Description
NSE will conduct mock trading session on January 10, 2026. UCC live environment will be unavailable from 10 AM to midnight, and any UCC modifications during this period will be purged.
Summary
NSE will conduct a mock trading session on Saturday, January 10, 2026, following earlier circulars (NSE/CMTR/72237, NSE/FAOP/72235, NSE/CD/72199, NSE/SLBS/72225, and NSE/COM/72200). The Unique Client Code (UCC) live environment will be unavailable from 10 AM until midnight on January 10, 2026. Any UCC records added or modified during this period will not be valid for live trading starting Monday, January 12, 2026, and will be purged from the system by end of day on January 10, 2026.
Key Points
- Mock trading session scheduled for Saturday, January 10, 2026
- UCC live environment unavailable from 10 AM to midnight on January 10, 2026
- Any UCC additions or modifications during this period will be purged and not valid for live trading
- Members must refrain from making any UCC modifications/uploads during the blackout period
- Live trading resumes Monday, January 12, 2026
- Circular issued by Investor Services Cell department
Regulatory Changes
No permanent regulatory changes. This is a temporary system unavailability for mock trading purposes.
Compliance Requirements
- Members must avoid adding or modifying UCC records between 10 AM and midnight on Saturday, January 10, 2026
- Members should plan UCC updates before 10 AM on January 10, 2026, or after midnight to ensure validity for live trading sessions
- Members must ensure all necessary UCC records are updated before the blackout period to avoid disruption in live trading from January 12, 2026
Important Dates
- January 9, 2026: Circular issued
- January 10, 2026: Mock trading session; UCC system unavailable from 10 AM to midnight
- January 10, 2026: End of day - UCC records added/modified during blackout period will be purged
- January 12, 2026: Live trading resumes (Monday)
Impact Assessment
Operational Impact: Medium - Members must plan their UCC management activities around the blackout period. Failure to comply may result in invalid client codes and inability to trade for affected clients when live trading resumes on January 12, 2026.
Market Impact: Low - This is a routine mock trading exercise with no impact on live markets. However, members must coordinate internally to ensure no critical UCC updates are scheduled during the blackout window.
Member Action Required: Members should communicate this blackout period to relevant teams handling client onboarding and UCC management to prevent operational issues.
Impact Justification
Routine mock trading session with temporary UCC system unavailability. Members must avoid UCC modifications during the specified period to prevent data loss.