Implied volatility
The volatility figure that makes an options pricing model match the market price. The market's expectation of future movement.
Where it is explained in full
Options from the beginning: calls, puts, and the Greeks in plain words. What a contract actually is, what the numbers on the screen mean, and why an option's value before expiration is not the same as its payoff at expiration.
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Words beside it
- Volatility
How much something's price swings. Not the same as risk, but related.
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