以Bibby与S(o)rensen(1997)抛物线扩散模型为基础,用一个线性趋势和跳跃加上一个扩散过程为资产价格对数建模,该扩散过程是一个漂移项为0、扩散系数依赖与瞬时的资产价格,该模型称之为抛物线跳跃扩散模型.通过模型成功的拟合了几个不同价格指数数据集合,表明抛物线扩散跳跃模型能够很好的体现资产收益分布的检验特征.开发了基于Milstein的McMC算法,成功的估计了模型的参数及隐含变量,并验证了所开发算法的有效性.
Based on Bibby and Sorenzen' s Hyperbolic Diffusion model (HYD), we model the log-price as a deterministic linear trend and jumps plus a diffusion process with drift zero and with a diffusion coefficient (volatility) which depends in a particular way on the instantaneous asset price. We name the model Hyperbolic Jump- Diffusion model(HJD). It is shown that the model possesses a number of properties encountered in empirical studies of asset prices. The model is rather successfully fitted to different price index data sets. We proposed a McMC method to estimation parameters and implied variables, the McMC method based on the Milstein scheme.