new search; suggest new definition; Search for VEGA in Online Dictionary Encyclopedia Vega for a portfolio is the sum of the vegas of its constituents. The vega tends to decline closer to the expiry date of the contract. Options tend to be more expensive when volatility is higher. Main Page: investment, inventory, tax advisor, inventory control, business, finance, financial, credit, Definition of Vega. Vega is the sensitivity of an option’s price to changes in the volatility of the underlying asset. It is not necessary for the price of the underlying to change in order for the vega to change; only the expected volatility of the underlying needs to change. Click here for articles on vega. Vega definition is - the brightest star in the constellation Lyra. The option's vega is a measure of the impact of changes in the underlying volatility on the option price. Unfortunately, this is a very difficult parameter to measure. Vega. Vomma: The rate at which the vega of an option will react to volatility in the underlying market. Vega is the change in the value of the option with respect to change in volatility. showing only Business & Finance definitions (show all 6 definitions) Note: We have 10 other definitions for VEGA in our Acronym Attic. Nor … It is the second order derivative of the option value with respect to volatility. Example strategies with long vega exposure are calendar spreads & diagonal spreads. Vega is the greek metric that allows us to see our exposure to changes in implied volatility. Related Terms: Greeks When vega is large the security is sensitive to small changes in volatility. The prices and hedging strategies are only as good as the model for the underlying. Vega values represent the change in an option’s price given a 1% move in implied volatility, all else equal. Within the Greeks, in particular, option volatility greeks, Vega’s importance rises given how misunderstood the behaviour of volatility is. Long options & spreads have positive vega. Vega measures the sensitivity of the price of an option to a change by 1% of the volatility of the underlying asset. See also Greeks. Vega hedging . Specifically, the vega of an option expresses the change in the price of the option for every 1% change in underlying volatility. vega (Financial definition) iotafinance.com Also, the impact changes in volatility have on option prices. Miscellaneous Facts about Vega Vega is always positive, and, moreover, is the same value for puts as for calls; thus option prices always increase as the volatility does. The key parameter that determines the value of a contract is the volatility of the underlying asset. Of course, the vega of a short position is negative. The vega is calculated mathematically, and can be large in a new options contract. 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