Description

BSE announces mock trading session on Saturday, December 06, 2025 for Equity segment with new BOLT Pro TWS version 12.40 release and revised block deal framework testing.

Summary

BSE has scheduled a mock trading session for the Equity segment on Saturday, December 06, 2025. This session allows trading members to test their systems and fulfill regulatory requirements as per SEBI circular SEBI/HO/MRD1/DSAP/CIR/P/2020/234 dated November 24, 2020. Members can participate either in the mock trading session or UAT environment. The session will include the release of new BOLT Pro TWS version 12.40 and testing of the revised block deal framework effective from December 08, 2025.

Key Points

  • Mock trading session scheduled for Saturday, December 06, 2025 for Equity segment
  • New BOLT Pro TWS version 12.40 will be released (details in separate circular)
  • Members can choose between mock trading session or UAT environment for regulatory compliance
  • Testing opportunity for third-party trading platforms and various functionalities including call auctions, risk-reduction mode, trading halt, and block deals
  • Revised block deal framework (per circular 20251121-69) to be tested during mock session
  • Feedback required from all members by 4:30 PM on mock trading day
  • Session covers both T+1 and T+0 trading segments

Regulatory Changes

No new regulatory changes introduced. The mock session facilitates compliance with existing SEBI circular no. SEBI/HO/MRD1/DSAP/CIR/P/2020/234 dated November 24, 2020 regarding testing of software used in trading and risk management.

Revised block deal framework (circular 20251121-69 dated November 21, 2025) will go live from Monday, December 08, 2025, and members can test this during the mock session.

Compliance Requirements

  • Trading members must test their trading and risk management software as per SEBI requirements
  • Members using third-party trading platforms should test all functionalities during the mock session
  • Members are requested to participate in the mock session to test the revised block deal framework before it goes live on December 08, 2025
  • Feedback must be submitted by 4:30 PM on December 06, 2025
  • Members should refer to Exchange Notice No. 20201201-22 dated December 1, 2020 for testing guidelines

Important Dates

  • December 04, 2025: Notice date
  • December 06, 2025: Mock trading session (Saturday)
    • Login: 8:15 AM - 8:45 AM
    • Morning Block Deal Window: 8:45 AM - 9:00 AM
    • Pre-Open: 9:00 AM - 9:15 AM
    • Continuous Trading T+1: 9:15 AM - 3:30 PM
    • Continuous Trading T+0: 9:15 AM - 1:30 PM
    • Periodic Call Auction: 10:30 AM - 3:30 PM (5 sessions of 1 hour)
    • Afternoon Block Deal Window: 2:05 PM - 2:20 PM
    • Closing: 3:30 PM - 3:40 PM
    • Post-closing: 3:40 PM - 4:00 PM
    • Feedback deadline: 4:30 PM
  • December 08, 2025: Revised block deal framework goes live (Monday)

Impact Assessment

Market Impact: Minimal. This is a non-trading day mock session with no actual market transactions.

Operational Impact: Low to medium for trading members who need to allocate resources for testing on Saturday. The mock session provides valuable testing opportunity before the revised block deal framework goes live on December 08, 2025.

Member Benefits:

  • System testing in controlled environment
  • Familiarization with new BOLT Pro TWS version 12.40
  • Testing of revised block deal framework before live implementation
  • Compliance with SEBI regulatory requirements
  • Testing exceptional market conditions and various trading scenarios

Support Available: BSE Tech Support and Helpdesk available for queries and clarifications throughout the mock session.

Impact Justification

Routine mock trading session for system testing and regulatory compliance. No direct market impact, affects only trading members' testing activities.