** Shares of JBM Auto JBMA.NS surge 10.2% to 636.70 rupees, top gainer among small-cap stocks .NIFSMCP100
** Nearly 212,000 shares of electric bus maker change hands over two block deals, both at a premium to Tuesday's closing price of 577.95 rupees
** Overall, 14.8 million JBMA shares traded, 48x the 30-day average volume
** Including day's gains, stock's YTD losses narrow to 17%, but trails e-bus rival Olectra Greentech's OLEC.NS ~14% decline
(Reporting by Nandan Mandayam in Bengaluru)
((Nandan.Mandayam@thomsonreuters.com; Mobile: +91 9591011727;))