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 places four securities under ST-ASM Stage I with increased margin requirements of 50% effective December 11, 2025, while removing two securities from the ASM framework.
Impact
High
Severity
High
Justification
Significant increase in margin requirements to 50% for four securities affects trading costs and liquidity. Direct impact on traders holding positions in these stocks.
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.
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.