Options are the most-traded derivatives in India, with index options accounting for the bulk of activity on NSE. They are powerful tools — and also where most individual traders lose money. Before trading them, you need to understand exactly what you are buying or selling.
What is an option?
An option is a contract that gives the buyer the right, but not the obligation, to buy or sell an underlying asset at a fixed price (the strike) on or before a date (the expiry).
- A call option gives the right to buy. Call buyers profit if the price rises above the strike plus the premium paid.
- A put option gives the right to sell. Put buyers profit if the price falls below the strike minus the premium.
The buyer pays a premium to the seller (also called the writer). The seller receives the premium and takes on the obligation.
See call and put options explained for detailed examples.
Key terms
- Strike price: the fixed price in the contract.
- Expiry: the date the contract ends. Index options have weekly and monthly expiries on Indian exchanges, according to current exchange schedules.
- Lot size: the minimum quantity per contract, set by the exchange and revised periodically. For example, from January 2026 the Nifty 50 lot was 65 units and Bank Nifty 30 — always check the current specification.
- In the money (ITM), at the money (ATM), out of the money (OTM): whether the option has intrinsic value.
- Premium = intrinsic value + time value.
Buyers vs sellers
| Option buyer | Option seller | |
|---|---|---|
| Pays/receives | Pays premium | Receives premium |
| Maximum loss | Premium paid | Can be very large (unlimited for naked calls) |
| Maximum profit | Can be large | Premium received |
| Time decay | Works against | Works in favour |
| Capital needed | Premium | Significant margin |
Read option buying vs option selling.
The Greeks in one paragraph
Delta shows how much the premium moves for a 1-point move in the underlying. Theta shows how much value the option loses per day from time decay. Vega shows sensitivity to changes in implied volatility. Gamma shows how fast delta changes. Understanding these explains why an option can lose money even when you are right about direction. Full guide: option Greeks explained.
Why most beginners lose with options
- Buying cheap far-OTM options that rarely become profitable.
- Ignoring time decay, especially close to expiry.
- Overtrading on expiry days.
- Selling options without understanding the risk of large moves.
- Position sizes far too large for the account.
SEBI's 2024 study found that about 93% of individual F&O traders lost money between FY22 and FY24. Read why most traders lose money.
Visualise before you trade
Our free options strategy builder shows the payoff of any option position at expiry and today, plus breakevens, maximum profit and loss, and Greeks. Try a bull call spread and compare it with a plain long call to see how spreads reduce cost and risk.
A sensible learning path for options
- Master price charts and risk management first.
- Learn option pricing and the Greeks.
- Paper trade simple defined-risk strategies (spreads) before naked positions.
- Keep position sizes small and journal every trade.
Costs and taxes
From 1 April 2026, STT on options sales is 0.15% of the premium, and on futures 0.05% — check the STT calculator and brokerage calculator. F&O income is generally treated as non-speculative business income; see tax on intraday and F&O income.
Key takeaways
- Options give buyers rights and sellers obligations; premiums reflect intrinsic and time value.
- Buyers have limited loss but fight time decay; sellers collect premium but face large risks.
- Understand lot sizes, Greeks and costs before trading.
- Start with defined-risk strategies and small size.
Frequently asked questions
Is options trading good for beginners?
Options are complex. Beginners should first learn charts and risk management, then study options carefully and start with small, defined-risk positions.
How much money do I need to trade options?
Buying options requires only the premium, but small capital does not mean low risk. Selling options requires significant margin.
Why do option buyers lose money so often?
Time decay erodes premiums every day, and many buyers choose far-OTM strikes that rarely become profitable before expiry.
Where can I learn options trading?
Options are covered in the advanced part of our technical analysis course, after charting and risk management.
BullishBrush provides stock market education only. We are not a SEBI-registered investment adviser or research analyst and do not give buy/sell recommendations or tips. Investments in securities markets are subject to market risks; read all related documents carefully before investing. Past performance does not guarantee future results.