Options Trading Basics
A comprehensive introduction to the world of options for beginners and advanced traders.
What Are Options?
Options are financial derivatives that give the buyer the right (but not the obligation) to buy or sell an underlying asset at a predetermined price (strike) before or on a specific date (expiration).
Call Option
A call option gives the buyer the right to buy the underlying asset at the strike price. Buyers profit from rising prices.
Put Option
A put option gives the buyer the right to sell the underlying asset at the strike price. Buyers profit from falling prices.
Strike Price (Exercise Price)
The predetermined price at which the underlying asset can be bought or sold when the option is exercised.
Expiration Date
The date by which the option can be exercised. After this date, the option expires worthless if not exercised.
Option Premium
The price the buyer pays for the option. The premium consists of intrinsic value and time value.
How Do Options Work?
Buyer and Seller: Rights and Obligations
Every options trade involves two parties: the buyer (holder) and the seller (writer). The buyer pays the premium and receives a right in return. The seller collects the premium and takes on an obligation. This fundamental principle is the most important building block for understanding options.
The buyer of a call option has the right to buy the underlying asset at the strike price. The seller of that call option is obligated to deliver the underlying asset at the strike price if the buyer exercises their right. Conversely, the buyer of a put option has the right to sell, while the put seller is obligated to buy.
Think of it like insurance: the buyer pays a premium for protection (the right), and the seller assumes the risk in exchange for payment. The premium is the maximum loss for the buyer, but also the maximum profit for the seller. The potential loss for the seller, however, can be significantly higher.
Reading and Understanding Option Chains
An option chain is a table that displays all available options for a specific underlying asset. It is the most important tool for every options trader. Typically, calls are shown on the left side and puts on the right side, with strike prices listed in the middle.
Each row shows a strike price with its associated data: bid price, ask price, last traded price, volume (number of contracts traded that day), and open interest (total number of outstanding contracts). For a stock trading at ₹100, you might see calls with strikes of ₹90, ₹95, ₹100, ₹105 and ₹110, each with different premiums.
Volume and open interest are particularly important: high volume means many contracts are being traded and you can easily enter and exit positions. High open interest shows that many open positions exist. Both together indicate a liquid option where the difference between bid and ask (the spread) is small.
American vs. European Style Options
The difference between American and European options refers not to the trading location, but to the exercise timing. American options can be exercised at any time up to the expiration date. European options can only be exercised on the expiration date itself.
In India, all options on NSE and BSE, on indices and on single stocks alike, are European style; many stock options on US exchanges, by contrast, are American style. For beginners, the difference is often negligible since most traders sell options before expiration rather than exercising them. However, it is important to know that with an American option, you can be assigned at any time if you hold the seller side.
A practical example: if you hold an American call option on a stock with a ₹150 strike and the price rises to ₹170, you can exercise the option immediately and buy the shares for ₹150. With a European option, you would have to wait until the expiration date — although you can of course sell the option on the market at any time.
In the Money, At the Money, Out of the Money
The moneyness status of an option describes the relationship between the current price of the underlying asset and the strike price. This concept is fundamental to option valuation and determines whether an option has intrinsic value.
In the Money (ITM)
The option has intrinsic value. For calls, the price is above the strike; for puts, it is below the strike.
Call Example:
Stock at ₹108, Strike ₹100 → ₹8 in the money
Put Example:
Stock at ₹92, Strike ₹100 → ₹8 in the money
At the Money (ATM)
The price of the underlying roughly equals the strike price. The option has no intrinsic value, but the highest time value.
Call & Put Example:
Stock at ₹100, Strike ₹100 → At the money
Intrinsic value: ₹0. The entire price consists of time value.
Out of the Money (OTM)
The option has no intrinsic value. For calls, the price is below the strike; for puts, it is above the strike. The option consists only of time value.
Call Example:
Stock at ₹95, Strike ₹100 → ₹5 out of the money
Put Example:
Stock at ₹105, Strike ₹100 → ₹5 out of the money
Why does this matter? ITM options are more expensive but have a higher probability of ending profitably. OTM options are cheaper and offer higher leverage, but expire worthless more often. ATM options offer a middle ground and react most strongly to price movements of the underlying (they have the highest gamma). As a rule of thumb: about 70% of all options held to expiration end up worthless.
Intrinsic Value and Time Value
The price of an option (the premium) is composed of two components: intrinsic value and extrinsic value (also called time value). Understanding this breakdown is crucial because it explains why options become more or less expensive.
Intrinsic value is the amount by which an option is in the money. For a call option, it is the difference between the current price and the strike price (if positive). For a put option, it is the difference between the strike price and the current price (if positive). At-the-money or out-of-the-money options have zero intrinsic value.
Time value represents the possibility that the option may gain value before expiration. It is influenced by the remaining time to expiration, the volatility of the underlying, and interest rates. The longer the remaining time and the higher the volatility, the greater the time value. On expiration day, time value is zero — the option is then worth only its intrinsic value.
Numerical Example: Premium Breakdown
Underlying: Stock XYZ, current price ₹180
Option: Call, Strike ₹170, 60 days to expiration
Current Premium: ₹15
Breakdown:
Intrinsic Value
₹10
(₹180 - ₹170)
Time Value
₹5
(₹15 - ₹10)
With 60 days remaining, nearly one-third of this option's price consists of time value. If only 10 days remained, the time value would be significantly lower — perhaps only ₹1-2. This decay of time value accelerates in the final weeks before expiration and is known as theta decay.
Understanding Option Contracts
Contract Size: 100 Shares per Contract
In India, an options contract covers one lot: a fixed quantity of the underlying that the exchange sets for each stock and index. With a lot of 100 shares, an option bought for ₹3 per share costs ₹300 for the whole contract (₹3 x 100 shares). The lot size is the key to understanding the actual costs and profits.
Lot sizes differ from one underlying to the next, and NSE and BSE revise them from time to time. Always check the current contract specifications on the exchange website before you trade.
The Leverage Effect in Options
Options offer natural leverage: you control a large position with a relatively small capital outlay. This leverage is one of the main reasons traders use options. It works in both directions — it multiplies both gains and losses (relative to the capital invested).
Leverage is calculated as: (stock price x 100) / (option premium x 100). If a stock is at ₹100 and a call option costs ₹3, the leverage is 100/3 = 33.3. This means: a 1% change in the stock price can cause up to a 33% change in the option's value. In practice, actual leverage is somewhat lower and depends on the option's delta.
Cost Comparison: Buying Shares vs. Buying an Option
The following comparison shows why options are attractive to some investors — and where the risks lie.
Buy 100 Shares
Capital required: 100 × ₹100 = ₹10,000
Price rises to ₹110: Profit ₹1,000 (+10%)
Price falls to ₹90: Loss ₹1,000 (-10%)
Max loss: ₹10,000 (total loss)
Buy 1 Call Option (Strike ₹100)
Capital required: ₹5 × 100 = ₹500
Price rises to ₹110: Profit ₹500 (+100%)
Price falls to ₹90: Loss ₹500 (-100%)
Max loss: ₹500 (only the premium)
With a ₹10 increase, the stockholder earns ₹1,000 on ₹10,000 invested (10% return). The option buyer earns ₹500 on ₹500 invested (100% return). However, the option buyer loses their entire ₹500 if the price is not above the strike at expiration. The stockholder, on the other hand, still owns their shares and can wait for a recovery.
Practical Examples
Buying a Call Option
Underlying: Stock XYZ, current price ₹100
Strike: ₹105
Expiration: 3 months
Premium: ₹3 per share
Scenarios:
- Price rises to ₹115: Profit of ₹7 per share (115 - 105 - 3)
- Price stays at ₹100: Option expires, loss of ₹3 (premium)
- Price falls to ₹90: Option expires, loss of ₹3 (premium)
Buying a Put Option
Underlying: Stock XYZ, current price ₹100
Strike: ₹95
Expiration: 3 months
Premium: ₹2 per share
Scenarios:
- Price falls to ₹80: Profit of ₹13 per share (95 - 80 - 2)
- Price stays at ₹100: Option expires, loss of ₹2 (premium)
- Price rises to ₹110: Option expires, loss of ₹2 (premium)
Note the difference: with a call, you profit from rising prices and hope the price rises above the strike. With a put, you profit from falling prices and hope the price falls below the strike. In both cases, your maximum loss is limited to the premium paid.
Key Takeaways
- ✓Options give the right, but not the obligation, to buy/sell
- ✓Maximum risk for buyers is limited to the premium
- ✓Options expire worthless if they are not in the money
- ✓One option contract covers one lot, a quantity set by the exchange
Common Beginner Mistakes
Options trading offers many opportunities, but beginners frequently fall into the same traps. Knowing these typical mistakes helps you avoid them from the start.
1. Buying Too Far Out of the Money
Cheap OTM options seem tempting because they cost little. But the probability that they finish in the money is low. A call option with a ₹150 strike at a price of ₹100 might cost only ₹0.20, but the stock would need to rise 50% for it to profit. Most of these options expire worthless.
2. Underestimating Time Decay
Every day, an option loses some time value (theta). This decay accelerates dramatically in the last 30 days before expiration. Beginners often hold options too long and wonder why the value drops even though the underlying barely moved. Plan your exit before time decay eats into your position.
3. Taking Positions That Are Too Large
Because options seem cheap, beginners often buy too many contracts. 10 contracts of an option at ₹2 means a ₹2,000 investment (10 x 100 x ₹2) — money that can be completely lost. A proven rule: never risk more than 2-5% of your trading capital on a single trade.
4. Trading Without an Exit Plan
Many beginners buy options without defining when to sell — neither at a profit nor at a loss. Before every trade, define: at what profit do I take gains? At what loss do I exit? Without clear rules, emotions like greed and fear lead to poor decisions.
5. Ignoring Implied Volatility
Implied volatility (IV) significantly affects the option price. Before earnings reports or major events, IV is often high, making options expensive. After the event, IV drops (volatility crush), and the option rapidly loses value — even if the price moves in the right direction. Always check IV before buying.
Next Steps
Understanding the Greeks
Delta, Gamma, Theta and Vega — the metrics every trader must know.
Options Strategies
19+ strategies for every market condition: Covered Call, Iron Condor, Spreads and more.
Beginner's Guide
Step-by-step introduction to options trading for beginners.
Learn this properly
Short lessons from the BeInOptions Academy — on exactly the questions this page raises. Free, and readable without an account.
What is an option?
The start of it: what an option contract actually is
Open the lesson →The 4 parts of an option
Underlying, strike, expiry, premium — the four parts of every option
Open the lesson →Buyer vs Seller
Why the buyer and the seller carry nothing like the same risk
Open the lesson →