** Public transport operator's shares down 4 pctafter JP Morgan Cazenove downgraded stock to neutral and cutprice target ahead of co's interim results next week
** Brokerage cites risks to FY16 profit from co's GTR railfranchise and general weakness in industry
** Analysts say shortfall may not be offset by other partsof business
** "With the stock trading at a premium to the sector, webelieve investors may get a better entry point"
** Stock second biggest FTSE 250 loser and on trackfor worst day since October
** Stock under pressure after Chancellor George Osborneannounced a minimum wage rise hike in July 8 budget (abhiram.nandakumar.thomsonreuters.com@reuters.net)