CVS, COR, among top S&P 500 healthcare gainers in Q1; WST and MRNA among losers

The healthcare sector, as measured by Health Care Select Sector SPDR Fund (NYSEARCA:XLV), with 12.12% weightage on the S&P 500, bagged a gain of 4.94% in Q1. Against a backdrop of overall market difficulties, it's notable that eight S&P sectors remain positive