Description

NSE will conduct a mock trading session in the Futures & Options segment on Saturday, April 18, 2026, using NEATPlus 7.8.7. No new version release; members must re-login to live environment post-session.

Summary

NSE will conduct a mock trading session in the Futures & Options (F&O) segment on Saturday, April 18, 2026, from the Primary Site. The session is in reference to circular NSE/FAOP/72763 dated February 12, 2026 on new encryption mechanisms for interactive messages and immediate order acknowledgement. No new version release is associated with this mock session. NEATPlus version 7.8.7 is applicable.

Key Points

  • Mock trading session scheduled for Saturday, April 18, 2026 in the F&O segment
  • No new software version release accompanying this mock session
  • Applicable NEAT+ version: 7.8.7 (download path: /faoftp/faocommon/NEATPlus787)
  • Members must use the correct NEAT Adapter version and GR port combination:
    • Old NEAT Adapter (v1.0.20): GR Port 10827
    • New NEAT Adapter (v1.0.27): GR Port 10833
  • Trades during mock sessions carry no financial obligation (no fund pay-in or pay-out)
  • NOTIS application will be accessible during the mock session
  • Live re-login required post-session to ensure smooth Monday, April 20, 2026 trading connectivity

Regulatory Changes

No regulatory changes introduced in this circular. Session is in continuation of the earlier circular NSE/FAOP/72763 (February 12, 2026) regarding new encryption mechanisms for interactive messages and immediate order acknowledgement.

Compliance Requirements

  • Members must participate using all trading software during the mock session
  • Members must re-login to the live environment after the mock session to confirm connectivity for Monday trading
  • Only UCC/PAN uploaded and approved before the cutoff will be allowed; UCC validation skipped during contingency order entry
  • Members using NNF software must manually clear orders in their own systems (all outstanding orders are cleared by the exchange before each session)
  • For software testing compliance, members may use either Mock Trading or the Simulated Environment per SEBI circular SEBI/HO/MRD1/DSAP/CIR/P/2020/234 and NSE/MSD/46441

Important Dates

  • April 18, 2026 (Saturday): Mock trading session
    • Pre-Open Open: 11:00 hrs
    • Pre-Open Close: 11:08 hrs (random closure in last one minute)
    • Normal Market Open: 11:15 hrs
    • Normal Market Close: 13:00 hrs
    • Trade Modification End: 13:10 hrs
    • Live Re-login Start: 16:00 hrs
    • Live Re-login Close: 16:30 hrs
  • April 20, 2026 (Monday): Live trading resumes; connectivity must be verified via re-login on April 18

Impact Assessment

This is a routine operational mock session with low market impact. No financial settlements occur. Member firms in the F&O segment need to ensure their NEAT Adapter versions and port configurations are correct before participating. The session is primarily aimed at testing connectivity following the new encryption mechanism introduced for interactive messages. Members who do not participate risk connectivity issues on the following Monday’s live trading session.

Impact Justification

Routine mock trading session for F&O segment; no financial obligations, no regulatory changes, no new version release. Operational relevance limited to member firms testing connectivity.