Mock Trading on Saturday, August 01, 2026, for Equity segment
BSE notice 20260730-35 · 30 Jul 2026
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BSE has scheduled a mock trading session for the Equity segment on Saturday, August 01, 2026, to facilitate testing of system functionalities, including the Closing Auction Session (CAS) and standard operating procedures. Trading members are required to use the scrip master file generated on July 31, 2026, and the new BOLT Pro TWS version 13.30 for both the mock session and subsequent live trading starting August 03, 2026. Participants may use this session to fulfill regulatory software testing requirements. Trades executed during this session do not create legal rights, liabilities, or margin and settlement obligations. Members are requested to provide feedback by 04:30 pm on the day of the session.
What you must do
- Use the scrip master file generated on July 31, 2026, for the mock session and live trading.
- Install and use BOLT Pro TWS version 13.30 for the mock session and live trading.
Document text
NOTICE
| Notice No. | 20260730-35 |
|---|---|
| Notice Date | 30 Jul 2026 |
| Category | Trading |
| Segment | Equity |
| Department | Trading Operations |
| Subject | Mock Trading on Saturday, August 01, 2026, for Equity segment |
| Attachments | No Attachment |
Exchange has scheduled a mock trading session (from PR site) in Equity segment on Saturday August 01, 2026. As per circular no. 20260319-21, 20260610-41 & 20260728-42 issued regarding introduction of Closing Auction Session (CAS) & Standard Operating Procedures applicable from Monday 03 August 2026, mock trading session has been scheduled as follows –
Members are also requested to refer to Exchange Notice No 20201201-22 dated 1st December'2020 regarding Testing of software used in or related to Trading and Risk Management. Members may choose to participate either in Mock Trading Session or UAT environment for fulfilling their regulatory requirements in accordance to SEBI circular no. SEBI/HO/MRD1/DSAP/CIR/P/2020/234 dated November 24, 2020
Trading members using third party trading platforms can also use this opportunity to test their respective trading application during mock trading session for various functionalities (including exceptional market conditions), viz. various types of call auction sessions, risk-reduction mode, trading halt, block deals, etc.
A. Mock Trading Session timings -
| TRADING SESSIONS | FROM | TO |
|---|---|---|
| Log-in | 08:15 am | 08:45 am |
| Block Deal Window (Session 1) | 08:45 am | 09:00 am |
| Pre-Open | ||
| · Order Entry period | 09:00 am | 09:08 am^ |
| · Matching & buffer period | 09:08 am | 09:15 am |
| Continuous Trading T+1 | 09:15 am | 03:30 pm |
| Continuous Trading T+0 | 09:15 am | 01.30 pm |
| Special Pre-Open for IPO & Re-listed scrips# | ||
| · Order Entry period | 09:00 am | 09:45 am^^ |
| · Matching & buffer period | 09:45 am | 10:00 am |
| Continuous Trading# for SPOS Scrips | 10:00 am | 03:30 pm |
| Periodic Call Auction (6 sessions of 1 hour each) ^ | 09:30 am | 03:30 pm |
| Block Deal Window (Session 2) | 02:05 pm | 02:20 pm |
| Closing Auction | ||
| Continuous Trading session end & Reference price calculation (Transition from CTS to CAS) | 03:15 pm | 03:20 pm |
| Order Entry Period for both limit and market orders | 03:20 pm | 03:25 pm |
| Order entry period only for limit orders | 03:25 pm | 03:30 pm* |
| Order Matching/Confirmation Period | 03:30 pm* | 03:35 pm |
| Closing (for non-CAS securities) | 03:30 pm | 03:50 pm |
| Closing (Buffer Period for CAS securities) | 03:35 pm | 03:50 pm |
| Post- closing | 03:50 pm | 04:00 pm |
| Trade Modification T+1 | 04:15 pm | |
| Trade Modification T+0 | 01:45 pm |
^ - Random stoppage of order entry session in last 1 minute for Pre-Open session & Periodic Call Auction ^^ - Random stoppage of order entry session in last 10 minutes for Special Pre-Open for IPO & Re-listed scrips.
-
- Random stoppage of order entry in last 2 minutes & order matching period will start immediately after completion of order entry period.
B. Trading members are requested to note following Important instructions –
- No separate scrip master shall be provided on mock trading day. Scrip master file generated on end of day of Friday July 31, 2026 to be used on mock trading day as well as for live trading from Monday August 03, 2026. This file shall include details of securities available in Closing Auction Session (CAS). Member may refer the exchange circular - 20260330-40 & 20260422-15 for CAS session identifier introduced in scrip master format.
- BOLT Pro TWS version New version of BOLT Pro TWS 13.30 shall be released. This version to be used for during mock trading session & as well as for live trading from Monday August 03, 2026. It shall be available for download on July 31, 2026 from 7:00 pm onwards. Details for same shall be published via separate circular.
- Market data via NFCAST stream shall be available as per new format (version 6.2 published via circular no. 20260709-11) on the existing multicast IP & Port (multicast IP - 227.0.0.1 & Port - 18901) on mock trading day as well as for live trading from Monday August 03, 2026.
- As informed via circular no. 20260709-11, market data stream MDI / EMDI API new version 1.4.5, which is already applicable for live trading since Monday July 20, 2026, will continue to be available on mock trading day.
- Closing reference price for CAS eligible securities shall be calculated based on VWAP of trades executed between 03:00pm - 03:15pm.
Trading members using third party trading application are requested to take note and use this opportunity to test their respective trading application for CAS functionality during mock trading session.
Market participants are requested to note that the mock trading session is merely for the purpose of testing and familiarization and that the trades resulting from such mock trading will not attract any margin obligation or pay-in and pay-out obligation and will not create any rights and liabilities. Participants are requested to participate actively in the mock trading sessions.
Feedback of Mock Trading Session To be able to provide our members with a robust & efficient system for trading with better features, feedback from all members is very important. We solicit your active support and participation in this endeavor. We request all members to give their feedback for the mock trading session on the contact numbers/ email id provided below by 04:30 pm.
In case of any queries or clarifications, trading members may kindly get in touch with their respective Relationship Manager or contact either the BSE Helpdesk or the BSE Tech Support team teams for any clarification/ queries on this circular –
| TWS users (third party empaneled vendors & in-house system developers) | |
|---|---|
| BSE Tech Support | 022-22728053; bse.tech@bseindia.com |
| Help Desk | 022-45720400/600 & 022-69158500; bsehelp@bseindia.com |
For and on behalf of BSE Ltd.,
Ketan Jantre Head - Trading Operations
Sandeep Pujari DVP – Trading Operations
Source details
- Source
- BSE Ltd (Bombay Stock Exchange)
- Type
- notice
- Published by source
- 30 Jul 2026
- Document number
- 20260730-35
- Issuing division
- Trading Operations
- Coverage area
- securities