# NSE/BSE Pre-Open Session – Revised Timings Effective September 7, 2026

**URL:** <https://community.aliceblueonline.com/t/nse-bse-pre-open-session-revised-timings-effective-september-7-2026/14512>\
**Category:** Announcements\
**Created:** [September 4, 2026, 1:43pm UTC](https://community.aliceblueonline.com/t/nse-bse-pre-open-session-revised-timings-effective-september-7-2026/14512 "2026-09-04T13:43:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![community\_admin](https://sea1.discourse-cdn.com/flex015/user_avatar/community.aliceblueonline.com/community_admin/32/5185_2.png) [@community\_admin](https://community.aliceblueonline.com/u/community_admin)\
**Post date:** [September 4, 2026, 1:43pm UTC](https://community.aliceblueonline.com/t/nse-bse-pre-open-session-revised-timings-effective-september-7-2026/14512/1 "2026-09-04T13:43:31Z")

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**Dear Client,**

The National Stock Exchange (NSE) has revised the framework governing the **Pre-Open Session** , effective **Monday, September 7, 2026**. While the overall pre-open session timings will remain unchanged, the **Order Entry Period will now be divided into two phases**.

The revised timings and key changes are as follows:

- **9:00 AM – 9:05 AM | Phase 1 – Order Entry**
  - Order placement, modification and cancellation will be permitted for **both Limit and Market Orders**.

- **9:05 AM – 9:10 AM | Phase 2 – Order Entry**
  - Only **Limit Orders** can be placed, modified or cancelled.
  - **Market Orders will not be permitted and will be rejected** during this phase.
  - The system may initiate a **random closure during the last two minutes** of the order-entry period.

- **9:10 AM – 9:12 AM | Order Matching & Trade Confirmation**
  - Orders will be matched.
  - The **opening price will be determined**.
  - Trade confirmations will be processed.

- **9:12 AM – 9:15 AM | Buffer Period**
  - No change in timings.
  - This period facilitates the smooth transition from the Pre-Open Session to the **Continuous Trading Session**.

 ![image](https://us1.discourse-cdn.com/flex015/uploads/aliceblueonline/original/2X/3/31761383ab3177b3811179c390d6709f9a33d9f5.webp)

The revised framework is intended to strengthen the **price-discovery process** and bring greater alignment between the equity cash and derivatives markets, in line with the changes introduced for the **Closing Auction Session (CAS)**.

**Important for Clients:**  
Clients are advised to take note of the revised Order Entry Phases. In particular, **Market Orders will be accepted only during 9:00 AM to 9:05 AM during the Pre-Open Session**. Market Orders placed during the 9:05 AM to 9:10 AM phase will not be accepted.

_ **Alice Blue advises all clients to take note of these changes and plan their orders accordingly.** _