NSE Clearing tightens margin checks for Closing Auction orders from August 3
Orders modified or placed fresh during the Closing Auction Session will be subject to margin sufficiency validation; carried-over CTS orders are exempt.
What changed
- Carried-over CTS orders to CAS no longer checked for margin at order level.
- Modified or new CAS orders must pass margin sufficiency checks.
- CAS orders rejected if available capital is insufficient for margin.
The read
NSE Clearing just split CAS orders into two buckets. Carried-over orders from continuous trading face no margin check at order level, but any modification turns them into new orders that must pass a sufficiency test. Capital short? Order rejected. For members, the change is operational — systems must now distinguish between untouched and altered orders and enforce the rule when capital falls short. The distinction is neat: it preserves continuity for unmodified orders while preventing late-session order shuffles from inflating risk. Deadline: August 3, 2026.
Primary source: official circular (PDF)