The Factor Structure in Equity Options
88 Pages Posted: 25 Feb 2013 Last revised: 14 Sep 2016
Date Written: September 13, 2016
Equity options display a strong factor structure. The first principal components of the equity volatility levels, skews, and term structures explain a substantial fraction of the cross-sectional variation. Furthermore, these principal components are highly correlated with the S&P500 index option volatility, skew, and term structure respectively. We develop an equity option valuation model that captures this factor structure. The model predicts that firms with higher market betas have higher implied volatilities, steeper moneyness slopes, and a term structure that co-varies more with the market. The model provides a good fit and the equity option data support the model’s cross-sectional implications.
Keywords: factor models, equity options, implied volatility, option-implied beta
JEL Classification: G10, G12, G13
Suggested Citation: Suggested Citation