** Shares of payments fintech firm Cornerstone CSFS.L
surges as much as 26.8% to 14.9p
** Stock hits its highest since July 11, 2022
** Co says on track for FY23 performance to be significantly
ahead of expectations, including achieving its first full year
of positive adjusted core profit
** CSFS posts profit before tax for the six months ended
June 30 vs year-ago loss; revenue surges 90%
** Stock currently up 17%, taking YTD gains to around 129%
($1 = 0.8016 pounds)
(Reporting by Aby Jose Koilparambil in Bengaluru)
((abyjose.koilparambil@thomsonreuters.com))