Description
BSE places securities under ST-ASM Stage I (50% margin) and Stage II (100% margin) effective May 21, 2026, as part of its ongoing market surveillance framework.
Summary
BSE has placed certain securities under the Short Term Additional Surveillance Measure (ST-ASM) framework under Stage I and Stage II classifications, effective May 21, 2026. Securities under Stage I will attract a minimum 50% margin rate, while those under Stage II will attract a 100% margin rate. This action is part of BSE’s ongoing market surveillance and does not constitute an adverse action against the listed companies.
Key Points
- Securities listed in Annexure I have satisfied criteria for inclusion under ST-ASM Stage I with a minimum applicable margin of 50% (capped at 100%).
- Separate securities in Annexure I have also satisfied criteria for ST-ASM Stage II with a mandatory margin rate of 100%.
- Margin requirements apply to all open positions as on May 20, 2026, and all new positions created from May 21, 2026.
- ST-ASM is applied in conjunction with all other prevailing surveillance measures.
- Shortlisting under ASM is purely a surveillance action and should not be construed as an adverse finding against the company.
- Price bands will be reinstated to pre-ASM levels upon exit, unless the scrip remains under another surveillance measure.
Regulatory Changes
This notice is issued further to prior ASM framework revisions notified via Exchange notices:
- 20240920-71 (September 20, 2024)
- 20181027-1 (October 27, 2018)
- 20190719-33 (July 19, 2019)
- 20201204-56 (December 4, 2020)
- 20230925-49 (September 25, 2023)
- 20240920-63 (September 20, 2024)
No new framework changes are introduced; this notice applies the existing ASM framework to newly shortlisted securities.
Compliance Requirements
- Trading Members: Must ensure that applicable margins (50% for Stage I, 100% for Stage II, subject to the 100% cap) are collected on all open positions as of May 20, 2026, and on new positions from May 21, 2026.
- Market Participants: Must note that ASM operates alongside other surveillance measures; both sets of requirements must be complied with simultaneously.
- For clarifications, members may contact BSE Surveillance at bse.surv@bseindia.com.
Important Dates
| Date | Event |
|---|---|
| May 19, 2026 | Notice issued; securities shortlisted under ST-ASM |
| May 20, 2026 | Reference date for open positions subject to new margin requirements |
| May 21, 2026 | Revised margin rates become effective for open and new positions |
Impact Assessment
Traders holding positions in the shortlisted securities will face significantly higher margin requirements — up to 100% of the position value — effective May 21, 2026. This can force position reductions or additional capital infusion, reducing liquidity in the affected scrips. Stage II securities (100% margin) are particularly impacted, as the full position value must be covered as margin. Retail and leveraged participants are most exposed. The measure is intended to curb speculative activity in securities exhibiting abnormal price/volume behavior, and does not signal any fundamental issue with the underlying companies.
Impact Justification
Mandatory margin increases up to 100% on affected securities affect all open and new positions from May 21, 2026, directly impacting traders' capital requirements and liquidity.