Description

BSE has scheduled a mock trading session for the Equity segment on Saturday, January 10th, 2026, including release of new BOLT Pro TWS version 12.50 and testing of NSE-BSE interoperability mechanism.

Summary

BSE has scheduled a mock trading session for the Equity segment on Saturday, January 10th, 2026. The session will include the release of new BOLT Pro TWS version 12.50 and testing of various trading functionalities. Additionally, BSE and NSE will test the interoperability mechanism for business continuity, simulating an NSE outage scenario where BSE serves as an alternate trading venue for NSE exclusive securities.

Key Points

  • Mock trading session scheduled for Saturday, January 10th, 2026
  • New BOLT Pro TWS version 12.50 will be released (details in separate circular)
  • Login starts at 10:15 AM, sessions run until 2:20 PM (post-closing)
  • Testing will include call auction sessions, risk-reduction mode, trading halt, block deals, and other functionalities
  • BSE-NSE interoperability testing: NSE outage will be simulated with BSE as alternate venue for NSE exclusive securities
  • Third-party trading platform users can participate in testing
  • Feedback required by 2:00 PM on the mock trading day

Regulatory Changes

Implementation of SEBI circular SEBI/HO/MRD/TPD/P/CIR/2024/167 dated November 28, 2024, requiring BSE and NSE to establish business continuity mechanism with alternative trading venue for interoperable segment. BSE previously communicated implementation via circular 20250328-18 dated March 28, 2025.

Compliance Requirements

  • Trading members using third-party platforms should utilize this opportunity to test their applications
  • Members must provide feedback by 2:00 PM on mock trading day
  • Members should be prepared for broadcast message on invocation: “NSEEQ excl scrips avlble from hh:mm”
  • Contact BSE Helpdesk (022-45720400/600 & 022-69158500; bsehelp@bseindia.com) or BSE Tech Support (022-22728053; bse.tech@bseindia.com) for queries

Important Dates

  • January 10, 2026: Mock trading session
    • 10:15 AM - 10:45 AM: Log-in
    • 10:45 AM - 11:00 AM: Morning Block Deal Window
    • 11:00 AM - 11:15 AM: Pre-Open (order entry and matching)
    • 11:15 AM - 02:00 PM: Continuous Trading T+1
    • 11:15 AM - 01:30 PM: Continuous Trading T+0
    • 11:30 AM - 01:30 PM: Periodic Call Auction (2 sessions of 1 hour)
    • 12:00 PM - 12:45 PM: Auction for Settlement Details
    • 12:50 PM - 01:05 PM: Afternoon Block Deal Window
    • 02:00 PM - 02:10 PM: Closing
    • 02:10 PM - 02:20 PM: Post-closing
    • By 2:00 PM: Feedback submission deadline

Impact Assessment

Minimal market impact as this is a mock trading session on a non-trading day (Saturday). The session provides a critical testing opportunity for:

  1. System Readiness: Members can test new BOLT Pro TWS version 12.50 before live deployment
  2. Business Continuity: Testing of BSE-NSE interoperability ensures preparedness for actual outage scenarios
  3. Operational Resilience: Validation of exceptional market conditions handling (trading halts, risk-reduction mode, etc.)
  4. Third-Party Integration: Vendors and in-house developers can validate their trading applications

No impact on live trading or settlement activities. Testing enhances overall market infrastructure robustness and disaster recovery capabilities.

Impact Justification

Routine mock trading session for system testing and version upgrade; no market impact on live trading