01:57 PM EDT, 05/11/2026 (MT Newswires) -- Healthcare stocks were mixed Monday afternoon with the NYSE Healthcare Index rising 0.2% and the State Street Healthcare Select Sector SPDR ETF (XLV) little changed, paring earlier losses.

The iShares Biotechnology ETF (IBB) increased 0.3%.

In corporate news, Moderna ( MRNA ) has been working on early-stage vaccines targeting hantaviruses, Bloomberg reported Friday, citing a company statement. The research began before recent infections were reported aboard the Dutch-flagged Hondius, the report said. Moderna ( MRNA ) shares fell 2.2%.

Sonida Senior Living ( SNDA ) shares fell 3.6% after the company reported Q1 loss of $2.39 per diluted share, widening from the loss of $0.77 a year earlier. Three analysts polled by FactSet expected a loss of $1.53.

Erasca ( ERAS ) entered a clinical trial collaboration and supply agreement with Merck ( MRK ) to study its investigational drug ERAS-0015 in combination with Keytruda in patients with RAS-mutant solid tumors. Erasca ( ERAS ) shares rose 3.3%, and Merck ( MRK ) added 1.2%.