Description

NSE will conduct mock trading session from Primary and BCP/DR sites on December 20, 2025, followed by Re-Login session to avoid login issues on December 22, 2025.

Summary

NSE Commodity Derivatives segment will conduct a mock trading session on Saturday, December 20, 2025, from both Primary and BCP/DR sites. The mock will include trading from Primary site (09:00-12:00 hrs), BCP site (12:45-17:15 hrs), and a Re-Login session from Primary site (18:30-19:00 hrs) to prevent login issues on Monday, December 22, 2025.

Key Points

  • Mock trading session scheduled for December 20, 2025 (Saturday)
  • Primary site session: 09:00 to 12:00 hrs
  • BCP/DR site session: 12:45 to 17:15 hrs (trade modification ends at 17:15)
  • Re-Login session from Primary site: 18:30 to 19:00 hrs
  • Non-graceful shutdown will occur during switchover from Primary to DR site
  • All outstanding orders will be purged before BCP site trading starts
  • No changes required in NEAT Adapter settings
  • Multicast TBT sequence numbers will restart from ‘1’ when trading begins from BCP site
  • NOTIS application will be accessible during session-2
  • NEAT Version: 1.5.3

Regulatory Changes

No regulatory changes introduced. This is a business continuity and disaster recovery testing exercise as per existing SEBI requirements for exchange infrastructure resilience.

Compliance Requirements

  • Members must retain Friday, December 19, 2025 NEAT Adapter settings for all sessions
  • Members using NNF software must manually clear outstanding orders from session 1 before trading from BCP site
  • Members should follow instructions per circular NSE/MSD/48662 dated June 18, 2021 to bring systems into consistent state during non-graceful shutdown
  • UCC/PAN validity requirements apply as per circulars NSE/ISC/51754 (March 24, 2022) and NSE/ISC/52722 (June 23, 2022) - only valid and compliant UCC/PAN uploaded before cutoff will be allowed
  • Members should refer to software testing requirements per circular NSE/MSD/46441 and SEBI circular SEBI/HO/MRD1/DSAP/CIR/P/2020/234

Important Dates

  • December 19, 2025: Last day for retaining NEAT Adapter settings
  • December 20, 2025:
    • 09:00-12:00 hrs: Mock trading from Primary site
    • 12:45-17:00 hrs: Mock trading from BCP site
    • 17:15 hrs: Trade modification end time
    • 18:30-19:00 hrs: Re-Login session from Primary site
  • December 22, 2025: Regular trading resumes (Monday)

Impact Assessment

Operational Impact: Members must participate in the mock session to test their systems’ ability to handle failover scenarios. The non-graceful shutdown during switchover simulates real disaster recovery conditions, requiring members to verify their infrastructure readiness.

Market Impact: No financial obligations or actual settlements will arise from mock trading. All trades are for testing purposes only.

Technical Impact: Members need to ensure their systems can handle order purging, sequence number resets for Multicast TBT, and connectivity switches between Primary and DR sites without manual intervention issues.

Risk Mitigation: The Re-Login session on Saturday evening is specifically designed to prevent potential login failures when regular trading resumes on Monday, reducing operational risk for the start of the trading week.

Impact Justification

Operational mock session to ensure business continuity preparedness; no financial impact but requires member participation for testing DR site failover procedures