** HK shares of Alibaba 9988.HK fall 6.4% to HK$123.5, lowest level since August 29
** Stock set for biggest one-day pct decline since April 7, 2025; second biggest pct loser on Hang Seng Index .HIS, Hang Seng TECH Index .HSTECH, which are down 0.4% and 1.2%, respectively
** U.S-listed stock BABA.N fell 7.1% on Thursday
** China's largest e-commerce group reports 1.7% rise in Q3 revenue, but net income drops 66.3%; both below analysts' estimate, as heavy spending on one-hour delivery, promotions during peak shopping periods failed to spur demand
** Jefferies ("buy") says total revenue growth lags consensus
** Trims PT on HK stock to HK$206 from HK$218, and on U.S. stock to $212 from $225
** YTD, HK stock down 12.1%, U.S. shares down 14.8%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))