BSE has revised the circuit limits for shares of 549 companies, including Kingfisher Airlines, L&T Finance Holdings and Uttam Galva Steels, as part of a surveillance action.

The revised circuit limits ensure that the price of any scrip cannot move upward or downward beyond the limit set for the day. The revised limits would be effective from Wednesday .

The exchange has increased the circuit-filter limit for some stocks, and reduced it for some others.

In a separate circular, NSE has set 5 per cent circuit limit for 243 companies, 10 per cent for 134 firms and 20 per cent for a total of 1,039 companies. However, there is a no price band for 162 firms. — PTI