By Kevin Lim and Adrian Bathgate

SINGAPORE/WELLINGTON, Aug 17 (Reuters) – “Dark pools” and other alternative trading systems are not as big a threat to Asia’s bourses as they are for their western counterparts, given regulators’ reluctance to grant them a free reign and due to structural differences in markets.

Dark pools, so named because they represent large pools of “buy” and “sell” orders not visible to regular investors, operate relatively freely and match billions of dollars in stock transactions each day in the west.