Option Pricing: Intrinsic vs Extrinsic Value
Understand what determines option prices. Learn about intrinsic value, extrinsic value, and how time decay affects your trades.
Option Pricing: Intrinsic vs Extrinsic Value
Understanding how options are priced helps you find better trades and manage positions effectively. Option prices have two components: intrinsic value and extrinsic value.
The Pricing Formula
Option Price = Intrinsic Value + Extrinsic Value
Let's break down each component.
Intrinsic Value
Intrinsic value is the real, tangible value of an option - what it would be worth if exercised immediately.
For Calls:
Intrinsic Value = Stock Price - Strike Price (if positive)
For Puts:
Intrinsic Value = Strike Price - Stock Price (if positive)
Examples with stock at $50:
| Option | Calculation | Intrinsic Value |
|---|---|---|
| $45 Call | $50 - $45 | $5.00 |
| $55 Call | $50 - $55 | $0 (negative = 0) |
| $55 Put | $55 - $50 | $5.00 |
| $45 Put | $45 - $50 | $0 (negative = 0) |
Key insight: Out-of-the-money options have ZERO intrinsic value. Their entire price is extrinsic value.
Extrinsic Value (Time Value)
Extrinsic value represents the potential for the option to become more valuable before expiration. It's also called "time value" because it decreases as time passes.
Extrinsic value is affected by:
- Time remaining - More time = more value
- Implied volatility - Higher IV = more value
- Distance from strike - ATM options have highest extrinsic value
Calculating Extrinsic Value:
Extrinsic Value = Option Price - Intrinsic Value
Example:
- Stock at $50
- $45 Call trading at $7.00
- Intrinsic: $50 - $45 = $5.00
- Extrinsic: $7.00 - $5.00 = $2.00
Time Decay (Theta)
Extrinsic value decays over time - this is called theta decay.
Key Facts About Theta:
- Theta is always negative for option buyers
- Theta accelerates as expiration approaches
- ATM options have the highest theta
- OTM and deep ITM options have lower theta
Theta Decay Curve:
Value
|
|\
| \
| \
| \__
| \__
| \___
|-------------\---> Days to Expiration
90 60 30 14 7 0
Notice how decay accelerates in the last 30 days.
Why This Matters for Sellers
As an option seller in the wheel strategy:
- You collect extrinsic value when you sell
- Time decay works FOR you - extrinsic value goes to zero
- You want fast theta decay - 30-45 DTE is optimal
Example: You sell a put for $1.50:
- Intrinsic value: $0 (OTM put)
- Extrinsic value: $1.50
If the stock stays above your strike, that $1.50 decays to $0 by expiration - and you keep it all.
Factors Affecting Extrinsic Value
| Factor | Effect on Premium |
|---|---|
| More time to expiration | Higher |
| Higher implied volatility | Higher |
| Closer to ATM | Higher |
| Lower interest rates | Slightly lower |
| Upcoming dividend | Affects calls/puts differently |
Implied Volatility's Role
Implied Volatility (IV) represents the market's expectation of future price movement.
High IV (e.g., 60%+):
- Options are expensive
- Market expects big moves
- Great for sellers (more premium)
Low IV (e.g., 20%):
- Options are cheap
- Market expects stability
- Less premium for sellers
IV Crush: After events like earnings, IV often drops sharply. If you sold options before an event, this can be profitable even if the stock moves against you.
Practical Pricing Example
Stock XYZ at $100, 30 days to expiration:
| Strike | Type | Price | Intrinsic | Extrinsic |
|---|---|---|---|---|
| $95 | Put | $1.20 | $0 | $1.20 |
| $100 | Put | $3.00 | $0 | $3.00 |
| $105 | Put | $6.50 | $5.00 | $1.50 |
| $95 | Call | $7.00 | $5.00 | $2.00 |
| $100 | Call | $3.50 | $0 | $3.50 |
| $105 | Call | $1.50 | $0 | $1.50 |
Notice:
- ATM options ($100) have highest extrinsic value
- OTM options are 100% extrinsic value
- ITM options have lower extrinsic value
Key Takeaways for Wheel Trading
- Sell OTM options - You're selling pure extrinsic value
- Target 30-45 DTE - Optimal theta decay
- Sell when IV is high - More premium to collect
- Avoid very low extrinsic value - Not worth the risk
In the next lesson, we'll cover what happens when you get assigned on an option.