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Essays on Applications of the Factor Model
Estimating the volatilities and correlations of asset returns plays an important role in portfolio and risk management. As of late, interest in the estimation of the covariance matrix of large dimensional portfolios has increased. Estimating large dimensional covariance poses a challenge in that the cross-sectional dimension ...
Essays on Financial Econometrics
This dissertation studies the U.S. stock market. The first chapter explores a four-moment CAPM under regime switching which incorporates the risk premia for skewness and kurtosis. As expected, estimates of risk premia for covariance, co-skewness and co-kurtosis risks are different across regimes. By allowing time-varying ...
Jump Variation in High-Frequency Asset Returns: New Estimation Methods
A large literature has emerged in the last 10 years using high-frequency (intraday) asset returns to estimate lower-frequency phenomena, several of which being conditional daily return variance and its components jump variation and integrated variance. We propose several new estimators of jump variation and integrated variance. ...