** Yadea Group Holdings stock 1585.HK jumps 8.4% to HK$13.2, on course for its biggest one-day pct gain since March 18

** Stock hit the highest level since May 23, on track for third consecutive session of gains

** Top pct gainer on Hang Seng Automobile Index .HSAMI, which is down 1.3%

** Chinese electric two-wheeler manufacturer expects net profit of at least 1.60 bln yuan ($222.63 mln) for six months ending in June vs 1.03 bln yuan profit the same period a year ago

** Around 19.5 mln shares worth HK$246.2 mln changed hands

** Hang Seng Tech Index .HSTECH falls 1.7%

** YTD, stock down 2.9%

($1 = 7.1868 Chinese yuan renminbi)

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))