** Shares of slimming and beauty services provider Perfect Medical Health Management Ltd jump 7.3% to HK$6.20, their biggest daily percentage gain since Sept 3
** Stock on course to snap four consecutive session of losses
** Co says it bought back 1 mln shares in the open market for HK$5.7 mln ($732,525) on Sept 16
** Says Chairman Au-Yeung Kong has also bought 1 mln shares in the open market for HK$5.8 mln on Sept 16, raising his stake in the company to 72.23% from 72.15%
** Co says chairman may consider increasing his stake further in the company when appropriate
** The Hong Kong Hang Seng Commerce & Industry Index surges 2.3%, and the healthcare index jumps 4.5%
** The Hang Seng China Enterprises Index rises 1.2% and the benchmark index gains 0.7%
** As of last close, stock up 83% this year