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Implied Volatility
Options
どういう意味か
The market's expectation of how much the underlying asset will move over the life of the option. High implied volatility means options are more expensive (higher premiums) because large price swings are expected, while low implied volatility means options are cheaper. Implied volatility is derived from the option's current market price, not from the underlying's actual price movements.
例
Before a company reports earnings, implied volatility for its options often rises because the market expects a large price move. A call option might cost $5 per share before earnings, compared to $2 per share after earnings are released and the price move is confirmed.
初心者がよくやるミス
Beginners buy options when implied volatility is very high, then lose money even if the underlying moves in their direction because the sharp drop in implied volatility after the event (like earnings) reduces the option's value more than the underlying move increased it.
関連用語
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