08:55 AM EDT, 10/23/2024 (MT Newswires) -- Health care stocks were steady premarket Wednesday, with the iShares Biotechnology ETF (IBB) inactive and The Health Care Select Sector SPDR Fund (XLV) up 0.1%.

Alto Neuroscience ( ANRO ) shares were down more than 62% after the company overnight said a phase 2b study of ALTO-100 in patients with major depressive disorder failed to meet its primary endpoint compared with placebo.