Research

Research Interests

  • Empirical Asset Pricing
  • Empirical Option Pricing
  • Financial Econometrics
  • Risk Management
  • Portfolio Choice

Working Papers

Option-implied Idiosyncratic and Systematic Risk in the Cross-section of Expected Stock Returns, Job Market Paper, Nov. 2015
Abstract: I introduce a model-based approach to estimate higher order idiosyncratic moments and co-moments (co-skewness and co-kurtosis) of individual equities exclusively from the cross-section of option prices, including the full spectrum of available maturities and strike prices. These estimates are forward-looking and can, thus, be interpreted as truly ex-ante conditional measures of risk. Using standard cross-sectional asset pricing tests, I show that ex-ante moments help explain the cross-section of expected stock returns beyond traditional asset pricing factors, firm characteristics, and ex-post measures of moments. Specifically, I find that idiosyncratic volatility, idiosyncratic skewness and co-skewness are significantly negatively related to expected returns, while co-kurtosis shows a significantly positive relationship. Ex-ante moments are economically significant. A one-standard-deviation increase in idiosyncratic volatility, for example, leads to a 4.44% drop in annual expected returns.
Presented at: The Society for Financial Econometrics Summer School at the Harvard Deparment of Statistics; Stockholm School of Economics; Stockholm Business School; Sveriges Riksbank; National PhD Workshop in Finance, Swedish House of Finance.

Option Pricing with Stochastic Conditional SkewnessNov. 2015
Abstract: I develop an affine discrete time multivariate stochastic volatility model. The model allows for the leverage effect and time-varying conditional skewness. I show that this model keeps the same structure under the risk-neutral measure, which yields semi-closed form option prices. The flexibility of the model allows idiosyncratic or common shocks (or factor innovations) to drive a specific group of assets, as well as a particular asset being driven by one or several idiosyncratic shocks (or factor innovations). In a particular specification, I introduce a model for pricing individual equity options that allows for time-varying market betas and stochastic higher order moments. Finally, I show that this model provides a good fit of the option data for the S&P500 and a large cross-section of companies during the period of 1996 to 2012.
Presented at: The Society for Financial Econometrics Summer School at the Harvard Deparment of Statistics; Stockholm School of Economics; PhD Nordic Finance Workshop, Aalto University.


Work In Progress

Market Downside Volatility, Upside Potential, and Strategic Asset Allocation
(joint with Roméo Tédongap)

Asset Pricing with Stochastic Conditional Skewness  (joint with Roméo Tédongap)