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Essays On Financial Return And Volatility Modeling, Jing Wu

Electronic Thesis and Dissertation Repository

My dissertation consists of three essays focusing on modeling financial asset return and volatility.

The first essay proposes a threshold GARCH model to describe the regime-switching in volatility dynamics of financial asset returns. In the threshold model the switching of regimes is triggered by an observable variable, while volatility follows a GARCH process within each regime. We establish theoretical conditions, which ensure that the return process in the threshold model is strictly stationary, as well as conditions for the existence of finite variance and fourth moment. A simulation study is further conducted to examine the finite sample properties of the …