New SEBI F&O Rules 2026 — What Changes for Retail
TL;DR
SEBI's latest F&O rule changes raise margin requirements on certain contracts and adjust lot sizes, strike intervals, and expiry cadence on some of the most actively traded index contracts. Neither change alters the underlying math of options or futures — they raise the capital required to take the same risk retail traders were taking before.
SEBI has periodically tightened F&O market structure over the past few years, largely in response to its own research showing how consistently retail traders lose money in derivatives. The latest round of changes continues that direction.
Margin requirements are one of the most direct impacts for retail traders — higher upfront margin on certain contracts changes position sizing math immediately, since the same capital now supports a smaller notional exposure than before.
Contract specifications (lot sizes, strike intervals, expiry cadence) have also seen adjustments on some of the most actively traded index contracts, which changes the practical entry cost for a single lot.
None of these changes alter the underlying math of options and futures — they mostly raise the bar for how much capital is needed to take the same risk retail traders were taking before, which is broadly consistent with SEBI's stated goal of reducing speculative retail losses.
What are the main changes in SEBI's latest F&O rules?
Higher margin requirements on certain contracts, plus adjustments to lot sizes, strike intervals, and expiry cadence on some actively traded index contracts.
Why is SEBI tightening F&O rules?
In response to its own research showing how consistently retail traders lose money trading derivatives.
How do higher margins affect position sizing?
The same trading capital now supports smaller notional exposure per lot, so position sizing rules built around lot count need to be recalculated.
Do these changes affect the underlying math of options and futures?
No — they raise the capital required to take the same risk, they don't change how options or futures pricing and mechanics work.
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