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 announces changes to the Short-Term Additional Surveillance Measure (ST-ASM) framework effective May 06, 2026, including 8 new securities added to Stage I, 1 security moving from Stage I to Stage II, and 9 securities excluded from the ASM framework.
Impact
High
Severity
High
Justification
Directly affects trading conditions for 18 securities across multiple sectors; ST-ASM inclusion imposes additional margin requirements and trade restrictions, significantly impacting investor strategy and liquidity for the named 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 applies Short-Term Additional Surveillance Measure (ST-ASM) to 24 new securities under Stage I, moves CEDAAR to Stage II, and excludes 13 securities from the ASM framework, all effective April 24, 2026.
Impact
High
Severity
High
Justification
Directly affects trading conditions (margins, price bands, surveillance) for 38 securities across addition, escalation, and exclusion actions; traders and investors in these stocks must act before April 24, 2026.
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 inclusion of 5 securities under ST-ASM Stage I with 50% margin requirement effective February 04, 2026, and exclusion of 6 securities from ASM framework.
Impact
High
Severity
High
Justification
Significant margin increase to 50% for 5 securities including Sterlite Technologies and Mtar Technologies affects trading costs and liquidity. Immediate impact on market participants with positions in these securities.
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 imposes Short-Term Additional Surveillance Measure (ST-ASM) Stage I on 5 securities with increased margin requirements of 50% effective January 28, 2026.
Impact
High
Severity
High
Justification
Significant margin increase to 50% for 5 securities impacts trading costs and liquidity for affected stocks