Ann: Market Update, page-36

The market then trades as usual until 4:00pm, at which point the market enters what is known as ‘Pre-CSPA’ (Closing Single Price Auction). Between 4:00pm – 4:10pm, orders can be entered into the market, existing orders can be amended etc, and we have a similar situation to that of the Pre-Open phase. It’s handy to know of this period, as some investors I’ve spoken to just after 4pm, who are very keen to either buy or offload some shares that day, think it’s too late for them. And yet, they can still buy or sell if they get in by 4:10pm.