NSE notifies inclusion and movement of securities under Enhanced Surveillance Measure (ESM) framework effective May 18-19, 2026, with mandatory 100% margin and shift to Trade-for-Trade segment.
Impact
High
Severity
High
Justification
Directly affects trading conditions for multiple securities with mandatory 100% margin requirement and segment shifts from Rolling Settlement to Trade-for-Trade, materially impacting liquidity and trading costs for affected stocks.
NSE Surveillance has decided to shift 20 securities from Rolling segment (EQ/SM) to Trade for Trade segment (BE/ST) with a 5% price band effective May 19, 2026, as part of ongoing market safety review.
Impact
High
Severity
High
Justification
Directly affects trading and settlement methodology for 20 listed securities; no netting off allowed in T2T segment significantly impacts intraday traders and liquidity for the affected scrips effective May 19, 2026.
NSE adds 9 securities to ST-ASM Stage I effective May 08, 2026, with enhanced margin requirements of 50% or existing margin (whichever higher) applicable from May 11, 2026. No securities added to Stage II.
Impact
High
Severity
High
Justification
9 securities face mandatory enhanced margin requirements (50%-100%) affecting open and new positions from May 11, 2026, directly impacting traders holding or planning positions in these stocks.
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.