Pre-Open Market is the period where the trading activities take place just before the commencement of the regular stock market session. The pre-open market sessions are scheduled between 9:00 AM and 9:08 AM on the trading days for both the National Stock Exchange (NSE) and Bombay Stock Exchange (BSE).
Points to be remembered:
During the pre-open market, clients can place orders in the Equity segment only.
F&O orders placed such as Equity F&O, Commodity F&O, and Currency F&O will be rejected stating the markets are offline.
BO/CO/Schedule orders are disabled during the pre-open market. However, clients are allowed to place regular intraday and delivery orders.
Placing an order in the pre-open market is as simple as placing a regular order. All you need to do is place the intraday/delivery order in the equity segment between 9:00 AM and 9:08 AM. For more details on order placement, refer to this article section.
Note:
The orders that are placed between 9:00 AM and 9:08 AM, will not necessarily be executed.
If the order is not executed during the above-mentioned time, it will automatically be under 'Open Orders' and will be executed (based on available price) during the market hours i.e., 9:15 AM to 3:30 PM.
For information on the Post Market, refer to this article.