I got lucky. With my MPF, decided to buy at 18K and sell at 20K. Done a few rounds past few months including the most recent!
Pathophysiology of money
Why does the bloody thing have to pop up at the end of each month just in time for my DCA buy
Darn, that's good enough to play front running just 1 day ahead and sell to the funds.
The HSBC ones, especially, are backed by mutual funds distributed by HSBC. There's all sorts of things they can do if they really want and I think it would be hard to prove.