Description

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

Summary

BSE has scheduled a mock trading session for the Equity segment on Saturday, January 10, 2026. The session will test various trading functionalities including exceptional market conditions, call auction sessions, risk-reduction mode, trading halt, and block deals. A new BOLT Pro TWS version 12.50 will be released. The session will also test the BSE-NSE interoperability mechanism established per SEBI directive, 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 10, 2026
  • New BOLT Pro TWS version 12.50 will be released (details in separate circular)
  • Testing will cover multiple functionalities: call auction sessions, risk-reduction mode, trading halt, block deals
  • BSE and NSE will test interoperability scenario with simulated NSE outage
  • Trading members using third-party platforms can test their applications
  • Feedback required from all members by 2:00 PM on mock trading day

Trading Schedule

Session Timings:

  • Log-in: 10:15 AM - 10:45 AM
  • Morning Block Deal Window: 10:45 AM - 11:00 AM
  • Pre-Open Order Entry: 11:00 AM - 11:08 AM (random stoppage in last 1 minute)
  • Pre-Open Matching: 11:08 AM - 11:15 AM
  • Continuous Trading T+1: 11:15 AM - 02:00 PM
  • Continuous Trading T+0: 11:15 AM - 01:30 PM
  • Special Pre-Open for IPO & Re-listed Scrips Order Entry: 11:00 AM - 11:45 AM (random stoppage in last 10 minutes)
  • Special Pre-Open Matching: 11:45 AM - 12:00 PM
  • Continuous Trading for SPOS Scrips: 12:00 PM - 02:00 PM
  • Periodic Call Auction (2 sessions of 1 hour): 11:30 AM - 01:30 PM
  • Auction for Settlement Details: 12:00 PM - 12:45 PM
  • Afternoon Block Deal Window: 12:50 PM - 01:05 PM
  • Closing: 02:00 PM - 02:10 PM
  • Post-closing: 02:10 PM - 02:20 PM
  • Trade Modification T+1: Until 02:30 PM
  • Trade Modification T+0: 01:45 PM

Regulatory Changes

No new regulatory changes introduced. This mock trading session implements the existing SEBI directive (SEBI/HO/MRD/TPD/P/CIR/2024/167 dated November 28, 2024) regarding business continuity mechanism for interoperable segments through alternate trading venues.

Compliance Requirements

  • Trading members are requested to actively participate in the mock trading session
  • Members must test their trading platforms and applications during the session
  • Third-party trading platform users should utilize this opportunity for comprehensive testing
  • Members must provide feedback by 2:00 PM on January 10, 2026
  • Members should be prepared for the NSE outage simulation scenario where BSE will act as alternate venue
  • Watch for broadcast message: “NSEEQ excl scrips avlble from hh:mm” during NSE outage simulation

Important Dates

  • January 10, 2026 (Saturday): Mock trading session from 10:15 AM to 02:30 PM
  • January 10, 2026, 2:00 PM: Deadline for member feedback submission

Contact Information

For queries or clarifications:

Impact Assessment

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

Operational Impact: Low to Medium - Trading members need to allocate resources for testing on a Saturday. This provides valuable opportunity to test systems, identify issues, and ensure readiness for actual trading scenarios including disaster recovery procedures.

Technical Impact: The release of BOLT Pro TWS version 12.50 and testing of BSE-NSE interoperability mechanism are important for system resilience and business continuity preparedness.

Impact Justification

Routine mock trading session for system testing purposes with no direct market impact; primarily operational and technical in nature for trading members