NSE introduces Short-Term Additional Surveillance Measure (ST-ASM) Stage I for 6 securities with 50% margin requirement effective January 5, 2026, while excluding 3 securities from ASM framework.
Impact
High
Severity
High
Justification
High margin requirements (50-100%) significantly impact trading in affected securities, with immediate compliance required for market participants
NSE places securities under Short-Term Additional Surveillance Measure with increased margin requirements of 50% or existing margin (whichever is higher) effective December 26, 2025.
Impact
High
Severity
Medium
Justification
Increased margin requirements significantly impact traders holding positions in affected securities; affects multiple stocks with staged surveillance implementation
NSE announces securities entering and exiting the Short-Term Additional Surveillance Measure (ST-ASM) framework effective December 17, 2025, impacting 26 securities across various stages.
Impact
High
Severity
High
Justification
ST-ASM framework directly impacts trading conditions for 30 securities with 6 additions to Stage-I and 4 exclusions, affecting investor accessibility and liquidity
NSE has placed three securities under Short-Term ASM Stage I with increased margin requirements of 50% or existing margin (whichever is higher, capped at 100%) effective December 17, 2025.
Impact
High
Severity
Medium
Justification
Affects three securities with significantly increased margin requirements (50% minimum), directly impacting trading positions and liquidity. High impact for traders holding these stocks, but limited to specific securities.
List of securities subject to Reversal Trade Cancellation Mechanism (RTCM) for December 2025, covering over 300 stocks where specific trade cancellation procedures will apply.
Impact
Medium
Severity
Medium
Justification
Affects trading operations for over 300 securities with specific trade cancellation procedures. Important for traders and market participants dealing with these stocks to understand RTCM applicability.