** OFX Group plunges 47.4% to A$1.2; set for their biggest ever intraday pct drop

** Stock at it lowest level since May 5, 2021

** International payments services provider expects to deliver underlying EBITDA of A$29 mln ($19.4 mln) for H1 FY25 vs A$31.8 mln a year ago

** Sees HY net operating income (NOI) of A$111 mln, slightly lower than year-ago A$111.5 mln

** Says expectation of lower NOI in HY will result in lower NOI growth for FY25, below the 10% indicated in its FY24 results

** About 9.3 mln shares traded in stock's busiest day since May 22

** YTD, stock largely flat

($1 = A$1.4941)

(Reporting by Ayushman Ojha in Bengaluru)

((Ayushman.ojha@thomsonreuters.com;))