After two months of relative stability, new data from CarMax KMX Auto Finance (CAF) shows a renewed uptick in loan delinquencies and net losses, raising concerns about credit quality across the used auto lender's portfolio.Wedbush analyst Scott Devitt reiterated CarMax with an Outperform and $90 price target on Wednesday.On Monday, CAF reported securitization trust data for May, Devitt noted.The analyst noted that after two relatively encouraging months, the data resumed weaker trends that were observed ear ...