National Stock Exchange of India Limited
Circular
| Department: FUTURES & OPTIONS | |
|---|
| Download Ref No: NSE/FAOP/75209 | Date: July 15, 2026 |
| Circular Ref. No: 102/2026 | |
All Members,
Mock trading on Saturday, July 18, 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’, Exchange shall be conducting a mock trading session in the Futures & Options segment on Saturday, July 18, 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 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 18, 2026 | |
|---|
| Particulars | Time in Hrs |
| Trading Session-1 | - |
| Pre-Open Open time | 10:00 |
| Pre-Open Close time* Random closure in last one minute | 10:08 |
| Normal Market open time | 10:15 |
| Update of Stock future price bands for alignment with CAS in Equity Cash Market | 10:40 |
| Normal Market close time | 12:25 |
| Trade Modification end time | 12:35 |
| Mock Date: July 18, 2026 | |
|---|
| Particulars | Time in Hrs |
| Trading Session-2 from DR Site# | - |
| Pre-Open Open time | 16:45 |
| Pre-Open Close time* Random closure in last one minute | 16:53 |
| Normal Market open time | 17:00 |
| Normal Market close time | 18:00 |
| Trade Modification end time | 18:10 |
| Re-login Timings | |
| Live Re-login start time | 19:00 |
| Live Re-login close time | 19:30 |
#Trades from trading session 1 shall not be available in trading session 2. 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 18, 2026, 07:00 hours | /faoftp/faocommon/Mock/18JULY2026/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 10:25 a.m. and 10:40 a.m.
C) For trading session 2 and Live trading from July 20, 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.
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 day.
| Dates of Mock Trading Session |
|---|
| July 25, 2026 |
For other important instructions regarding the mock trading, kindly refer to the following Annexure:
Annexure 1: Important instructions regarding mock trading session.
Annexure 2: Pre-requisites / General guidelines for participating in the Mock environment.
For and on behalf of
National Stock Exchange of India Limited
Aarti Surve
Chief Manager
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. |
| 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 |
