Mock trading on Saturday, July 04, 2026 - Testing of Trading modalities related to Introduction of Closing Auction Session (CAS) in Equity Cash segment

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National Stock Exchange of India Limited Circular Department: FUTURES & OPTIONS Download Ref No: NSE/FAOP/74981 Date: July 01, 2026 Circular Ref. No: 96/2026 All Members, Mock trading on Saturday, July 04, 2026 – Testing of Trading modalities related to Introduction of Closing Auction Session (CAS) in Equity Cash segment With reference to circular no. NSE/FAOP/74467 dated May 29, 2026 regarding ‘Introduction of Closing Auction Session (CAS) in the Equity Cash segment - Change in trading modalities in the Equity Derivatives segment’, and in continuation of circular (Download No. 71999) dated December 24, 2025, Exchange shall be conducting a mock trading session in the Futures & Options segment on Saturday, July 04, 2026. Further, Exchange shall be introducing new NEATPlus version (7.8.9) for aforesaid CAS implementation related testing. Members must note that said new NEATPlus version shall be applicable only during the Trading Session-1 of the mock. Post Trading session 1, members shall have to reinstall and login with earlier NEATPlus version (7.8.8) for Trading Session-2 & 3 which shall be conducted as per existing Trading modalities without changes related to CAS. Kindly refer point A, B and C for more information. Mock Date: July 04, 2026 Particulars Time in Hrs Trading Session-1 - Pre-Open Open time 08:00 Pre-Open Close time* *Random closure in last one minute 08:08 Normal Market open time 08:15 Update of Stock future price bands for alignment with CAS in Equity Cash Market 09:15 Normal Market close time 10:10 Trade Modification end time 10:20 Mock Date: July 04, 2026 Particulars Time in Hrs Trading Session-2 from Primary Site# - National Stock Exchange of India Limited Page 2 of 6 Pre-Open Open time 12:45 Pre-Open Close time* *Random closure in last one minute 12:53 Normal Market open time 13:00 Contingency Start Time 14:45 Contingency Close Time 15:45 Normal Market close time 16:00 Trading Session-3 from DR Site Pre-Open Open time 16:30 Pre-Open Close time* *Random closure in last one minute 16:38 Normal Market open time 16:45 Normal Market close time 17:30 Trade Modification end time 17:40 Re-login Timings Live Re-login start time 18:30 Live Re-login close time 19:00 #Trades from trading session 1 shall not be available in trading session 2 & 3. However, Trades from trading session 2 shall be available in trading session 3. Members are requested to actively participate in all trading sessions. Members are required to take note of the below important points: A) Below NEATPlus version should be used explicitly for mock session 1 only: Version Availability Download path on NSE Extranet path NEAT+ 7.8.9 On July 04, 2026, 07:00 hours /faoftp/faocommon/Mock/04JULY2026/NEATPlus789 B) During the trading session 1, in order to align the price band for stock future contacts applicable during the CAS in CM segment, the reference price shall be determined based on the VWAP of the trades executed in the respective stock futures between 09:00 a.m. and 09:15 a.m. C) For trading session 2 & 3 and Live trading from July 06, 2026, kindly use below NEATPlus version : Version Download Path on NSE Extranet: 7.8.8 /faoftp/faocommon/NEATPlus788 ➢ NEATPlus version (7.8.8 & 7.8.9) are compatible with new broadcast parameters. For information regarding market data parameters, kindly refer the circular NSE/MSD/74448 dated May 27, 2026. National Stock Exchange of India Limited Page 3 of 6 D) Exchange shall be conducting additional mock trading sessions in the month of July 2026 for testing of CAS in CM segment. Timings shall be communicated subsequently for respective mock days. Dates of Mock Trading Session July 11, 2026 July 18, 2026 July 25, 2026 E) Discontinuation of Order book snapshot recovery via Solace API ➢ Members may note that Order book snapshot recovery via Solace API shall be discontinued from July 04, 2026. Hence, members may mandatorily migrate to Order book snapshot recovery via TCP/IP (refer circular NSE/MSD/74567 dated June 05, 2026). F) Updation of New CA Certificate & new interactive port ➢ Members are requested to refer to circular no. NSE/MSD/74511 dated June 02, 2026 regarding new CA certificate and NSE/MSD/74559 dated June 05, 2026 for new version of Neat Adapter EXE application. Accordingly, members are requested to use the combination of new NEAT adapter version and new ports applicable for F&O derivatives segment as below: Login through Dates Applicable GR PORT New NEAT Adapter application Version 1.0.29 for Windows Neat Adapter Version 1.0.29 for Linux Neat Adapter Mandatory from July 04, 2026 (mock) 10841 Members using Direct connection through NNF users, are requested to download and use the new CA certificate which is available in Extranet path ( /faoftp/faocommon/Encryption_CA_Certificate/2026_Certificate). Accordingly, members shall ensure readiness of their migration plan by July 04, 2026. The applicable new interactive parameters to be used with ‘New CA certificate’: Segment Gateway Router Gateway IPs Subnet ranges IP Address New Port Network Mask Port F&O Derivatives (FO) 172.19.13.85 10837 172.19.13.0 255.255.255.128 10820 10841* 10843** *Port – This port will support new encryption messages with MD5 checksum removal. **Port - This port will support new encryption messages with MD5 checksum removal and new immediate Ack request for order related messages. For other important instructions regarding the mock trading, kindly refer to the following Annexure: Annexure 1: Important instructions regarding mock trading session. National Stock Exchange of India Limited Page 4 of 6 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 Particulars Details Connectivity Parameters: Refer to circular NSE/MSD/74511 dated June 02, 2026 for interactive connectivity details. Installation Guide: Available on NSE Extranet at /faoftp/faocommon/Installation_Procedure. NEAT Version: NEATPlus 7.8.8 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: NOTIS application will be accessible during the mock session -2 & 3. Toll Free No Email id 1800-266-0050 (Option 1) msm@nse.co.in National Stock Exchange of India Limited Page 5 of 6 Participation: Members should participate using all trading software and re-login into live environment to ensure smooth connectivity for Monday, July 06, 2026. Live Updates: Visit www.nseindia.com for any session-related updates. Support: For queries, call Toll-Free: 1800 266 0050 (Option 1). Annexure – 2 Pre-requisites / General guidelines for participating in the Mock environment Pre-requisites / General guidelines Heads Details Eligibility All members enabled for trading in the Futures & Options (FO) 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. National Stock Exchange of India Limited Page 6 of 6 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.