Mock trading from BCP/DR site on Saturday, August 22, 2026 · 21 Aug 2026

National Stock Exchange of India Limited

Circular

All Members,

Mock trading from BCP/DR site on Saturday, August 22, 2026

Exchange shall be conducting a mock trading session on Saturday, August 22, 2026 from BCP site. The mock will be followed by a Re-Log in session from Primary site in order to avoid login problems on Monday, August 24, 2026. The schedule of the mock trading is as follows:

Mock trading from BCP Site:

Re-Log in Session from Primary Site:

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, August 21, 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

Annexure - 1

Important instructions regarding mock trading session

Annexure – 2

Pre-requisites / General guidelines for participating in the Mock environment

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. |

Annexure – 3

Important guidelines in case of switchover of trading system to Disaster Recovery (DR) Site

1. Kindly note below points after switch over to DR site: a. Trades of primary site will be available in Previous Trades window. b. Trades can be modified/cancelled using Multiple Trade Modification and Cancellation window respectively. c. Messages of primary site will be available in TWS Message Area.
2. If user renames or deletes the User folder and re-login the NEAT terminal, then data of primary site shall not be available in the functional window as mentioned above point.