** Shares of investment manager Powerhouse Ventures closed 15% higher at A$0.09, their highest since mid-April 2022
** Stock posted its biggest pct daily gain since Sept. 2
** Stock gains for third straight session
** PVL says carbon project developer Revaia, which it holds a stake in, will merge with RegenCo Group
** Says after merger, PVL's stake will be valued at A$3 mln($1.87 mln), up from initial investment of A$750,000 ($466,650)
** Over 738,000 shares have been traded, 4.1x of 30-day moving avg
** Stock up 77.78% so far this year
($1 = 1.6072 Australian dollars)
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com;))