Sebi said it was closely monitoring the situation at the NSE following the disruption of trading due to technical issues.
According to brokers and those trading on the NSE, stock prices did not get updated and there was also an issue in accessing the F&O segment.
NSE said that it has issued notice to traders on its BOLT platform and said that its cash platform will see normal trading from 11.15 am.
NSE had faced a similar technical glitch in May in the F&O segment where numerous traders were unable to exit their intra-day trading positions following an erroneous order cancellation request.
A technical glitch disrupted operations at India's biggest stock exchange. The 50-share NSE Nifty also rose by 105.25 points, or 1.09 per cent, to 9,771.05, its record closing high, breaching its previous record high of 9,675.10 recorded on June 5. "A mixed trend at other Asian bourses following a rally on Wall Street on Friday on the back of forecast-busting United States jobs data cheered investors here", the report said.
"NSE cash market segment did not function normally due to technical problem at the opening today and accordingly was closed.", said the exchange in a statement.
On BSE, 1,540 stocks advanced, while 1,112 declined and 157 remained unchanged.
Amid concerns raised in certain quarters on why trading activities were not shifted to the back-up system, the NSE said that shifting would have taken longer.
However, a technical problem at the NSE created problems during the day. The matter has also been referred to the Standing Committee on Technology to review the problem and approve measures to prevent recurrence of such glitches.