Retail participation in India’s futures and options (F&O) segment has grown enormously, and Nifty index options are now among the most traded contracts in the world. The results for individual traders, though, have been poor. SEBI’s study of FY2024-25 found that 91% of individual traders in equity F&O lost money, with losses of about ₹1.05 lakh crore in that year alone.
A big reason is that many traders don’t understand how buying an option differs from selling one. This guide explains the mechanics, the capital each needs and the risks on both sides.
1. Options buying: small cost, low odds
When you buy a call (CE) or put (PE) option, you pay a premium for the right, but not the obligation, to buy or sell the underlying at the strike price before expiry.
- Capital required: low. You pay only the premium. An out-of-the-money (OTM) Nifty option can cost just a few thousand rupees per lot (one Nifty lot is 65 units since January 2026).
- Risk: your maximum loss is the premium you paid. The potential gain is large: in theory unlimited for a call, and up to the strike price minus the premium for a put.
- The catch: to make money, you need the direction, size and timing of the move to go your way, and quickly. If the market drifts sideways, the option loses value every day.
The buyer’s hidden cost: theta (time decay). An option’s price includes time value, which shrinks as expiry approaches and falls fastest in the final days. OTM options have no intrinsic value, so if the market doesn’t move past the strike, they expire worthless.
2. Options selling: high odds, heavy tail risk
When you sell (write) an option, you receive the premium upfront and take on the obligation. You keep the full premium if the option expires worthless.
- Capital required: high. The clearing corporation sets the margin (SPAN plus exposure margin), and your broker collects it upfront. Selling one naked Nifty option often needs well over ₹1 lakh. The exact amount changes with the index level, volatility and strike, so check your broker’s margin calculator.
- Risk: your maximum profit is the premium received. Without a hedge, your potential loss is very large: for a call seller it’s unlimited, and for a put seller it can run to many times the premium if the market falls sharply or opens with a big gap.
- The catch: sellers make money when the market stays within a range, moves slowly, or moves their way, because time decay works in their favour. That means they win often, but one sharp move can wipe out months of small gains.
3. Buyer vs seller: head-to-head
| Factor | Option buyer | Option seller (writer) |
|---|---|---|
| Capital required | Low: premium only | High: exchange margin collected upfront |
| Maximum profit | Large (unlimited for a call) | Limited to premium received |
| Maximum loss | Limited to premium paid | Very large, unlimited for a naked call |
| Time decay (theta) | Works against you | Works for you |
| How often trades win | Less often, with bigger wins | More often, with smaller wins |
| Helped by | Sharp, fast moves and rising volatility | Range-bound markets and falling volatility |
A note on win rates: you’ll often see claims that sellers win “66% of the time”. The real odds depend on the strike chosen and on market conditions. More importantly, a high win rate doesn’t mean a strategy makes money overall: what counts is the size of the wins compared with the size of the losses, after costs.
4. Hedging: how sellers limit their risk
Selling naked options exposes you to extreme moves. Many sellers instead use spreads, buying a further OTM option against the one they sell. A bull put spread, a bear call spread or an iron condor caps the maximum loss at the gap between the strikes minus the premium received.
Because a hedged position has a defined maximum loss, the clearing corporation’s margin system recognises the offset, so a spread usually needs much less margin than a naked sale, often a fraction of it. The exact figure depends on how far apart the strikes are.
5. What SEBI’s recent F&O rules changed
From late 2024 into 2025, SEBI tightened index derivatives rules to curb speculation. The key changes are:
- One weekly expiry per exchange: NSE now offers weekly options only on Nifty 50. Bank Nifty, FinNifty and other indices have monthly expiries only.
- Bigger contracts: the minimum contract value was raised, which is why lot sizes were revised. Nifty is now 65 units.
- Premium paid upfront: option buyers must pay the full premium upfront, with no intraday leverage.
- Extra margin on expiry day: short options carry an additional 2% exposure margin on expiry day, and calendar spreads lose their margin benefit on the expiry day.
Frequently asked questions
Why is the margin for selling options so high?
Because an unhedged option seller can lose far more than the premium received. If the market gaps sharply overnight, a naked seller could owe lakhs of rupees. The clearing corporation sets margins high enough to cover large one-day moves, so that a trader’s loss doesn’t become a default that hurts the broker or the exchange.
Can I sell options with ₹50,000 in my account?
Not naked, in most cases, because selling a single Nifty option usually needs more than that. A hedged spread can need much less margin, so it may fit within ₹50,000 depending on the strikes. But a smaller margin doesn’t mean a small risk: you can still lose the full difference between the strikes, minus the premium, on each lot.
Does option selling give a steady monthly income?
No strategy gives guaranteed or steady income. Sellers collect small premiums often, but a single sharp move can cause a loss larger than many months of gains. SEBI’s studies show that most individual F&O traders lose money overall, whether they buy or sell.
Why do OTM options go to zero at expiry?
An out-of-the-money option has no intrinsic value: its whole price is time value. At expiry, no time is left, so if the index or stock hasn’t crossed the strike price, the option settles at zero.
Is options trading riskier than investing in shares?
For most people, yes. F&O is a zero-sum game before costs, and after brokerage, taxes and slippage, the participants as a whole lose money. Options also use leverage and have a fixed expiry. With shares, you can hold a fundamentally sound business through a downturn. With options, being right about the direction but wrong about the timing can still mean losing everything you put in. For long-term investing, see our framework for valuing small-cap and mid-cap stocks.
The bottom line
Option buyers risk a little to make a lot but need fast, correct moves. Option sellers earn small amounts often but carry the risk of large losses. Neither side is an easy path to profit. If you trade F&O at all, understand theta, margin and the worst-case loss before placing a trade, and size positions so that no single loss can do serious damage.
This article is for education only and is not a recommendation to buy, sell or trade any security or derivative. Margin figures vary with market conditions; check your broker’s margin calculator. Derivatives carry a high risk of loss: SEBI’s study found that 9 in 10 individual traders in equity F&O lost money.
Please note: This article is for educational purposes only. Nothing here is a recommendation to buy or sell any security, IPO or investment. Do your own research and read all related documents carefully before investing. Disclosures