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Results of search for vega follow:
vega:
As used with respect to options: "The vega of a portfolio of derivatives
is the rate of change fo the value of the portfolio with respect to the
volatility of the underlying asset." -- Hull (1997) p 328.
Formally this is a partial derivative.
A portfolio is vega-neutral if it has a vega of zero.
Source: Hull, 1997, p 328
Contexts: finance
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