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 places 51 securities under Short-Term ASM Framework Stage-I effective April 27, 2026, with no securities added to Stage-II and no movement between stages.
Impact
High
Severity
Medium
Justification
51 securities placed under Short-Term ASM Stage-I affecting a broad set of listed companies with enhanced surveillance and potential trading restrictions from April 27, 2026.
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 includes 15 securities under ST-ASM Stage I effective April 16, 2026, with enhanced margin requirements of 50% or existing margin (whichever is higher, max 100%) applicable from April 17, 2026. No securities added to Stage II.
Impact
High
Severity
High
Justification
Directly affects trading conditions for 15 securities by imposing enhanced margin requirements of up to 100%, significantly impacting traders holding or planning positions in these stocks from April 17, 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.
BSE updates list of securities moving into, within, and out of Short Term ASM framework with revised surveillance stages effective February 5, 2026.
Impact
Medium
Severity
Medium
Justification
Regular surveillance update affecting 23+ securities with trading restrictions; impacts liquidity and price discovery for listed companies under enhanced monitoring
BSE announces changes to securities under Short Term Additional Surveillance Measure framework, with 7 securities being added, 1 security moving to lower stage, and 8 securities exiting the framework effective February 05, 2026.
Impact
Medium
Severity
Medium
Justification
Routine surveillance framework update affecting 16 securities. Important for traders and investors in affected stocks as it indicates heightened monitoring and potential trading restrictions.
NSE implements Short-Term Additional Surveillance Measure (ST-ASM) on select securities with enhanced margin requirements of 50% or existing margin (whichever is higher) effective February 6, 2026.
Impact
High
Severity
High
Justification
Significantly increases margin requirements to 50% minimum on affected securities, directly impacting trading costs and leverage for market participants. Affects multiple stocks with stage transitions and exclusions.
BSE announces changes to securities under Short Term Additional Surveillance Measure framework, including new additions, stage movements, and removals effective January 29, 2026.
Impact
Medium
Severity
Medium
Justification
Affects trading in multiple securities through surveillance framework changes, impacting liquidity and trading activity for listed companies