Intrinsic value vs. extrinsic value
Every option premium splits into two parts, and keeping them straight is the difference between understanding a price and guessing at it. Premium = intrinsic value + extrinsic value.
Intrinsic value: what it’s worth right now
Intrinsic value is the exercise value an option has this instant. For a call it is (price − strike), floored at zero; for a put it is (strike − price), floored at zero. A $90 call on a $100 stock has $10 of intrinsic value. An out-of-the-money option has zero intrinsic value — there is nothing to exercise for a gain.
Extrinsic value: what you pay for time and uncertainty
Extrinsic value (also called time value) is everything above intrinsic. It is what a buyer pays for the possibility that the option becomes more valuable before expiration. Two forces drive it: time to expiration (more time, more chance) and implied volatility (bigger expected swings, more chance). Extrinsic value is highest at-the-money and decays to nothing by expiration — a process called time decay, or theta.
Stock at $100. A $95 call trades for $7.00. Intrinsic value is $100 − $95 = $5. The remaining $2 is extrinsic — the market’s charge for the time and uncertainty left. Now the $100 (ATM) call trades for $3.00: intrinsic value is $0, so the entire $3 is extrinsic. At-the-money, premium is pure expectation, which is why ATM options are the cleanest gauge of implied volatility.
Why the split matters
When you buy an option, the intrinsic part is value you already have; the extrinsic part is value that melts as expiration approaches and can vanish if volatility falls. A trader who buys rich extrinsic value needs the underlying to move enough to overcome that decay. A seller, conversely, is selling extrinsic value and profits as it decays — provided the move stays contained.
Common pitfalls
Overpaying for extrinsic value into an event. Before earnings, extrinsic value swells as implied volatility rises. Buy then, and a “vol crush” after the event can lose you money even if the stock moves your way.
Thinking a deep-ITM option is “safe” from decay. It has little extrinsic value to lose, true — but it also behaves like stock, so you’re paying up for less optionality.
What to do with this
For any option, split the premium: intrinsic is real, extrinsic is expectation that decays. If you’re a buyer, ask whether the expected move justifies the extrinsic value you’re paying; if you’re a seller, that extrinsic value is your edge. Since extrinsic value is priced from implied volatility, the next natural step is learning to read it — Volatility 101. First, though: what actually happens at expiration.
Next lesson · continue the courseExpiration, exercise, and assignment →
Extrinsic value is priced from implied volatility. Volatility 101 shows you how to read it.