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  • 學位論文

短期利率動態模型-偏態分配之實證研究

Modeling the dynamics of short-term interest rate volatility with skewed distributions

指導教授 : 李命志
共同指導教授 : 鄭婉秀(Wan-Hsiu Cheng)

摘要


本研究將一般短期利率模型中誤差項之常態分配換成SGED及skewed t,期望找出最佳實證配適效果。首先利用單因子CEV模型採用線性漂浮項,只考慮水準效果下,利率波動的敏感度無法正確捕捉序列相關的條件變異。接著使用間斷時間GARCH模型搭配非線性漂浮項,合併水準效果及GARCH效果於變異項後,大大降低了水準效果的參數估計值,因此認為單純考慮水準效果之利率模型對於解釋短期利率動態調整過程之波動性仍嫌不足,假設誤差項服從GED分配,並採用非線性漂浮項之GARCH模型,對於波動性的解釋及估計金融商品之相關議題更有助益。

關鍵字

單因子模型 水準效果 GARCH SGED

並列摘要


This paper estimates the generalized and nested models with SGED and skewed t distributions to determine the correct specification of the conditional distribution of short-term interest rates. First, the paper generalized the parametric models of short-term interest rate that nest one-factor CEV model with linear drift and level effect. Second, the paper nested the discrete-time GARCH models that incorporate the level and GARCH effects into the diffusion function. The empirical research points out that the significant parametric estimate reduces the level effect for the variance function. Moreover, the results can not fully capture modeling the dynamics of short-term interest rate volatility that only with level effect. Finally, the results also show that the significance of nonlinearity in the drift function relies crucially on the specification of the volatility function.

並列關鍵字

one-factor model level effect GARCH SGED

參考文獻


4.何怡諄,"台灣短期利率之不對稱動態擴散研究",民國94年6月,私立淡江大學財務金融學系金融碩士班碩士論文。
6.龍思筠,"短期利率動態調整之實證研究",民國96年5月,私立淡江大學財務金融學系碩士班碩士論文。
2.林長青、洪茂蔚、管中閔,"台灣短期利率的動態行為:狀態轉換模型的應用",民國91年,經濟論文,第30卷,第1期,頁29-55。
1.Ahn, D.H. and B. Gao, 1999, "A parametric nonlinear model of term structure dynamics", Review of Financial Studies, vol. 12, 721-762.
2.Aït-Sahalia, Y., 1996, "Testing continuous-time models of the spot interst rate", Review of Financial Studies, vol. 9, 385-426.

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