The National Stock Exchange of India Limited, on October 22, 2026, has announced a mock trading session in the Equity Derivatives (F&O) segment on Saturday, October 24, 2026. No new version release is planned for this session.
The Primary Site session will begin with the pre-open session at 11:00, with market order restrictions starting at 11:05 and random closure during the last two minutes before the 11:10 close. Normal market trading will run from 11:15 to 12:30, with a contingency session from 11:30 to 12:00. The DR Site session will begin with pre-open at 13:15, followed by normal market trading from 13:30 to 14:40 and a contingency session from 13:45 to 14:15. Stock and index futures price bands will be updated for alignment with the Call Auction Session (CAS) in the Equity Cash Market at 14:15. Trade modifications will close at 14:50, and live re-login will be available from 16:00 to 16:30. Members may download NEAT+ version 7.9.0 from /faoftp/faocommon/NEATPlus790.
Members using NNF must note that the existing encryption mechanism using old interactive port 10837 will be discontinued from December 7, 2026. They are advised to migrate to either the new encryption mechanism with MD5 checksum removal using port 10841 or the new encryption mechanism with immediate acknowledgement of order-related messages using port 10843. The gateway router IP is 172.19.13.85, the subnet is 172.19.13.0, the network mask is 255.255.255.128, and the existing port listed is 10820. Members should also follow the mock trading participation instructions and DR Site switchover guidelines provided in the circular’s annexures.
[Circular Ref. No. 144/2026]
