SGX Rulebooks
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A Trading Member or Trading Representative should not make large entries above or below the prevailing spread to facilitate filling an order on the other side of the market. The placing of buy (or sell) orders at various price steps below (or above) the market may create a false or misleading appearance that the entries are on behalf of genuine buyers (or sellers). The layering of orders also translates into a change in the depth screen and may mislead market participants with respect to interest in the counter.

Added on 3 June 20193 June 2019.