Queries on penny stocks: should SGX be more selective?

GIVEN that penny stock punting now forms the bulk of daily activity and that the low absolute prices of these counters mean that large percentage movements will be commonplace, should the Singapore Exchange (SGX) maybe exercise greater discretion in its queries and issuing of "Trade With Caution" (TWC) notices?

It's a question which some retail brokers have been asking and it's certainly valid since too many queries and TWCs would lessen their effectiveness.

Also of concern is tha…