09:04 AM EDT, 08/10/2026 (MT Newswires) -- Healthcare stocks were mixed premarket Monday, with the State Street Health Care Select Sector SPDR ETF (XLV) down 0.1% and the iShares Biotechnology ETF (IBB) 0.3% higher.

Sionna Therapeutics ( SION ) shares were down 90% after the company said it will not advance SION-719 as an add-on therapy to standard of care Trikafta in cystic fibrosis patients after a phase 2a proof-of-concept failed to meet its key activity endpoint of sweat chloride reduction.