(a) A fund manager's quarterly performance will improve if the valuation of his portfolio at the end of the quarter in question is higher. By placing a large order to buy relatively illiquid securities and/or futures contracts, which are also components of his portfolio, to be executed in or just before the Closing Routine, his purpose might be to distort the price in his favour.
(b) The expiry of futures contracts may require a timed unwinding of the countervailing security position. In these circumstances, price impact in some securities may be inevitable, particularly in less liquid securities. However, a Trading Member or Trading Representative should be alert to a customer seeking to cause unnecessary price impact to improperly generate a profit or move the index.

Added on 3 June 20193 June 2019 and 3 June 20193 June 2019.