The persistent gap between implied volatility (what option buyers pay) and subsequently realised volatility (what markets deliver). Harvesting it is the insurance business of markets — steady premiums, occasional catastrophe. See the volatility page.
Where Volatility risk premium is explained in depth
The definition above is the short version. These pages put it to work, in the order they use it most:
Information and education only. Every page, figure and
calculator on this site exists to explain how financial instruments work. Nothing here is
investment, tax or legal advice, a recommendation, or a valuation you can rely on.Full disclaimer