09:02 AM EDT, 03/16/2026 (MT Newswires) -- Health care stocks were flat to higher premarket Monday, with the iShares Biotechnology ETF (IBB) inactive and the State Street Health Care Select Sector SPDR ETF (XLV) up 0.5%.

CytomX Therapeutics ( CTMX ) shares were up more than 50% after the company said a phase 1 clinical trial evaluating varsetatug masetecan in patients with advanced colorectal cancer yielded confirmed response rates of up to 32%.