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The National Stock Exchange conducts a mock trading session on October 31, 2026, from its Primary and BCP sites. This session includes a Re-Log in period from the Primary site to ensure system readiness for the next trading day. Members must participate using their existing trading software and configurations. The Exchange performs a non-graceful shutdown during the transition from the Primary site to the DR site. Members must clear all outstanding orders before the BCP site session starts. Trades executed during this mock session do not result in any fund pay-in or pay-out. Participants must use NEAT version 3.5.4 and Neat Adapter version 1.0.29 for connectivity.
What you must do
Key dates
Who is affected
If you do not comply
Ask about this circular
| Download Ref No: NSE/CD/77197 | Date: October 30, 2026 |
|---|---|
| Circular Ref. No: 45/2026 |
All Members,
Mock trading from BCP/DR site on Saturday, October 31, 2026
Exchange shall be conducting a mock trading session on Saturday, October 31, 2026 from Primary and BCP site. The mock will be followed by a Re-Log in session from Primary site in order to avoid login problems on Monday, November 02, 2026. The schedule of the mock trading is as follows:
Mock trading from Primary Site:
| Trading Session-1 | Time in hrs |
|---|---|
| Normal Market open time | 09:00 |
| Normal Market close time | 12:00 |
Mock trading from BCP Site:
| Trading Session-2 | Time in hrs |
|---|---|
| Normal Market open time | 12:45 |
| Normal Market close time | 17:00 |
| Trade modification end time | 17:30 |
Re-Log in Session from Primary Site:
| Re-Log in Session | Time in hrs |
|---|---|
| Live Re-login start time | 18:30 |
| Live Re-login close time | 19:00 |
Members are required to perform the following:
For connecting to Primary/DR site, no changes in NEAT Adapter settings are required. Settings of live session as of Friday, October 30, 2026 in NEAT Adapter shall be retained to connect to all the above sessions of Primary/DR site.
Members are requested to note that Exchange shall shift its operation from primary site to DR site during the mock session and it shall be a non-graceful shutdown from the primary site. In case of such event necessary action should be taken at member's end as stated in circular NSE/MSD/48662 dated June 18, 2021 to bring their systems into a consistent state.
All the outstanding orders shall be purged before the start of trading from BCP site. Members using NNF software should clear the outstanding orders of session 1 in their systems before trading from BCP site.
Members should note that for Multicast TBT, sequence number will start from ‘1’ once trading starts from BCP site.
Latencies experienced by Colo Participants will be different on Disaster Recovery/BCP day as compared to a normal trading day.
For other important instructions members may refer to the following:
Annexure 1: Operational instructions for BCP mock trading session.
Annexure 2: Pre-requisites / General guidelines for participating in the Mock environment.
Annexure 3: Important guidelines in case of switchover of trading system to Disaster Recovery (DR) Site
For and on behalf of
National Stock Exchange of India Limited
Khushal Shah
Associate Vice President
| Toll Free No | Email id |
|---|---|
| 1800-266-0050 (Option 1) | msm@nse.co.in |
Important instructions regarding mock trading session
| Particulars | Details |
|---|---|
| Connectivity Parameters: | Refer to circular NSE/MSD/74511 dated June 02, 2026 & NSE/MSD/73993 dated April 30, 2026 for interactive connectivity details. |
| Installation Guide: | Available on NSE Extranet at /cdsftp/cdscommon/Installation_Procedure. |
| NEAT Version: | NEAT 3.5.4 |
| Neat Adapter Version: | 1.0.29 |
| Order Purge: | All outstanding orders will be cleared before each session. Members using NNF software must manually clear orders in their systems. |
| Software Testing: | Refer to circular NSE/MSD/46441 and SEBI circular SEBI/HO/MRD1/DSAP/CIR/P/2020/234. Members may use either Mock Trading or Simulated Environment to meet regulatory requirements. |
| No Financial Obligation: | Trades during mock sessions will not result in any fund pay-in or pay-out. |
| UCC/PAN Validity: | With reference to Exchange circular NSE/ISC/51754 dated March 24, 2022 and NSE/ISC/52722 dated June 23, 2022 issued by Investor Services Cell and updated from time to time : |
| • Only valid and compliant UCC/PAN uploaded and approved before cutoff will be allowed. | |
| • For queries, contact uci@nse.co.in. | |
| UCC Validation will be skipped during contingency time for order entry. | |
| NOTIS Availability: | The NOTIS application will be accessible during the mock session. |
| Extranet / Member portal availability | Connect2NSE and Extranet facility shall not be available from 11:15 am to 12:30 pm and 06:00 pm to 08:00 pm. |
| Participation: | Members should participate using all trading software and re-login into live environment to ensure smooth connectivity for Monday, November 02, 2026. |
| Live Updates: | Visit www.nseindia.com for any session-related updates. |
| Support: | For queries, call Toll-Free: 1800 266 0050 (Option 1). |
Pre-requisites / General guidelines for participating in the Mock environment
| Pre-requisites / General guidelines Heads | Details |
|---|---|
| Eligibility | All members enabled for trading in the Currency Derivatives (CD) segment in the live market are automatically eligible for mock trading. |
| Participation is enabled using existing User IDs, IPs, and Box ID mappings from the live environment. | |
| Telnet Connectivity | Ensure you can successfully telnet the Exchange host from the IP address you intend to use. |
| Box ID Setup | Confirm that the Box ID is created on the IP with appropriate messages for the segment you wish to trade in. |
| NNF Application Users | If using Non-NEAT Frontend (NNF): |
| a) User ID must be of dealer type. | |
| b) It must be converted for NNF. | |
| C) It must be mapped with the IP. | |
| Branch/User Limits | Set appropriate branch and user limits from the Corporate Manager Terminal before placing orders in the mock session. |
| Exchange Requests for Mock Participation | Send email requests for the following actions with User ID and segment details: |
| a) Pro Enablement | |
| b) CTCL Conversion (only dealer IDs) | |
| c) Password Reset for Corporate Manager User ID | |
| d) Unlocking of Corporate Manager User ID | |
| e) Change of Trading Rights (e.g., PRO to CLI, PRO+CLI) | |
| Password Management | Corporate Manager User ID: Exchange will assist with reset/unlock via email. |
| Other User IDs: Members must reset/unlock these themselves using the Corporate Manager Terminal. |
Important guidelines in case of switchover of trading system to Disaster Recovery (DR) Site
