** Shares of New Zealand's Gentrack GTK.NZ fall as much as 34% to NZ$3.98, on track for their worst trading session on record
** Stock touches its lowest level since May 19, 2023
** The billing software maker expects FY26 operating earnings between NZ$13.5 million and NZ$20 million ($7.92 million and $11.73 million), down from NZ$27.8 million in FY25
** However, the company announces an on-market share buyback of up to NZ$20 million, not exceeding 5% of shares, following the release of its H1 results
** Stock down 53% YTD
($1 = 1.7047 New Zealand dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))