Applicability of Short-Term Additional Surveillance Measure
NSE circular NSE/SURV/76397 · 17 Sept 2026
Official title
Applicability of Short-Term Additional Surveillance Measure (ST-ASM)
Official record
Open source pageSummary
Check the official recordWhat changed
The National Stock Exchange of India Limited identifies specific securities for inclusion under Short-Term Additional Surveillance Measure (ST-ASM) Stage I and Stage II. These securities meet the criteria for surveillance based on market activity. For Stage I securities, the exchange applies a margin rate of 50 percent or the existing margin, whichever is higher, capped at 100 percent. For Stage II securities, the exchange applies a margin rate of 100 percent. These margin requirements apply to all open positions as of September 18, 2026, and all new positions created from September 21, 2026. This measure operates alongside other existing surveillance measures. The inclusion of securities in this list does not represent an adverse action against the concerned entities.
What you must do
- Apply a 50 percent margin rate or the existing margin for Stage I securities.
- Apply a 100 percent margin rate for Stage II securities.
Key dates
Document text
National Stock Exchange of India Limited
Circular
| Department: SURVEILLANCE | |
|---|---|
| Download Ref No: NSE/SURV/76397 | Date: September 17, 2026 |
| Circular Ref. No: 721/2026 |
To All NSE Members
Sub: Applicability of Short-Term Additional Surveillance Measure (ST-ASM)
This is further to Exchange Circular nos. NSE/SURV/39265, NSE/SURV/46557, NSE/SURV/52144, NSE/SURV/58558 and NSE/SURV/64066 dated October 27, 2018, December 04, 2020, April 28, 2022 September 25, 2023 and September 20, 2024 respectively, in respect of Additional Surveillance Measure (ASM).
Members are hereby requested to note that the securities as per attached Annexure I have satisfied the criteria for inclusion under ST-ASM Stage I. The applicable surveillance actions shall be as per provisions of the Short-Term Additional Surveillance Measure (ST-ASM) which are as under:
- Applicable rate of margin shall be 50% or existing margin, whichever is higher, subject to maximum rate of margin capped at 100% w.e.f. September 21, 2026 on all open positions as on September 18, 2026 and new positions created from September 21, 2026.
Securities as per attached Annexure I have satisfied the criteria for inclusion under ST-ASM Stage II. The applicable surveillance actions shall be as per provisions of the Short-Term Additional Surveillance Measure (ST-ASM) which are as under:
- Applicable margin rate shall be 100% or existing margin whichever is higher subject to maximum rate of margin capped at 100%. w.e.f. September 21, 2026 on all open positions as on September 18, 2026 and new positions created from September 21, 2026.
Market participants may note that ASM framework shall be in conjunction with all other prevailing surveillance measures being imposed by the Exchanges from time to time.
Continuation Sheet
National Stock Exchange of India Limited
Further, it may also be noted that the shortlisting of securities under ASM is purely on account of market surveillance, and it should not be construed as an adverse action against the concerned company / entity.
For more information on Additional Surveillance Measure please refer to our Frequently Asked Questions (FAQs) - https://www.nseindia.com/regulations/additional-surveillance-measure
In case of any further queries, you may write to us at surveillance@nse.co.in.
For National Stock Exchange of India Limited
Amit Shinde
Chief Manager
Surveillance
Source details
- Source
- National Stock Exchange of India
- Type
- circular
- Published by source
- 17 Sept 2026
- Document number
- NSE/SURV/76397
- Issuing division
- SURVEILLANCE
- Effective date
- 21 Sept 2026
- Coverage area
- securities