** Shares of JSW Energy JSWE.NS up 2% at 547.95 rupees
** Power generator opens issue of shares via QIP on May 20; sets floor price at 534.05 rupees per share
** Co expects to raise up to 40 billion rupees ($415.06 million), says CNBC-TV18, citing sources
** Co did not immediately respond to Reuters' request for a comment
** Stock rated as "Buy" on average by 17 analysts; median PT at 624 rupees - LSEG-compiled data
** YTD, stock up 13.6%
($1 = 96.3725 Indian rupees)
(Reporting by Mridula Kumar in Bengaluru)
((Mridula.Kumar@thomsonreuters.com;))