JPMorgan downgrades CarMax, saying 'sticker shock' will continue to hurt sales

An employee places a pending sale sticker on a used Pontiac GTO vehicle outside of a CarMax Inc. dealership in Burbank, California, U.S., on Tuesday, June 17, 2014.
Patrick T. Fallon | Bloomberg | Getty Images

Vehicle prices are getting out of hand for some consumers, and that could hurt CarMax in the near term, according to JPMorgan.