SURVEILLANCE AT BSE: A Stock Exchange not only promotes trading of securities but also monitor the price and volume movement of securities. The monitoring process is known as surveillance.
The main objective of the Surveillance function of the Exchange is to promote market integrity in two ways:
■ By monitoring price and volume movements;
■ By detecting potential market abuses.
Price monitoring is mainly related to abnormal movement of price of particular scrips in the Stock Exchange. Volume monitoring relates to abnormal positions of a member (Broker) i. e. purchase of abnormal quantity by a broker.
OBJECTS
■ Stock Exchange is to monitor price and volume movement as well as also detecting potential market abuse.
■ To control market abuse.
■ To manage default risk by taking necessary action.
In short, surveillance means detection of the possible market abuse in respect of price movement/abnormal fluctuation in prices or volumes.
ON – LINE SURVEILLANCE: Online surveillance system has facility to generate the alerts on – line, in real time, based on certain preset parameters like price & volume variations in scrips, members taking unduly large positions not commensurate with their financial position in one or two scrips. It alerts immediately to the officials of Stock Exchange about the abnormal behavior of members.
OFF – LINE SURVEILLANCE: The Off – Line Surveillance system is based on various reports like High/Low Difference in prices, Percentage change in prices over a week/fortnight/month, trading in infrequently traded scrips and scrips hitting New High/Low.
DERIVATIVE MARKET SURVEILLANCE: Under this category, the focus areas are like abnormal fluctuation in the prices of a Series, Market Movement (Cash vis – a – vis Derivative), Member Concentration (Cash vis – a – vis Derivative) and Closing Price Manipulation (Cash & Derivative).
INVESTIGATION: The Exchange conducts in – depth investigations based on preliminary enquiries/analysis made into trading of the scrip and also at the instance of SEBI.
SURVEILLANCE ACTION:
■ SPECIAL MARGINS: Special margin may be imposed by BSE from time to time on certain Securities as a surveillance measure and informed to the Members through notices. Special margins are imposed on stocks which witness abnormal movement in price or volume. It is a surveillance measure intended to check speculative activity in particular scrip. At the BSE, the margin is levied at 25% or 50%. This largely depends on the sharpness in the movement of share price or volumes, client wise net outstanding purchase or sale position or on both sides.
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