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.
BSE announces changes to the Short Term Additional Surveillance Measure (ST-ASM) framework with 12 securities being added, 5 securities moving out, and updated consolidated list effective February 04, 2026.
Impact
Medium
Severity
Medium
Justification
Affects trading surveillance measures for 17 securities across main board and SME segments, with operational impact on market participants trading these securities
BSE seeks clarifications from Lotus Chocolate Company Ltd and Bharat Rasayan Ltd regarding significant price/volume movements observed in their scrips.
Impact
Medium
Severity
Medium
Justification
Exchange surveillance action seeking clarifications on unusual trading activity; impacts specific companies and their investors pending response
BSE announces changes to Short Term ASM framework effective January 28, 2026, including securities being added, moved between stages, and removed from surveillance.
Impact
High
Severity
High
Justification
Direct impact on trading of multiple securities with enhanced surveillance measures; affects liquidity and trading conditions for listed companies
BSE updates on securities shortlisted, moved, and removed from Short Term 5/15/30 Days Additional Surveillance Measure framework effective January 28, 2026.
Impact
Medium
Severity
Medium
Justification
Surveillance measures affect trading dynamics and liquidity for specific securities. Medium impact as it involves multiple securities moving in/out of ST-ASM framework, affecting short-term trading activity and investor participation.
NSE introduces Short-Term Additional Surveillance Measure (ST-ASM) Stage I for Bharat Rasayan Limited and Dhampur Bio Organics Limited, implementing 50% margin requirement effective January 29, 2026.
Impact
Medium
Severity
Medium
Justification
Affects trading in two specific securities with enhanced margin requirements. Also removes three securities from ASM framework. Limited market-wide impact but significant for affected stocks.
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.