Bengaluru, April 29 -- The Short-term Additional Surveillance Measure (ST-ASM) is a regulatory mechanism introduced by SEBI and Indian stock exchanges to closely monitor stocks that exhibit unusual or sudden trading activity. Its primary goal is to safeguard investors and uphold market stability by applying temporary, tighter trading restrictions on highly volatile or speculative stocks.

Criteria for Inclusion & Exclusion in ST-ASM

Stocks are placed under the Short-term Additional Surveillance Measure (ST-ASM) based on sudden abnormal price movements, sharp volume changes, high client concentration, limited trader diversity, and short-term volatility (typically over 5-15 trading days). These factors help exchanges identify stocks with u...