Call and put options are two basic types of options contracts used in the derivatives market.
A call option gives the buyer the right, but not the obligation, to buy the underlying asset at a specified strike price according to the contract terms.
A put option gives the buyer the right, but not the obligation, to sell the underlying asset at a specified strike price according to the contract terms.
In simple terms:
Call option buyer → generally expects the price to rise
Put option buyer → generally expects the price to fall
However, options are more complicated than simply predicting whether the market will go up or down. Option prices are also affected by time remaining until expiry, implied volatility, strike price, and changes in the underlying asset.
This beginner’s guide explains calls and puts, strike prices, premiums, expiry, ITM/ATM/OTM options, option Greeks, risks, and simple examples.
Disclaimer: This article is for educational and informational purposes only. It does not constitute investment, financial, or trading advice. Options and other derivatives involve substantial risk, and losses are possible.
Quick Answer: What Are Call and Put Options?
A call option gives its buyer the right to buy an underlying asset at a predetermined strike price according to the contract terms.
A put option gives its buyer the right to sell an underlying asset at a predetermined strike price according to the contract terms.
The option buyer pays a premium for this right.
The option seller, or writer, receives the premium and takes on the corresponding contractual obligation.
For a straightforward purchased option, the premium paid is the main direct amount at risk, before considering transaction costs and settlement-related details.
Option sellers can face substantially different and potentially much larger risks depending on the position.
Call Option vs Put Option
| Feature | Call Option | Put Option |
|---|---|---|
| Buyer generally expects | Price to rise | Price to fall |
| Buyer receives | Right to buy | Right to sell |
| Seller has | Corresponding obligation | Corresponding obligation |
| Buyer pays | Premium | Premium |
| Benefits buyer from | Sufficient upward movement | Sufficient downward movement |
| Basic directional view | Bullish | Bearish |
| Time decay | Can work against buyer | Can work against buyer |
| Buyer risk in a straightforward long option | Primarily premium paid + costs | Primarily premium paid + costs |
This table describes straightforward call and put purchases. More advanced options strategies can have very different payoff structures.
What Is an Option?
An option is a derivative contract.
Its value is linked to an underlying asset or market.
Depending on the contract, the underlying may include instruments such as:
- Stocks
- Stock-market indices
- Other eligible underlying assets
Unlike buying shares in the cash market, purchasing an option does not automatically make you a shareholder in the underlying company.
Instead, you are buying a contractual right.
Options have several important components:
Underlying Asset → Strike Price → Premium → Expiry → Contract Size
Understanding these terms is essential before studying options strategies.
What Is a Call Option?
A call option gives the buyer the right, but not the obligation, to buy the underlying at the specified strike price according to the option contract.
Call buyers generally have a bullish view.
Suppose a stock is trading at ₹1,000.
You believe its price could rise, so you buy a call option with a strike price of ₹1,050.
If the underlying stock rises substantially, the call option may become more valuable.
But buying a call does not guarantee a profit.
The option’s result also depends on factors such as:
- Premium paid
- Size and timing of the price movement
- Time remaining to expiry
- Implied volatility
- Transaction costs
This is why simply being correct about direction may not always produce a profitable options trade.
Simple Call Option Example
Consider a simplified hypothetical example.
Stock price = ₹500
Call strike price = ₹520
Option premium = ₹15 per share
Suppose you buy the ₹520 call.
You now have a bullish position.
If the Stock Rises to ₹550 at Expiry
The call has ₹30 of intrinsic value:
₹550 − ₹520 = ₹30
But you originally paid ₹15.
Ignoring transaction costs and other details, the simplified net amount per share would be:
₹30 − ₹15 = ₹15
If the Stock Remains Below ₹520 at Expiry
The call has no intrinsic value at expiry.
For a straightforward purchased call that expires worthless, the buyer can lose the premium paid.
This example illustrates why you need more than the correct directional idea.
The underlying needs to move sufficiently relative to the strike and premium.
What Is a Put Option?
A put option gives the buyer the right, but not the obligation, to sell the underlying at the specified strike price according to the contract terms.
Put buyers generally have a bearish view.
Suppose a stock is trading at ₹1,000.
You believe it could decline, so you buy a put option with a strike price of ₹950.
If the underlying falls sufficiently, the put may become more valuable.
Again, profitability depends on more than direction.
Premium, time, volatility, strike selection, and the size of the move all matter.
Simple Put Option Example
Consider another hypothetical example.
Stock price = ₹500
Put strike price = ₹480
Premium = ₹10 per share
You buy the ₹480 put.
If the Stock Falls to ₹450 at Expiry
The put has ₹30 of intrinsic value:
₹480 − ₹450 = ₹30
You paid ₹10 for the option.
Ignoring transaction costs and other details:
₹30 − ₹10 = ₹20
would be the simplified net amount per share.
If the Stock Remains Above ₹480 at Expiry
The put has no intrinsic value at expiry.
A straightforward purchased put that expires worthless can result in the buyer losing the premium paid.
Call Buyer vs Call Seller
Understanding the difference between buying and selling an option is essential.
Call Buyer
The call buyer pays a premium and receives a right.
The buyer generally wants the underlying price to rise sufficiently.
Call Seller
The call seller receives the premium and takes on the corresponding obligation.
The risk profile is very different from buying a call.
An unhedged call seller can face substantial losses if the underlying rises sharply.
Therefore:
Buying a call and selling a call are not opposite versions of the same risk.
Their payoff and risk structures are different.
Put Buyer vs Put Seller
The same distinction applies to puts.
Put Buyer
The buyer pays the premium and receives the right to sell according to the contract terms.
The buyer generally benefits from a sufficiently large decline in the underlying.
Put Seller
The seller receives the premium and takes on the corresponding obligation.
An unhedged put seller can face substantial losses if the underlying falls sharply.
Options selling should therefore not be treated as an easy way to collect premium.
Important Options Terms Every Beginner Should Know
Before trading calls and puts, understand the basic vocabulary.
Strike Price
The strike price is the predetermined price specified in the options contract.
For a call, it is the price associated with the buyer’s right to buy.
For a put, it is the price associated with the buyer’s right to sell.
For example:
Stock price = ₹1,000
Available strikes might include:
₹950
₹1,000
₹1,050
Different strikes will have different premiums and risk characteristics.
Option Premium
The premium is the market price of the option.
The buyer pays the premium.
The seller receives it.
Option premiums are influenced by several factors, including:
- Underlying price
- Strike price
- Time until expiry
- Implied volatility
- Interest rates and other pricing inputs
The premium changes continuously while the option is trading.
Expiry Date
Options contracts have a defined expiry.
As the contract approaches expiry, the amount of remaining time decreases.
Expiry schedules and contract specifications can change, so traders should verify the current contract details through the relevant exchange or broker before trading.
Do not assume that every index or stock option follows the same expiry schedule.
Lot Size
Exchange-traded options are traded according to specified contract quantities or lot sizes.
For example, if:
Premium = ₹100
Lot size = 50
then the simplified premium amount for one lot would be:
₹100 × 50 = ₹5,000
Lot sizes can change.
Always check the current contract specifications before calculating capital requirements or risk.
Intrinsic Value
Intrinsic value measures how much an option is in the money based on the underlying price and strike price.
For a call:
Call Intrinsic Value = Max(Underlying Price − Strike Price, 0)
For a put:
Put Intrinsic Value = Max(Strike Price − Underlying Price, 0)
Suppose a stock is at ₹550 and you hold a ₹500 call.
Intrinsic value:
₹550 − ₹500 = ₹50
Extrinsic or Time Value
An option premium can also contain value beyond intrinsic value.
This is commonly called extrinsic value or time value.
It reflects factors such as:
- Remaining time
- Implied volatility
- Market expectations
As expiry approaches, the time component can decline, all else being equal.
What Are ITM, ATM and OTM Options?
Options are often classified according to the relationship between the strike price and underlying price.
In the Money (ITM)
An option is ITM when it has intrinsic value.
Call Option
A call is ITM when:
Strike Price < Underlying Price
Example:
Stock = ₹500
Call strike = ₹450
The call is ITM.
Put Option
A put is ITM when:
Strike Price > Underlying Price
Example:
Stock = ₹500
Put strike = ₹550
The put is ITM.
At the Money (ATM)
An option is generally described as ATM when its strike is at or very close to the current underlying price.
Example:
Stock ≈ ₹500
Strike ≈ ₹500
Out of the Money (OTM)
An OTM option has no intrinsic value.
Call Option
A call is OTM when:
Strike Price > Underlying Price
Put Option
A put is OTM when:
Strike Price < Underlying Price
OTM options can still have a premium before expiry because they may retain extrinsic value.
What Is Time Decay in Options?
Options have limited lives.
As time passes, the amount of time remaining for the expected price movement to occur decreases.
This can reduce the time value of an option, all else being equal.
This effect is commonly called time decay.
Time decay is particularly relevant to option buyers because the underlying asset may move in the expected direction but not quickly or far enough to offset the loss of time value and other changes in the premium.
However, saying that time decay always occurs at the same speed would be inaccurate.
Its effect varies according to factors such as:
- Time remaining
- Moneyness
- Implied volatility
- Market conditions
What Are Option Greeks?
Option Greeks are measurements used to understand how an option’s theoretical value may respond to different variables.
Beginners should know five main Greeks:
Delta, Gamma, Theta, Vega and Rho.
Delta
Delta measures how an option’s value is expected to change for a change in the price of the underlying, with other factors held constant.
Calls generally have positive delta.
Puts generally have negative delta.
Delta is not a guaranteed prediction of the option’s next price.
Gamma
Gamma measures how quickly delta changes when the underlying price changes.
In simple terms:
Delta measures sensitivity to the underlying price.
Gamma measures the sensitivity of delta itself.
Theta
Theta measures the effect of the passage of time on an option’s theoretical value, with other factors held constant.
For a straightforward long option position, theta is generally negative because time passing can reduce the option’s time value.
Vega
Vega measures sensitivity to changes in implied volatility.
Generally, when implied volatility increases, option premiums can increase, all else being equal.
When implied volatility decreases, premiums can decrease, all else being equal.
Rho
Rho measures sensitivity to changes in interest rates.
For many short-term retail options trades, traders may focus more heavily on delta, gamma, theta, and vega, but rho remains part of options pricing.
Option Greeks at a Glance
| Greek | Primarily Measures |
|---|---|
| Delta | Sensitivity to underlying price |
| Gamma | Change in delta |
| Theta | Sensitivity to passage of time |
| Vega | Sensitivity to implied volatility |
| Rho | Sensitivity to interest rates |
Greeks are analytical tools, not guarantees.
Why Can an Option Lose Money Even When You Predict Direction Correctly?
This is one of the most important lessons for beginners.
Suppose you buy a call because you expect the market to rise.
The market rises slightly.
But your call still loses value.
How?
Possible reasons include:
The Move Was Too Small
The underlying rose, but not enough to offset other changes in the option premium.
The Move Took Too Long
Time value declined while you waited.
Implied Volatility Fell
A decline in implied volatility can reduce the option premium.
You Paid a High Premium
The market may already have priced in a large expected move.
This is why:
Correct Direction ≠ Guaranteed Options Profit
Options trading involves direction, magnitude, timing, volatility, and pricing.
What Is Implied Volatility?
Implied volatility, or IV, reflects the level of future volatility implied by option prices.
Higher expected volatility can contribute to higher option premiums, all else being equal.
Lower implied volatility can contribute to lower premiums.
IV often becomes particularly important around events such as:
- Earnings announcements
- Major economic data
- Monetary-policy decisions
- Significant company announcements
An option buyer can correctly predict direction but still face a disappointing result if implied volatility falls significantly.
What Is an IV Crush?
An IV crush refers to a sharp decline in implied volatility.
This can occur after an anticipated event has passed.
For example, implied volatility may rise before an earnings announcement because traders expect a large price movement.
After the announcement, uncertainty decreases.
Implied volatility can then fall.
As a result, option premiums can decline even when the underlying moves somewhat in the direction the trader expected.
What Is an Option Chain?
An option chain displays available options contracts for an underlying asset.
It commonly shows information such as:
- Strike prices
- Call premiums
- Put premiums
- Volume
- Open interest
- Bid and ask prices
- Other contract data
Learning to read an option chain can help beginners understand how different strikes are priced.
What Is Open Interest?
Open interest represents the number of outstanding derivative contracts that remain open.
It is not the same as trading volume.
Volume
Measures contracts traded during a period.
Open Interest
Measures outstanding open contracts.
Open interest can provide information about participation and positioning, but it should not be interpreted as a standalone prediction of market direction.
Call and Put Options for Hedging
Options are not used only for directional speculation.
They can also be used for hedging.
For example, an investor holding a portfolio may use puts as part of a strategy designed to reduce some downside exposure.
However, hedging is not free.
The option premium represents a cost, and the effectiveness of a hedge depends on factors such as:
- Strike selection
- Expiry
- Position size
- Correlation
- Timing
A poorly structured hedge may not offset losses as expected.
Risks of Buying Call and Put Options
Buying options can have limited direct downside relative to the premium paid in a straightforward long-option position, but that does not make option buying low-risk.
Important risks include:
Premium Can Be Lost
An option can expire worthless.
Time Decay
The value associated with remaining time can decline.
Implied Volatility Risk
Changes in IV can significantly affect premiums.
Leverage
Options can produce large percentage changes in position value.
Liquidity Risk
Some strikes can have wide bid-ask spreads or limited trading activity.
Slippage
Your actual execution price may differ from the price you expected.
Expiry and Settlement Risk
Holding contracts near or through expiry can involve additional settlement considerations.
Traders should understand the applicable exchange and broker rules before expiry.
Risks of Selling Options
Option selling has a different risk profile.
The seller receives premium but takes on an obligation.
Depending on the position, losses can be substantial.
Unhedged options selling can expose traders to significant risk and margin requirements.
Therefore, beginners should not assume:
Option buying = risky
but
Option selling = safe
Neither is automatically safe.
The risk depends on the complete position.
Common Call and Put Option Mistakes
Buying Because the Premium Looks Cheap
A ₹5 option is not automatically better value than a ₹100 option.
Far-OTM options can be inexpensive because the probability and conditions required for meaningful intrinsic value may be very different.
Ignoring Time Decay
Being right about direction may not be enough.
Ignoring Implied Volatility
High premiums before major events can change significantly afterward.
Using Excessive Position Size
Limited loss per purchased option does not mean you should buy an unlimited number of contracts.
Trading Without Understanding Expiry
Expiry and settlement rules matter.
Assuming OTM Options Are Easy Money
Low-priced OTM options can expire worthless.
Treating Option Selling as Guaranteed Income
Premium collection comes with contractual obligations and risk.
Trading Without Understanding the Underlying
Before trading an option, understand the asset or index on which it is based.
How Beginners Can Approach Options More Carefully
Options are complex instruments.
Before using real capital, beginners should understand:
- Calls and puts
- Strike prices
- Premiums
- Expiry
- Lot sizes
- ITM, ATM, and OTM
- Intrinsic and extrinsic value
- Implied volatility
- Option Greeks
- Settlement and expiry risk
- Position sizing
- Risk management
A useful learning sequence is:
Understand the Underlying → Learn Option Mechanics → Study Payoffs → Understand Greeks → Learn Risk → Practise Analysis → Consider Execution
Do not begin with complex strategies before understanding how a single call or put behaves.
Call and Put Options: Simple Example
Suppose an underlying stock is trading at ₹1,000.
Bullish View
You expect the stock to rise.
You might study a call option.
If the stock rises sufficiently within the relevant timeframe, the call may increase in value.
Bearish View
You expect the stock to fall.
You might study a put option.
If the stock falls sufficiently within the relevant timeframe, the put may increase in value.
But in both cases, your result depends on more than direction.
You must also consider:
How far?
How quickly?
What premium did you pay?
What happened to implied volatility?
That is the difference between understanding stock direction and understanding options.
Frequently Asked Questions
What is a call option in simple words?
A call option gives the buyer the right, but not the obligation, to buy an underlying asset at a specified strike price according to the contract terms. Call buyers generally have a bullish view.
What is a put option in simple words?
A put option gives the buyer the right, but not the obligation, to sell an underlying asset at a specified strike price according to the contract terms. Put buyers generally have a bearish view.
What is the main difference between calls and puts?
A call buyer generally benefits from a sufficient rise in the underlying price, while a put buyer generally benefits from a sufficient decline, subject to premium, timing, volatility, and other factors.
What is the strike price?
The strike price is the predetermined price specified in an options contract at which the relevant right can be exercised according to the contract terms.
What is an option premium?
The premium is the market price of an option. The buyer pays the premium and the seller receives it.
What is option expiry?
Expiry is when an options contract reaches the end of its contractual life. Exact expiry and settlement rules depend on the specific contract and current exchange specifications.
What are ITM, ATM and OTM options?
ITM means the option has intrinsic value. ATM means the strike is approximately equal to the underlying price. OTM means the option currently has no intrinsic value.
What is time decay?
Time decay describes the reduction in an option’s time value as time passes, with other factors held constant. Theta is commonly used to measure sensitivity to the passage of time.
What are option Greeks?
Option Greeks are measures of an option’s sensitivity to different variables. The main Greeks are delta, gamma, theta, vega, and rho.
Can I lose the entire premium when buying an option?
Yes. A purchased option can expire worthless, resulting in the premium being lost, along with applicable transaction costs.
Can an option seller lose more than the premium received?
Yes. Depending on the position, an option seller can face losses substantially greater than the premium received.
Are call options always bullish?
Buying a call is generally a bullish position. However, calls can also be components of more complex strategies, so the overall strategy may not necessarily be purely bullish.
Are put options always bearish?
Buying a put is generally bearish with respect to the underlying, but puts can also be used for hedging or as components of multi-leg strategies.
Why did my call option fall when the market went up?
Possible reasons include insufficient underlying movement, time decay, a decline in implied volatility, or the premium already reflecting high expectations.
Are options suitable for beginners?
Beginners should first understand the underlying market, option mechanics, premiums, expiry, volatility, Greeks, settlement, and risk management before deciding whether options are appropriate for them.
Is option buying safer than option selling?
They have different risk profiles. A straightforward option buyer generally has limited direct downside based primarily on the premium paid, while some option-selling positions can have much larger potential losses. Limited downside does not make option buying automatically safe or profitable.
Key Takeaways
Call and put options become easier to understand when you focus on their basic mechanics.
Remember:
- A call buyer generally expects the underlying price to rise.
- A put buyer generally expects the underlying price to fall.
- The option buyer pays a premium.
- The option seller receives the premium and assumes an obligation.
- Strike price defines the contractual price.
- Options have expiry dates.
- ITM options have intrinsic value.
- OTM options have no intrinsic value at that moment.
- Time decay can work against long-option positions.
- Implied volatility can significantly affect option premiums.
- Delta, gamma, theta, vega, and rho measure different option sensitivities.
- Correctly predicting direction does not guarantee an options profit.
- Option selling has different and potentially substantial risks.
- Options should be understood before leverage is used.
Final Thoughts
Call and put options are easier to understand when you start with one simple distinction:
Call buyer → right to buy
Put buyer → right to sell
From there, learn how the strike price, premium, expiry, moneyness, time decay, implied volatility, and Greeks affect the contract.
Do not think of options as simply:
“Market up = buy call”
or
“Market down = buy put.”
The actual result depends on direction, timing, magnitude of the move, volatility, premium paid, and the structure of the position.
For beginners, understanding these mechanics is more important than immediately learning complex options strategies.
Trading Smart Edge provides educational resources covering stock-market fundamentals, technical analysis, price action, futures and options, intraday trading, trading psychology, and risk management.
Disclaimer: This article is for educational and informational purposes only. It does not constitute investment, financial, or trading advice. Options and other derivatives involve substantial risk. Losses are possible, contract specifications can change, and no options strategy or analysis method guarantees profits.
