During post-trading, what happens to non-executed orders whose validity ends on the current trading day?

• A. The exchange deletes all non-executed orders whose validity ends on the current trading day; new orders/withdrawals allowed.
• B. The exchange keeps non-executed orders for the next day.
• C. All such orders are canceled with no reentry.
• D. The exchange recalculates tomorrow TOP.

Answer: (A)

The key idea is that orders with day-only validity do not carry over to the next trading day. If an order isn’t executed and its validity ends today, the system automatically cancels it at the close of the session. This ensures nothing remains active beyond the intended trading day, and you’re free to place new orders or withdraw as the market reopens. If you want the order to stay active, you’d need a longer validity option (like next-day or good-till-cancelled).