** Shares of Shandong Boan Biotechnology 6955.HK fall 6.6% to HK$11.3, on course for biggest one-day pct drop since May 7
** Stock is the second biggest pct loser on healthcare index .HSCIH, which is up 3.1%
** The Chinese therapeutic antibodies producer plans sale of 38.4 mln new shares, or 6.69% of enlarged share capital, in a share placement, raising HK$400 mln ($51 mln) for R&D and commercialization of products
** The shares will be issued at HK$10.42 apiece, or 13.9% discount to Tuesday's close of HK$12.10 each
** Hang Seng Biotech Index .HSHKBIO rises 3.4%, Hang Seng Index .HSI adds 0.7%
** YTD, stock up 29.7%
($1 = 7.8462 Hong Kong dollars)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))