F&O Lot Sizes.
Current contract lot sizes for every Indian index option and future — the building block for position sizing, margin estimation, and premium calculations.
All contracts cash-settled · live values, sourced from the same feed our autotrade engine trades with
| Index | Exchange | Lot Size | Expiry Cycle |
|---|---|---|---|
| NIFTY 50 | NSE | 65 | Weekly (Thu) & Monthly |
| BANK NIFTY | NSE | 30 | Monthly only |
| FINNIFTY | NSE | 60 | Monthly only |
| MIDCAP NIFTY | NSE | 120 | Monthly only |
| SENSEX | BSE | 20 | Weekly (Tue) & Monthly |
Note: BANKEX (BSE Bankex monthly contracts) is not currently in our actively-tracked set, so it isn't shown above. NSE/BSE publish the authoritative lot size for every contract on their respective F&O contract specification pages.
How lot size affects your trade
- Contract value = Lot Size × Premium (for options) or × Spot (for futures notional). A NIFTY option at ₹150 premium with a 65 lot size has a per-lot outlay of ₹9,750.
- P&L per point — every 1-point move in the underlying changes your position's value by Lot Size × Number of Lots. A 1-lot NIFTY position moves ₹65 per index point; a 1-lot Midcap Nifty position moves ₹120 per point.
- Margin requirements — span + exposure margins for futures (and short option positions) are calculated on the full contract notional, which scales directly with lot size.
- Why lot sizes differ — exchanges set lot size so that one contract's notional value sits within a defined band regardless of the index's absolute price level. A higher-priced index (like SENSEX) gets a smaller lot size; a lower-priced one (like Midcap Nifty) gets a larger one.
Related reading
F&O Expiry Calendar →
Weekly and monthly expiry dates for all six Indian index contracts.
Index vs Stock Options →
How lot sizes, settlement and liquidity differ between index and stock F&O.
Option Expiry Mechanics →
What changes in the final session — gamma, pin risk, settlement price.
Sizing live positions across these contracts? Login to the terminal →