** Shares of Tencent 0700.HK climb 3.7% to HK$479.6, set for their biggest one-day pct gain since April 8
** Stock hits highest point since May 7, up for a second straight session
** Sixth-biggest pct gainer in the Hang Seng TECH Index .HSTECH, which is up 1.3%
** Tencent reported first-quarter revenue and net profit below expectations on Wednesday as the Chinese tech giant ramps up investment in artificial intelligence in an increasingly crowded market
** Citi maintains "buy", saying it remains confident that Tencent's AI initiative will gradually come into fruition along with sustainable core profit growth
** Jefferies keeps "buy", saying it expects advertising to gain market share and resilient game performance is expected from evergreen titles
** Morningstar says Tencent's AI investments are already delivering return, evidenced by an upgraded AI-driven ad recommendation model driving acceleration in advertising revenue growth to 20%
** YTD, stock down 21.3%, while the benchmark Hang Seng Index .HSI up 3.9%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))