What it means
An option's price, called the premium, has two parts. The first is intrinsic value, which is the amount by which the option is already in the money (profitable to exercise right now).
The second part is extrinsic value, the extra amount buyers pay for the chance that the option becomes more valuable. Extrinsic value is often called time value, though in practice it includes more than time.
The main drivers are the time left to expiry and the volatility (how much and how quickly the underlying price tends to move). Interest rates and expected dividends have smaller effects.
The more time remaining, the more chance that the share price will move in the buyer's favour, so the extrinsic value is higher. Higher volatility has the same effect.
This is why options on jumpy shares cost more than options on steady ones. As expiry approaches, extrinsic value decays and eventually reaches zero.
At that point the option is worth only its intrinsic value, if any. Traders call this decay of value time decay, and it works against anyone who bought the option and in favour of anyone who sold it.
Out-of-the-money options (those with no intrinsic value) consist entirely of extrinsic value. That means their whole premium is at risk of vanishing.
A company or investor buying them must be ready for the possibility of losing the full price paid. Practical use matters for businesses that hedge or reward staff with options.
The accounting cost of employee share options includes both intrinsic and extrinsic value at grant, so understanding the split helps finance teams explain the numbers. Treasury teams comparing hedging structures can also see how much of the price is paying for time and uncertainty.
In practice
Real-world examples.
Example
An investor buys a call option on a share at $50 with the share at $48. The option costs $2.00, all of which is extrinsic value because there is no intrinsic value. If the share stays at $48 until expiry, she loses the full $2.00.
Example
A treasurer compares two currency options for hedging a payment. The longer-dated one costs $60,000 more, and the difference is mostly extrinsic value for the extra time. She decides the shorter option is enough because the payment date is firm.
Example
A trader sells a put option and collects a premium of $3.00, all extrinsic value. As the weeks pass, the premium falls to $0.50 without the share price moving. He closes the position and keeps the difference.
Formula
Calculation
Extrinsic value = option premium - intrinsic value
For a call option, intrinsic value = share price - strike price, or zero if that is negative. Suppose a call option has a strike price of $100, the share trades at $108, and the option premium is $11.50. Intrinsic value = 108 - 100 = $8.00. Extrinsic value = 11.50 - 8.00 = $3.50. If nothing else changes, that $3.50 will fall to zero by expiry.Case study
Seen in the real world.
Summit Peak Industries is an illustrative, fictional manufacturer that buys call options on copper to protect against rising costs. Its treasury team paid $9.00 per unit for options where copper was $6.00 above the strike price.
The analyst, Priya, split the premium into $6.00 of intrinsic value and $3.00 of extrinsic value. She showed the board that the extrinsic portion would disappear over the next three months even if copper stayed flat.
In this fictional story the board chose to hedge using shorter-dated options, cutting the extrinsic cost by about 40%. The lesson is that knowing how much of a premium is time and uncertainty helps choose the right hedge at the right price. Priya now adds a column to every hedging proposal that shows intrinsic value, extrinsic value and the number of days to expiry. The board uses it to compare options quickly, and nobody has to ask what part of the price is actually paying for protection.
Watch out
Common mistakes.
- Assuming an option that is in the money keeps all of its premium, when the extrinsic part still decays.
- Believing out-of-the-money options are cheap bargains, when their whole price is extrinsic value that may vanish.
- Treating extrinsic value as only about time, when volatility is just as important.
Questions
People also ask.
Is extrinsic value the same as time value?
They are used almost interchangeably, though extrinsic value strictly includes the effects of volatility and interest rates as well as time.
Can extrinsic value be negative?
For standard listed American-style options it is zero or positive, because the holder can always exercise for at least the intrinsic value.
When is extrinsic value highest?
It is highest when the option is at the money, meaning the share price is close to the strike price, and when plenty of time remains.
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