What is F&O? Futures and options explained for beginners

Futures and options — "F&O" in market shorthand — are among the most talked-about corners of the Indian markets, and among the most misunderstood. This guide explains what they actually are, in plain language, so you can recognise the mechanics when you see them. It is educational only: nothing here tells you what to buy or sell.

Start with the word "derivative"

A derivative is a contract whose value is derived from something else, called the underlying. In Indian F&O the underlying is usually an index — like the Nifty 50 or Bank Nifty — or an individual company's shares.

The key idea: you are not buying the share itself. You are trading a contract that tracks the underlying's price. Two building blocks matter — futures and options.

Futures: an agreement for a future date

A futures contract is an agreement to buy or sell the underlying at a price fixed today, settled on a fixed future date called the expiry. If you hold a futures contract and the underlying moves in your favour, the contract gains value; if it moves against you, it loses value — and those losses are settled daily, not just at expiry.

Because you put down only a fraction of the contract's full value to trade it (see margin below), futures are leveraged. Leverage magnifies both gains and losses, which is exactly why they demand respect.

Options: the right, not the obligation

An option gives its buyer a right — but not an obligation — to buy or sell the underlying at a set price (the strike) before or at expiry.

• A call option gives the right to buy.
• A put option gives the right to sell.

The buyer pays a premium for that right. If the option never becomes worthwhile to exercise, the buyer simply lets it expire and loses the premium — nothing more. The seller (or "writer") of the option collects that premium up front, but takes on the obligation to honour the contract if the buyer exercises it. That is a crucial asymmetry: an option buyer's loss is capped at the premium, while an option seller can face much larger losses.

Lot sizes: you trade in bundles

Indian F&O does not trade in single shares. Contracts come in fixed lots set by the exchange. One Nifty options lot, for example, represents a set number of index units; one stock futures lot represents a set number of that company's shares.

This matters for two reasons. First, it sets the minimum size of a position — you cannot trade half a lot. Second, it quietly scales up your exposure: a small-looking premium per unit becomes a much larger rupee amount once multiplied across a full lot. Exchanges and SEBI revise lot sizes from time to time, so always check the current contract specification rather than relying on an old number.

Expiry: contracts have a deadline

Every F&O contract expires. Index options have weekly expiries as well as monthly ones; stock derivatives typically settle monthly. As expiry approaches, an option's time value erodes — a phenomenon called time decay that we cover in our guide to the Option Greeks.

The practical takeaway: F&O is time-bound in a way that owning shares is not. A share can be held for years; an F&O contract cannot.

Margin versus premium: two different cash flows

This distinction trips up many beginners:

1. Buying an option costs a premium. That premium is the most a buyer can lose. There is no daily top-up.
2. Trading futures, or selling options, requires margin — a good-faith deposit the exchange holds against your position. Margin is marked to market: if the position moves against you, you may be asked to deposit more (a margin call). Losses here are not capped at your initial deposit.

Confusing these two is a common and expensive mistake. Paying a premium and posting margin are not the same thing.

Why F&O is genuinely risky

Leverage, time decay and the obligation carried by sellers combine to make F&O far riskier than buying shares outright. This is not a scare tactic — it is what the data shows.

A widely reported SEBI study found that roughly 9 in 10 individual traders in the equity F&O segment made net losses. Treat that as a caution, not a challenge.

The people who lose are not only careless beginners; the statistic includes plenty of committed, full-time participants. F&O rewards understanding of mechanics, position sizing and risk — and punishes guesswork.

The safe way to build understanding

You do not need to risk real money to learn how a call, a put or a futures contract behaves. You can watch how premium changes as the underlying moves, see how time decay eats into an option's value, and feel how leverage swings a position — all with virtual money.

That is exactly what a simulator is for: making your early mistakes free ones.

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Educational content only — not investment advice. Practise these concepts with ₹10,00,000 in virtual money on Finomin, where every trade is simulated and no real money is ever at risk.