The technical problem on individual stocks affected traders from the start of Monday's session, preventing them from placing trades, multiple dealers said.
The exchange's stock indexes updated when trading opened but also stopped soon after. Futures and options began trading normally initially, but the NSE has stopped providing quotes, the dealers said.
In its latest update NSE said: "Due to technical reasons in cash market the opening of market (Cash and F&O segment) has been further delayed. Market re-open time will be intimated."