08:56 AM EDT, 03/11/2025 (MT Newswires) -- Health care stocks were flat to higher premarket Tuesday with the iShares Biotechnology ETF (IBB) unchanged and the Health Care Select Sector SPDR Fund (XLV) recently up 0.3%.

Arvinas ( ARVN ) and Pfizer ( PFE ) said a phase 3 clinical trial of vepdegestrant monotherapy as an investigational treatment for advanced or metastatic breast cancer met its primary endpoint in the estrogen receptor 1-mutant population, but did not reach statistical significance in progression-free survival improvement in the intent-to-treat population. Arvinas ( ARVN ) shares tumbled by over 36% pre-bell.