Yes. You can change your investment portfolio anytime unlimitedly without any fund-switching fee via member website, mobile app or by submitting the Form [FS (MEM)-MT](For BCT (MPF) Pro Choice) or [FS (MEM)-IS](For BCT (MPF) Industry Choice) by fax or by post.
There is no bid-offer spread in the switching process. Funds are traded on a “forward pricing” mechanism, i.e. your subscription units / redemption amount will be calculated based on the net asset value of the fund when the market closes on the day (or the next trading day if the instruction was placed after the dealing cut-off time of that day) after you place your instruction. As such, it is impossible for trustees or scheme members to know the exact trading price of a fund at the time the instruction is placed.