Higher margin near expiry

F&O positions face higher margin in the days leading to expiry, particularly for stock F&O contracts which require physical settlement. This layered margin increase reflects the rising settlement risk as expiry approaches.

For index F&O (cash-settled)

Index futures and options (Nifty, BankNifty, FinNifty, MidcapNifty, Sensex) cash-settle at expiry. The margin increase is modest:

• Slightly higher SPAN due to time-decay scenarios.
• Possible additional margin layer 1-2 days before expiry.
• Reverts to normal once new contracts list.

For most index F&O traders, the near-expiry margin increase is manageable.

For stock F&O (physical settlement)

Stock options and futures require physical settlement at expiry. The margin escalation is substantial:

For an ITM stock option position held to expiry, the user effectively must hold the full notional value as margin during the last day.

See Delivery margin field on Kite for details.

Practical implications

For stock F&O positions:

• Plan exit before pre-expiry margin escalation. Most retail traders close 3-4 days before expiry.
• Roll over to next-month contracts if you want to maintain exposure.
• Take delivery if intentional. Ensure cash for ITM call assignment (full notional).

For index F&O positions: the near-expiry margin is more manageable, but still consider:

• Possible additional margin during volatile expiry sessions.
• Settlement-week dynamics affecting strategy.

Rationale

The pre-expiry margin layer addresses:

• Physical settlement risk (stock options): broker / clearing corp risk that the user can’t deliver.
• Liquidity drop approaching expiry.
• Pin risk (option strikes near underlying close).
• Operational settlement risk.

Settlement specifics for stock options

If an ITM stock option expires:

• Long ITM call: Buy underlying shares at strike (cash debit; physical delivery).
• Long ITM put: Sell underlying shares at strike (you must own them, or short-cover).
• Short ITM call: Deliver underlying shares (you need them in demat).
• Short ITM put: Buy underlying shares at strike (cash debit).

The pre-expiry margin ensures the trader has the cash / shares for settlement.

Avoid the spike

For most retail stock F&O traders, the optimal strategy is to:

• Close the position 4+ days before expiry.
• Roll over to next-month contract for continued exposure.
• Avoid letting positions expire ITM (especially for shorts).

See also

• Delivery margin field on Kite
• Long-dated contracts margin requirements
• Additional margin for selling index options
• Naked option selling margin on Zerodha
• Hedged positions margin benefit on Zerodha
• SPAN margin on Zerodha
• Exposure margin on Zerodha
• Margins and leverage at Zerodha
• Margin required on order window
• Margin available / used / cash on Kite funds
• Margin on exit calculation
• Margin shortfall and auto-square-off
• Settlement (F&O)
• NSE derivatives expiry calendar
• Derivative lot size on NSE
• Lot size revision F&O 2024
• Weekly expiry contraction November 2024
• Stock derivatives (India)
• Physical settlement (stock F&O India)
• How to add F&O contracts to the marketwatch
• How to add Nifty / BankNifty options to the marketwatch
• Zerodha margin calculator
• 50:50 cash collateral rule explained
• SEBI peak margin rules explained
• Kite Positions tab explained
• Auto square-off on Zerodha
• Futures and options
• Zerodha
• Kite (Zerodha)

External references

• NSE Clearing pre-expiry margin
• Zerodha margin policies
• SEBI physical settlement

References

1. NSE Clearing, Pre-expiry margin framework, nseclearing.com.
2. SEBI, Physical settlement framework, circular dated 11 April 2018.
3. Zerodha, Pre-expiry margin for stock F&O, zerodha.com.