 CorVel NASDAQ:CRVL was upgraded by equities researchers at BidaskClub from a buy rating to a strong-buy rating in a research note issued to investors on Friday, BidAskClub reports. Separately, TheStreet raised CorVel from a c rating to a b rating in a research report on Thursday, June 25th. NASDAQ CRVL opened at 84.69 on Friday. ... 