** Dmall 2586.HK drops 6.6% to HK$11.52; set for biggest one-day pct fall since April 17

** Retail digitalisation solutions provider plans sale of 35.4 mln new shares to key shareholder Odor Nice in a top-up placement to raise HK$389 mln ($49.6 mln)

** Fund will be used for R&D investment in stablecoins and blockchain, technology advancement

** New shares will be issued at HK$11.1, representing 10% discount to Wednesday's close

** YTD, stock up 83.7%

($1 = HK$7.8498)

(Reporting by Donny Kwok)

((donny.kwok@thomsonreuters.com))