NSE Circular Update: Pre-Open Session in F&O Segment

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NSE has announced the introduction of a Pre-Open Session for index and stock futures in the Equity Derivatives segment, effective from December 8, 2025. This step follows SEBI’s guidelines aimed at improving trading convenience and strengthening risk monitoring.

  1. Introduction of Pre-Open Session
  • NSE will introduce a Pre-Open Session for Index & Stock Futures in the Equity Derivatives segment.
  • Effective from December 8, 2025.
  1. Testing Timeline
  • Changes will be available for testing in the test market from October 4, 2025.
  • Mock sessions will be conducted before the official launch.
  1. Further Details
  • Additional operational modalities related to the implementation will be published through a separate circular.

Why This Matters

  • The move is in line with SEBI’s directive to enhance trading convenience and strengthen risk monitoring.
  • Traders should prepare for system updates and participate in mock sessions to ensure a smooth transition.
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I’m not sure what kind of Pandora’s box they’re opening this time.

For years, the knowledge was that derivatives couldn’t operate during the pre‑open session because the underlying asset price wasn’t known.

But financial concepts are never static—they evolve as situations demand.

For example, there was a time when money could only be issued with gold or asset backing (the Gold Standard). But when that system became unsustainable, a new idea emerged: Quantitative Easing, where central banks could pump liquidity by printing money without any physical gold reserves.