The National Stock Exchange of India Limited (NSE) on August 27, 2026, has scheduled a mock trading session in the Capital Market Segment on August 29, 2026, to test modifications to the pre-open call auction framework and changes relating to Base Price, Price Bands, Call Auction, and Close-out procedures for Exchange Traded Funds (ETFs).
The following has been stated:
Three trading sessions will be conducted. Session 1, from the DR Site, will test the modified pre-open call auction framework using NEATPlus version 7.9.0. After Session 1, members must reinstall and use NEATPlus version 7.8.8 or 7.8.9 for Sessions 2 and 3, which will follow the existing trading modalities.
The mock will include pre-open, special pre-open, normal market, T+0, auction, block deal, Call Auction and Closing Session timings across the three sessions. Members are requested to actively participate in all sessions. Trades from Session 1 will not be available in Sessions 2 and 3, whereas trades from Session 2 will be available in Session 3.
Members must also use the specified master files and NEATPlus versions applicable to each session. NEATPlus 7.8.8 will be discontinued after the mock on September 5, 2026, while version 7.9.0 will be applicable to Session 1. Detailed guidelines and prerequisites for participation, including instructions for switchover to the Disaster Recovery Site, are provided in the annexures.
Please refer to the document attached below for more details.
[Circular No.: 119/2026]
