BSE20 Aug 2026noticePrepared by Complied AI

Mock Trading on Saturday, August 22, 2026, for Equity segment

BSE notice 20260820-29 · 20 Aug 2026

BSE schedules a mock trading session for the Equity segment on August 22, 2026. This session allows trading members to test trading applications and systems. Members using third-party platforms or in-house systems through ETI APIs must test changes related to modifications in the Pre-open Call Auction Session. The session includes various trading phases such as Block Deal, Pre-Open, Continuous Trading, and Closing Auction. Trades from this session do not create margin, pay-in, or pay-out obligations. Members must provide feedback to the exchange by 12:00 pm on the day of the session. Participation is voluntary but encouraged for system familiarization.

Official record

Open source page

Summary

Check the official record

What changed

Who is affected: Trading members using third party trading platforms of empaneled vendors or in-house developed systems through ETI APIs.
Required action: Test trading applications for changes related to modifications in the Pre-open Call Auction Session.
Submit feedback for the mock trading session by 12:00 pm.
Key dates: Mock trading session date — 21 Aug 2026
Consequences: Trades from the mock session do not create margin, pay-in, or pay-out obligations.

Prepared automatically from the captured official document and checked against source evidence. This is not an independent professional review. See how briefs are prepared. Verify material decisions against the official record.

Source details

Source: BSE Ltd (Bombay Stock Exchange)
Type: notice
Published by source: 20 Aug 2026
Document number: 20260820-29
Issuing division: Trading Operations
Coverage area: securities

Document text

Prepared for reading; wording retained from the source.

Verify official record

NOTICE

Notice No.	20260820-29
Notice Date	20 Aug 2026
Category	Trading
Segment	Equity
Department	Trading Operations
Subject	Mock Trading on Saturday, August 22, 2026, for Equity segment
Attachments	No Attachment

Exchange has scheduled a mock trading session (from PR site) in Equity segment on Saturday August 22, 2026. As per circular no. 20260803-35 regarding "Modifications in Pre-open Call Auction Session" in the Equity Segment, the relevant changes have been made available for testing during the mock trading session scheduled as follows –

Trading members using third party trading platforms of empaneled vendors or in-house developed systems through ETI APIs can use this opportunity to test their respective trading application during mock trading session for various functionalities (including exceptional market conditions), viz. risk-reduction mode, trading halt, etc.

Trading Session	From	To
Log in	08:15 am	08:45 am
Block Deal Session	08:45 am	09:00 am
Pre-Open
Order Entry Period Both limit and market orders	09:00 am	09:30 am
Order Entry only for Limit Orders	09:30 am	09:55 am*
Order Entry Matching/Confirmation Period	09:55 am*	10:00 am
Continuous Trading (T+1)	10:00 am	12:00 pm
Continuous Trading (T+0)	10:00 am	10:45 am
Special Pre-Open for IPO & Re-listed scrips#
Order Entry Period	09:00 am	10:05 am^^
Matching & Buffer Period	10:05 am	10:15 am
Continuous Trading# for SPOS Scrips	10:15 am	12:00 pm
Period Call Auction Session (1 session of 1 hour)	10:00 am	11:00 am^
Closing Auction Session (CAS)
Continuous Trading session end & Reference price calculation (Transition from CTS to CAS)	11:00 am	11:05 am
Order Entry Period Both limit and market orders	11:05 am	11:35 am
Order Entry only for Limit Orders	11:35 am	12:00 pm*
Order Entry Matching/Confirmation Period	12:00 pm*	12:05 pm
Closing (for non-CAS securities)	12:00 pm	12:10 pm
Closing (Buffer Period for CAS securities)	12:05 pm	12:10 pm
Post-Closing	12:10 pm	12:20 pm
Trade Modification (T+1)		12:20 pm
Trade Modification (T+0)		11:00 am

^ - Random stoppage in last 1 minute of order entry session
^^ - 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.

There shall be no new BOLT TWS Release.

Trading members using third party trading application are requested to take note and use this opportunity to test their respective trading application for changes related to ‘Modifications in Pre-open Call Auction Session’ 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 12:00 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

Research the source law

Find the provision behind this update.

No high-confidence provision match was found. Browse the law library, choose the affected provision and ask against the exact statutory text.

Browse source laws