SMMT ) fell more than 25%, cutting into its more than 137% surge Thursday after it said ivonescimab met the primary endpoint of progression-free survival to treat a type of lung cancer, beating Merck's ( MRK ) pembrolizumab.