What surveillance actions apply to stocks under ASM?

Some of the key surveillance actions on stocks under ASM include increased margin requirements, trade-to-trade settlement (which requires delivery for all trades and eliminates intraday trading and BTST), restrictions on intraday trading, limited collateral value, and daily price band limits to curb volatility and market manipulation.

Depending on the severity of abnormal trading behaviour—such as excessive price or volume fluctuations—and with the objective of protecting investors and maintaining market integrity, these measures are implemented in stages ranging from Stage 1 to Stage 3.