NSE circular announcing securities being added to, moved within, or removed from the Long-Term Additional Surveillance Measure (LTASM) framework effective May 11, 2026.
Impact
High
Severity
High
Justification
Directly affects trading conditions for 13 securities including settlement mechanism changes, circuit breaker tightening, and margin requirements under ASM framework.
NSE announces 11 securities added to ST-ASM Stage I and 5 securities excluded from the ASM framework effective May 11, 2026, including movements to LTASM and ESM frameworks.
Impact
Medium
Severity
Medium
Justification
ST-ASM placements impose additional surveillance and trading restrictions on specific securities, directly affecting their market liquidity and investor behaviour. 11 new stocks enter Stage I and 5 are excluded, with some transitioning to stricter LTASM/ESM frameworks.
NSE shortlists 8 securities under ST-ASM Stage I effective May 4, 2026, with enhanced margin requirements of 50% or higher applicable from May 5, 2026. No securities added to Stage II.
Impact
High
Severity
High
Justification
Directly affects trading in 8 specific securities with mandatory margin hikes of up to 100%, impacting traders holding or creating positions from May 5, 2026.
NSE Surveillance circular updating the list of symbols subject to the Reversal Trade Cancellation Mechanism (RTCM) for May 2026, covering series EQ, BE, BZ, SM, ST & SZ across approximately 175 designated securities.
Impact
Medium
Severity
Medium
Justification
Routine monthly update to the RTCM symbol list for May 2026 affecting ~175 smaller/mid-cap securities; important for trading members handling these stocks but limited broader market impact since Nifty 500 and NSE Clearing-approved securities are excluded.
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 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 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.