本文使用利率仿射模型计算出先验的国债利率期限溢酬,并和后验信息法进行对比、分析,发现由于存在着较大的估计误差,传统使用的后验信息法只能得到超额收益率,而使用先验信息法计算出的才能代表投资者当期对国债投资风险的无偏估计。我们也发现,在2005-2008年的不同时期,期限溢酬对长期利率变动的影响不同,而且交易所市场对银行间市场有引导作用。
This paper uses a three-factor affine term structure model to estimate the ex-ante term premium. This shows that term premiums affect term structure variously at different periods. Comparing to ex-post premium, ex-ante premiums is the better proxy for interest rate risk premium due to estimating errors in ex-post method. This paper also shows inter-bank market investors' estimations are led by the latter' exchange market investors'.