** Shares of Gold Hydrogen GHY.AX rise as much as 52% to
A$1.100, their highest since IPO debut
** The natural hydrogen gas developer completes
institutional placement raising A$14.8 mln ($9.70 million)
** Co adds placement was conducted at an issue price of
A$0.75 per share, a 5.1% discount to stock's last closing price
** Co says funds will be used to develop co's Ramsay project
** Co receives A$25 mln cash plus R&D tax refunds
** Stock set to post the biggest intraday pct gain since Nov
1
** About 1.5 mln shares change hands, compared with the
30-day average volume of 830,147
($1 = 1.5256 Australian dollars)
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))