Updates
** Shares of used-car retailer CarMax KMX.N slump 14% to $35 in early trading
** Board member David McCreight named interim CEO and president
** McCreight is set to replace current CEO Bill Nash, effective December 1
** Co expects Q3 net earnings per share of 18 cents to 36 cents, well below estimates of 70 cents, according to data compiled by LSEG
** Also expects Q3 comparable store sales decrease of 8% to 12%
** J.P. Morgan cuts KMX rating to "underweight" from "neutral", slashes PT to $30 from $50, showing a 26.5% downside from the stock's last close
** Including session moves, shares down 57% YTD
(Reporting by Apratim Sarkar in Bengaluru)
((Apratim.Sarkar@thomsonreuters.com))