The index-based market-wide circuit breaker system applies at 3 stages of the index movement, either way viz. at 10%, 15% and 20%. These circuit breakers when triggered bring about a coordinated trading halt in all equity and equity derivative markets nationwide. The market-wide circuit breakers are triggered by movement of either the BSE Sensex or the Nifty 50, whichever is breached earlier.
The market shall re-open, after index based market-wide circuit filter breach, with a pre-open call auction session. The extent of duration of the market halt and pre-open session is as given below:
Exchange shall compute the Index circuit breaker limits for 10%, 15% and 20% levels on a daily basis based on the previous day's closing level of the index rounded off to the nearest tick size.
Click here for daily market wide circuit filter.