A link and comments on the website of David Webb:
"They reportedly also propose widening the bid-offer spread, which is a sure-fire way to reduce liquidity, not increase it. This is another sign of desparation after the proposal to list second-class shares. Who is running SGX these days? What next - introducing minimum commissions? Rather than fiddle with trading hours and rules, consider allowing competing exchanges, then let the market discover which hours and spreads it wants."
A previous article by Webb on bid-offer spreads can be found here: HKEx keeps wide spreads