A Theory of Volatility Spreads
Management Science · 2006 · Volume 52 · Issue 12
Abstract
This study formalizes the departure between risk-neutral and physical index return volatilities, termed volatility spreads . Theoretically, the departure between risk-neutral and physical index volatility is connected to the higher-order physical return moments and the parameters of the pricing kernel process. This theory predicts positive volatility spreads when investors are risk averse, and when the physical index distribution is negatively skewed and leptokurtic. Our empirical evidence is supportive of the theoretical implications of risk aversion, exposure to tail events, and fatter left-tails of the physical index distribution in markets where volatility is traded.
Keywords
risk aversion, physical return moments, pricing kernel, risk-neutral volatility, volatility spreads, spanning risk-neutral moments
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