** CARsgen Therapeutics Holdings 2171.HK jumps 13.7% to HK$18.88, highest since February 27
** Stock set for biggest one-day pct rise since April 22
** Chinese cell therapies developer to repurchase shares representing up to 1% of the total issued shares in the open market within 150 Hong Kong trading days from May 8
** Co says repurchase will be funded through non-IPO raised funds, including business development income, interest income and other subsidy
** YTD, stock up 104.1%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))