NSE announces 11 securities added to ST-ASM Stage I and 15 securities excluded from the ASM framework, effective April 23, 2026. No securities moved between Stage I and Stage II.
Impact
Medium
Severity
Medium
Justification
Routine ST-ASM update affecting 26 securities; 11 newly placed under enhanced surveillance (Stage I) and 15 removed from ASM framework. Trading in affected securities will face additional margin and monitoring requirements, impacting retail and institutional participants holding these stocks.
NSE adds 14 securities to Enhanced Surveillance Measure (ESM) Stage I effective April 23, 2026, requiring 100% margin and shifting marked securities from Rolling Settlement (EQ/SM) to Trade-for-Trade (BE/ST) segment from April 24, 2026.
Impact
High
Severity
High
Justification
14 securities are placed under ESM Stage I with mandatory 100% margin and segment migration to Trade-for-Trade, significantly restricting trading conditions and directly impacting traders and investors holding positions in these stocks.
NSE places 14 securities under ST-ASM Stage I and additional securities under ST-ASM Stage II effective April 21, 2026, with margin requirements of 50%-100% on open and new positions.
Impact
High
Severity
High
Justification
Directly imposes elevated margin requirements (50%-100%) on 14+ named securities effective April 21, 2026, significantly affecting trading costs and positions for market participants holding these stocks.
NSE announces the list of securities subject to the Reversal Trade Cancellation Mechanism (RTCM) for April 2026, covering 300+ stocks under enhanced surveillance.
Impact
High
Severity
High
Justification
RTCM is an NSE surveillance measure that directly cancels reversal trades in listed securities. Inclusion in this list significantly restricts trading patterns for 300+ stocks in the cash market segment for April 2026, with immediate and direct impact on trading activity and liquidity for affected securities.
NSE announces changes to the Long-Term ASM Framework effective March 09, 2026, including new additions, stage movements, and exclusions of securities.
Impact
Medium
Severity
Medium
Justification
Routine ASM framework update affecting a limited number of securities with stage changes and exclusions; impacts trading conditions for specific stocks but is a regular surveillance action.
NSE announces inclusion of Tera Software and Tree House Education in Long Term ASM Stage I, and movement of Sadhana Nitrochem from Stage I to Stage II, effective February 25, 2026, with 100% margin requirement from February 27, 2026.
Impact
High
Severity
High
Justification
Direct trading restrictions including 100% margin requirement and potential segment shift from EQ to BE series affect specific securities and their traders immediately.
NSE releases the updated list of 300+ securities subject to the Reversal Trade Cancellation Mechanism (RTCM) for March 2026, a surveillance measure to cancel trades that are reversed within a short timeframe.
Impact
Medium
Severity
Medium
Justification
Affects 300+ securities listed on NSE; RTCM is an active surveillance tool that can result in trade cancellations for reversal patterns, directly impacting traders and brokers dealing in these stocks. High importance due to the large number of securities covered; medium impact as it targets a specific trading behaviour rather than broad market restrictions.
NSE announces list of 323 securities subject to Reversal Trade Mechanism (RTCM) effective February 2026.
Impact
Medium
Severity
Medium
Justification
RTCM is a surveillance measure affecting 323 securities with enhanced monitoring and potential trading reversals to manage market risk and protect investors from abnormal price movements.
NSE implements Long Term ASM on select securities with 100% margin requirement effective January 1, 2026. Three securities added to Stage-I and one security moved from Stage-I to Stage-II.
Impact
High
Severity
High
Justification
100% margin requirement significantly impacts trading in affected securities. ESFL moved from Short Term to Long Term ASM framework indicating persistent surveillance concerns. Effective date is January 1, 2026.