Applicability of Short-Term Additional Surveillance Measure (ST-ASM)
NSE circular 597/2026 · 06 Aug 2026
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The National Stock Exchange of India has identified specific securities for inclusion under Stage I and Stage II of the Short-Term Additional Surveillance Measure (ST-ASM) framework. For securities under Stage I, the applicable margin rate is set at 50% or the existing margin, whichever is higher, capped at 100%. For securities under Stage II, the margin rate is set at 100% or the existing margin, whichever is higher. These measures apply to all open positions as of August 7, 2026, and all new positions created from August 10, 2026. This action is part of routine market surveillance and does not constitute an adverse action against the affected entities.
What you must do
- Apply a margin rate of 50% or existing margin (whichever is higher, capped at 100%) for securities in ST-ASM Stage I.
- Apply a margin rate of 100% or existing margin (whichever is higher) for securities in ST-ASM Stage II.
Key dates
Document text
National Stock Exchange of India Limited
Circular
| Department: SURVEILLANCE | |
|---|---|
| Download Ref No: NSE/SURV/75610 | Date: August 06, 2026 |
| Circular Ref. No: 597/2026 |
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. August 10, 2026 on all open positions as on August 07, 2026 and new positions created from August 10, 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. August 10, 2026 on all open positions as on August 07, 2026 and new positions created from August 10, 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.
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
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Source details
- Source
- National Stock Exchange of India
- Type
- circular
- Published by source
- 06 Aug 2026
- Document number
- 597/2026
- Issuing division
- SURVEILLANCE
- Effective date
- 10 Aug 2026
- Coverage area
- securities