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News Topical, Digital Desk : Bombay Stock Exchange (BSE) has implemented Circuit Filter (Revised Price Band) on the shares of 65 companies from 15 September 2025. The move is aimed at curbing abnormal trading activity and protecting investors from potential risks. Stocks which suddenly witness sharp fluctuations in volume or price are identified by BSE under its regular surveillance mechanism and then takes necessary action. In this episode, the price band of many stocks has been reduced to 2 percent, 5 percent and 10 percent.
BSE's surveillance measures include lowering circuit filters, putting a stock in the trade-to-trade segment, imposing special margins and suspending the stock or member if required. BSE sets a price band for each stock to prevent the stock price from rising or falling too suddenly. If a stock shows abnormal volatility, a tighter band is imposed on it.
Why is Special Margin imposed? Special margin is imposed when an abnormal increase is seen in the price or trading volume of a stock. In this situation, BSE can impose special margin of 25%, 50% or 75%. Its purpose is to protect investors from heavy losses due to rumors or speculation. The main objective of such surveillance action is to maintain transparency in the stock market, prevent any kind of manipulation in stock price and protect the interests of investors
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