** Nasdaq-listed shares of video game maker GRVY.O up
~13.5% at $52.80 in afternoon trade
** South Korea-based firm posts Q1 online game revenue of
$17.7 mln, up 10.2% from a year ago urn:newsml:reuters.com:*:nGNX4YJsHX
** GRVY's message volumes surge 500% on retail
investor-focused forum Stocktwits
** Operating profit in Q1 rose 138.2% to $18.42 mln over the
prior quarter
** Co said it benefited from its game Ragnarok Online doing
well in Taiwan, the Philippines, Singapore and Malaysia
** Including session gains, shares down ~22.5% YTD
(Reporting by Manya Saini in Bengaluru)
((Manya.Saini@thomsonreuters.com;))