Mumbai: The Bombay Stock Exchange (BSE) has announced new weekly trading surveillance measures on nine stocks, including RRP Semiconductors, in a bid to curb excessive volatility following unusual price movements.

Effective November 10, 2025, the new rules will apply to companies exclusively listed on the BSE that meet specific criteria, trading above ₹100, carrying a 2 per cent price band, possessing a price-to-earnings (P/E) ratio above 500 or negative, and having hit the upper price band for two consecutive weeks, the exchange said in a statement.

“In continuation of our endeavour to maintain market integrity and curb excessive price movement in securities listed exclusively on the BSE trading platform, a need has been felt to further strengthen the extant surveillance measures,” the BSE noted.

The nine stocks identified under the new framework are Citizen Infoline, Colab Platforms, Dugar Housing Developments, EMA India, Mardia Samyoung Capillary Tubes Company, Omansh Enterprises, Oswal Overseas, RRP Defence, and RRP Semiconductor.

Under this measure, affected securities will be permitted to trade only once a week, either on Monday or the first trading day of the week, within a 1 per cent price band. The exchange will identify qualifying stocks every Friday (or the last trading day of the week) and conduct quarterly reviews to determine eligibility for removal from the framework, with a minimum one-month retention period.

The BSE clarified that the framework will operate alongside existing surveillance mechanisms already in force. It also emphasised that the shortlisting of securities is purely a market surveillance measure and “ should not be construed as an adverse action against the concerned company.”

IANS