BSE has revised circuit limits for shares of 463 companies, including United Breweries Holdings, Reliance MediaWorks, Kingfisher Airlines and D. B. Realty, as part of surveillance action.

The revised circuit limits, which ensures that the price of a scrip cannot move upward or downward beyond a limit set for the day, is effective from Friday.

The exchange has increased the circuit limit for some stocks, while it has been reduced for others.

BSE has raised the circuit limit for 409 scrips, including UBHL, Reliance MediaWorks, Kingfisher Airlines, Essar Oil, UB Engineering, MMTC and Venus Remedies to 10 per cent from 5 per cent.

Besides, it has increased circuit-filter level for companies such as Zuari Global, Kesoram Industries, Hindustan Copper, National Fertilizers to 20 per cent from 10 per cent.

For as many as 78 scrips, the circuit limit has been upped from 2 per cent to 5 per cent, which includes Lifeline Drugs & Pharma, Mahindra Composites, Venus Power Ventures (India).

The exchange has, however, lowered the circuit filter for a total of 64 companies. BSE has narrowed the limit for 28 companies to 5 per cent from 20 per cent, reduced the filter for 16 firms from 20 per cent to 10 per cent.

In a separate circular, NSE has set 5 per cent circuit limit for 394 companies, 10 per cent for 146 firms and 20 per cent for a total of 895 companies. However, there is no price band for 147 companies.