Bengaluru, Sept. 23 -- Short-term Additional Surveillance Measure (ST ASM) is a framework by SEBI and stock exchanges to track stocks with unusual trading activity. It imposes temporary, stricter trading rules on highly volatile or speculative stocks to safeguard investors and ensure market stability.

ST- ASM (Additional Surveillance Measure) Stage 1 When a stock enters Stage 1 of the ST-ASM framework, margin requirements rise sharply, ranging from 50% to 100% depending on volatility. In this stage, intraday leveraged trading is banned, and only CNC (Cash and Carry) delivery trades are allowed, requiring full upfront payment.

Stocks under Stage 1 are reviewed weekly and may exit the list after 5-15 trading days if conditions improve. Tr...