UPDATE 3-Niche RINS prices jump to 2013 highs as supply jitters return

NEW YORK, June 29 (Reuters) - U.S. biofuels credits hit near three-year highs on Wednesday after Goldman Sachs Group warned supplies could more than halve by the end of 2017, in what could mark the return of prolonged wild prices in the niche market for the first time in years.