NSE & BSE F&O Lot Sizes 2026: Index and Stock Contracts, Upcoming Revisions and Contract Values

A lot is the fixed number of units in one futures or options contract. You can't trade half a lot, so the lot size sets the smallest position you can take, and with it how many rupees each point of movement is worth. Every table on this page is built from the exchange contract master, last updated 01 Nov 2026.

Index derivatives

Only one index per exchange keeps weekly options: NIFTY on NSE and SENSEX on BSE. Everything else is monthly. The weekly expiry guide explains why, and the expiry calendar lists the dates.

Lot revisions already listed

35 stocks already have a later series listed with a different lot size. Until the current series expires, both lot sizes trade side by side: the old one in the near month and the new one from the series shown.

How lot sizes are set

Lot sizes exist to keep each contract within a target value range. Under SEBI's October 2024 measures, index derivative contracts must be worth at least ₹15 lakh when they are introduced, and exchanges review lot sizes periodically against the underlying's price. Stock derivatives are reviewed the same way against each stock's price.

• When the underlying rises a lot, the contract becomes too large and the lot size is cut.
• When it falls, the contract becomes too small and the lot size can be raised.
• The change applies from a series named in the exchange circular. Contracts already trading usually keep their old lot size until they expire, which is why two lot sizes can coexist.

From lots to rupees

contract value   = price × lot size
₹ per point      = lot size × number of lots
risk per lot     = |entry − invalidation| × lot size

NIFTY future at 25,000, lot 65:   contract value = ₹16,25,000;  ₹65 per index point
stock at ₹1,400, lot 500:          contract value = ₹7,00,000;   ₹500 per ₹1 move

The position size calculator does this for any instrument, and the expiry-day ELM calculator adds the extra margin on short index options on expiry day.

Margin isn't contract value

You don't pay the full contract value to hold a futures position or a short option. You post margin: SPAN margin (the worst likely one-day loss, computed by the exchange) plus exposure margin, plus anything extra your broker adds. Margin is usually a fraction of contract value and changes daily with volatility. Long options are different: you pay the full premium upfront. For a short-option position, margin can rise sharply on expiry day because of the additional Extreme Loss Margin.

Stock F&O lot sizes: all 218 stocks

Every stock with NSE futures. Where a revision is already listed for a later series, the new lot and the month it starts are shown in brackets.

Each symbol has its own page with upcoming expiries and any listed lot revision, for example 360ONE, ABB, ABCAPITAL. See the full list grouped by industry.