Description
NSE announces mock trading session on April 11, 2026, with UCC live environment unavailable from 10 AM till midnight. Members advised to refrain from UCC modifications during this period.
Summary
NSE’s Investor Services Cell has issued a notice informing all members about the UCC (Unique Client Code) system unavailability on Saturday, April 11, 2026, in conjunction with the Exchange’s mock trading session. This circular supplements earlier circulars (NSE/CMTR/73692, NSE/FAOP/73687, NSE/CD/73690, NSE/COM/73691, and NSE/SLBS/73686) dated April 10, 2026, which announced the mock trading session itself.
Key Points
- Mock trading session will be conducted on Saturday, April 11, 2026
- UCC live environment will be unavailable from 10 AM till midnight on Saturday, April 11, 2026
- Any UCC additions or modifications made during the unavailability window will not be valid for live trading on Monday, April 13, 2026 onwards
- Invalid UCC records created during this period will be purged from the Exchange’s UCC system by end of day on April 11, 2026
- Members are advised to refrain from any UCC modification or uploads between 10 AM and midnight on April 11, 2026
Regulatory Changes
No new regulatory changes introduced. This is an operational notice supplementing previously issued mock trading circulars.
Compliance Requirements
- Members must not make any UCC modifications or uploads between 10 AM and midnight on Saturday, April 11, 2026
- Members should ensure all necessary UCC updates are completed before 10 AM on April 11, 2026, or after midnight to ensure validity for the Monday live trading session
- Members should communicate this restriction to relevant internal teams handling client onboarding and KYC updates
Important Dates
- April 11, 2026 (Saturday): Mock trading session; UCC live environment unavailable from 10 AM till midnight
- April 11, 2026: Purging of invalid UCC records by end of day
- April 13, 2026 (Monday): Next live trading session; UCC changes made during blackout period will not be valid
Impact Assessment
This circular has a moderate operational impact on all NSE members. Firms that routinely process client onboarding or KYC modifications on weekends will need to reschedule such activities to avoid the 10 AM–midnight blackout window on April 11. Any inadvertent UCC changes during this period risk being purged, potentially causing client trading disruptions on Monday, April 13. The impact is time-bound and limited to the mock trading window, with no lasting regulatory or market structure changes.
Impact Justification
Operational notice affecting all members regarding UCC unavailability during mock trading; no regulatory changes but requires member action to avoid invalid UCC modifications that could affect Monday live trading.