Vega
Vega is the option Greek that estimates how much an option's price changes for a one percentage point (one volatility point) change in implied volatility, holding other inputs constant. Both calls and puts have positive vega when bought.
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Vega is the option Greek that estimates how much an option's price changes for a one percentage point (one volatility point) change in implied volatility, holding other inputs constant. Both calls and puts have positive vega when bought.