NSE introduces Short-Term Additional Surveillance Measure (ST-ASM) Stage I for four securities with increased margin requirements of 50% or existing margin (whichever is higher) effective November 11, 2025.
Impact
Medium
Severity
Medium
Justification
Impacts specific securities with increased margin requirements which affects trading liquidity and costs for market participants holding positions in these stocks
NSE circular announcing securities subject to Short-Term Additional Surveillance Measure (ST-ASM) framework effective October 31, 2025, including one new addition and two exclusions.
Impact
Medium
Severity
Medium
Justification
Affects trading conditions for 29 securities under ASM framework with one new addition (UTSSAV) to Stage I and two exclusions (BANCOINDIA, V2RETAIL). Medium impact as it applies enhanced surveillance measures to specific securities.
NSE circular listing 324 securities subject to Reversal Trade Cancellation Mechanism (RTCM) for November 2025, a surveillance measure to prevent price manipulation.
Impact
High
Severity
Medium
Justification
RTCM is a critical surveillance mechanism affecting 324 securities, enabling NSE to cancel erroneous or manipulative trades. High impact on trading operations and investor protection, though routine monthly update.