What is the difference between ASM and GSM?

In the stock market, ASM (Additional Surveillance Measure) monitors stocks showing unusual trading activity or high volatility. GSM (Graded Surveillance Measure), on the other hand, identifies and manages potentially risky stocks—particularly those with weak financials or susceptibility to price manipulation. GSM uses a tiered system that applies increasingly strict trading restrictions based on a stock's behavior. In simple terms, ASM focuses on controlling volatility, while GSM protects investors from risky stocks through close, graduated monitoring.