摘要
在Vasicek模型的基础上加入制度转换因素,研究制度转换是否能对模型的修正起帮助作用。结果显示,制度转换能够捕捉到利率变动中的大部分异方差现象。在中国金融市场上单制度模型的建模能力是远远不够的,但仍有一部分异方差现象不能由制度转换所解释。因此,在加入制度转换的同时,还须对短期利率的波动项进行更丰富的参数设置。
A regime-switching Vasicek model is developed. The result shows that regime-switching is an important component for improving the model and can capture much of the conditional heteroskedasticity. And the single-regime model does a poor job of modeling the volatility of short-term interest rates. But regime-switching alone is insufficient to account for the conditional heteroskedasticity in the short rate. So a regime-switching model with richer parameterization of the conditional variance within each regime is needed. These and other related issues are currently being explored in ongoing research.
出处
《科学技术与工程》
2004年第9期798-803,共6页
Science Technology and Engineering
基金
国家自然科学基金(79970015
70142015)
教育部博士点专项科研基金(20020532005)
全国高校青年教师奖励基金资助
关键词
利率期限结构模型
制度转换
VASICEK模型
极大似然估计法
models of the term structure of interest rates regime-switching Vasicek model maximum likelihood estimation