The measures, introduced recently, are aimed at alerting market participants to be "extra-cautious and diligent" in dealing with certain securities.
Coming out with a detailed set of frequently asked questions (FAQs) on the measures today, BSE said the trading member has to collect the additional surveillance deposit (ASD) for all applicable transactions.
"The ASD is charged to the buyer of the transaction. It is not charged to the seller. The buyer shall be charged even if he enters into another sell transaction in the said security," the exchange said.
It has to be paid in cash only, BSE said.
"ASD shall not be refunded or adjusted even if securities purchased are sold off at the later stage within a quarter. ASD shall be retained till review of the GSM (graded surveillance measures) stages i.E. Quarterly review," it added.
In the first stage of GSM, the particular scrip will be transferred to the trade for trade segment with an applicable price band of 5 per cent or lower.
The GSM will be in place for securities that see an abnormal price rise, which is not commensurate with financial health and fundamentals such as earnings and book value.
"The underlying principle behind defining various stages under GSM framework is to alert the market participants that they need to be extra cautious and diligent while dealing in such securities as the need has been felt to place them under higher level of surveillance," the BSE said.
These measures will be implemented in a coordinated manner across the stock exchanges where the securities concerned are listed.
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