** HK shares of NIO 9866.HK fall 7.6% to HK$35.3; set for biggest one-day pct drop since April 7

** Stock top pct loser on Hang Seng Automobile Index .HSAMI and Hang Seng Tech Index .HSTECH

** U.S.-listed stock NIO.N lost 8.2% on Monday

** Electric car maker delivered 21,017 vehicles in July vs 24,925 in June

** YTD, HK stock gains 3.1%, U.S. shares rises 5.5%

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))