The Indian Stock Market leading Indices Sensex and Nifty suspended the trading for 45 minutes since, both the Indices touched over 10% lower freeze level, as per the circuit breaker any move beyond 10% either upper or lower, the trading will be suspended for 45 minutes, if the upper/lower freeze level happens before 1:00 pm. 

Nifty Index started the trade with big gap down and touched the lower freeze level by 9.20 am, the lower freeze halted the trading and market closed till 10.05 am, the pre-open market resume by 10.05 am and closes by 10.12 am for fair price discovery mechanism, then the normal trading will resume by 10.20 am. 

To know/read more about upper or lower circuit breaker norms for Nifty, please click the following link: https://www1.nseindia.com/products/content/equities/equities/circuit_breakers.htm