** Zip Co shares ZIP.AX surge 15% to A$2.68, their highest level since Feb 26
** Set for strongest intraday pct gain since April 16, if gains hold
** BNPL firm raises FY25 guidance for cash EBITDA to at least A$160 million; earlier forecast A$153 million
** Forecast upgrade on continued strong performance, particularly in U.S. - Zip
** Trading volume at more than 1.9 mln shares vs 30-day avg volume of 1.5 mln shares
** YTD, stock down 9.5%, including current session's moves
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))