** Shares of Sihuan Pharmaceutical Holdings Group Ltd rise 8% to HK$2.15, their biggest daily percentage gain since Aug 31
** Stock on track to snap eight straight sessions of losses
** The Beijing-based co says it has repurchased 3.3 mln shares, or 0.03% of the issued share capital, in the open market on Sept 16 for HK$6.52 mln ($837,895) as a vote of confidence in its long-term business prospect
** Says its financial position is solid and healthy, and it may make further share repurchase depending on market conditions
** Hong Kong's healthcare index jumps 4.4% and the Hang Seng Composite Index climbs 0.7%
** The Hang Seng China Enterprises Index rises 1.1% and the benchmark index gains 0.6%
** Stock up 142.7% this year, as of last close