Options Trading Basics for Indian Markets (NSE F&O)
Updated April 2026 · By PaperBull Editorial Team
Options are financial contracts that give the buyer the right, but not the obligation, to buy or sell an underlying asset at a predetermined price on or before a specific date. In India, options trading primarily takes place on the National Stock Exchange (NSE) under the Futures & Options (F&O) segment, with NIFTY 50 and BANKNIFTY being the most actively traded instruments.
Call Options (CE) and Put Options (PE)
There are two fundamental types of options in Indian markets:
Call Option (CE)
Gives the buyer the right to buy the underlying at the strike price. You profit when the market goes up. Buying a NIFTY CE is a bullish bet.
Put Option (PE)
Gives the buyer the right to sell the underlying at the strike price. You profit when the market goes down. Buying a NIFTY PE is a bearish bet.
Example: If NIFTY is trading at 24,000 and you buy a NIFTY 24,200 CE, you are betting that NIFTY will rise above 24,200 before expiry. If it does, your option gains value. If it doesn't, you lose the premium you paid.
Key Options Terminology
NSE F&O Lot Sizes (2025–2026)
Every options contract on NSE has a specific lot size. When you buy or sell options, you trade in multiples of these lot sizes. Here are the current lot sizes for major indices:
| Index | Lot Size | Expiry |
|---|---|---|
| NIFTY 50 | 75 shares | Weekly (Thursday) |
| BANKNIFTY | 15 shares | Weekly (Wednesday) |
| FINNIFTY | 65 shares | Weekly (Tuesday) |
| MIDCPNIFTY | 120 shares | Weekly (Monday) |
| SENSEX | 20 shares | Weekly (Friday) |
| BANKEX | 15 shares | Weekly (Monday) |
Lot sizes are revised periodically by SEBI/NSE. Always verify on NSE India's official website before trading real money.
How Option Premiums Work
The price you pay for an option is called the premium. Premium has two components:
- Intrinsic Value: The actual in-the-money value of the option. A NIFTY 23,800 CE when NIFTY is at 24,000 has ₹200 intrinsic value (24,000 – 23,800).
- Time Value (Extrinsic Value): The additional premium above intrinsic value, reflecting time remaining to expiry and implied volatility. This decays as expiry approaches — a phenomenon called Theta decay.
An ATM option might have zero intrinsic value but significant time value. As expiry approaches, this time value drops to zero — which is why option buyers must be right about both direction and timing.
Buying vs Selling Options
In Indian F&O markets, you can be on either side of the trade:
- Option Buyer (Long): Pays a premium, has unlimited profit potential, and the maximum loss is limited to the premium paid. Requires correct directional and timing judgment.
- Option Seller (Short/Writer): Collects premium upfront, has limited profit (the premium received) but theoretically unlimited risk. Requires margin deposit. Benefits from Theta decay.
Most retail traders start as option buyers due to limited capital requirements and capped losses. Option selling (writing) is typically for experienced traders with larger capital and risk management systems.
Practical Example: BANKNIFTY Trade
Suppose BANKNIFTY is trading at 55,000. You believe it will rise to 55,500 before Thursday expiry (2 days away).
- You buy 1 lot of BANKNIFTY 55,100 CE at a premium of ₹80.
- Cost: ₹80 × 15 (lot size) = ₹1,200 total premium paid.
- If BANKNIFTY rises to 55,500, the CE premium might increase to ₹400.
- Profit: (₹400 – ₹80) × 15 = ₹4,800 profit on ₹1,200 invested.
- If BANKNIFTY falls instead, the option expires worthless and you lose ₹1,200 (maximum loss).
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