** Hong Kong shares of Li Auto Inc 2015.HK rise 5.5% to HK$71.35, on course for their biggest one-day pct gain since July 17, 2025, if gains hold
** Stock hits highest since March 17 on the second session of gains; top pct gainer in Hang Seng TECH Index .HSTECH, which climbs 1.7%
** U.S.-listed stock LI.O rose 3.6% on Tuesday
** Chinese electric vehicle maker says its board has approved a share repurchase program, authorising the company to repurchase up to $1 bln worth of A shares or American depositary shares for a period of up to end-March, 2027, to reflect confidence in its strategic roadmap and future value creation
** YTD, Hong Kong stock up 9.2%, U.S.-listed shares up 4.8%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))