** Shares of software provider Vobile Group Ltd rise as much as 10.6% to HK$31.85, on course for their best session since April 22
** Stock of medical service provider EC Healthcare
, formerly Union Medical Healthcare Ltd, rise as much as 6.4% to HK$11, on track for the best day since May 6
** Both firms say they will be included in the MSCI Hong Kong small-cap index from the close of market hours on May 27
** The Hong Kong Hang Seng Commerce & Industry Index rises 1.4%
** The Hong Kong Hang Seng sub-index, tracking information technology firms , surges 3.1%
** The Hang Seng China enterprises index climbs 0.9%, and the benchmark index gains 0.2%