仅包括跳跃或仅包括随机波动的模型对于股价和收益分布的描述不是很理想。研究了收益和波动中同时具有跳跃因子的连续时间随机波动模型。使用具有跳跃的连续时间随机波动模型分别对1996~1997年和2002~2004年两个时期我国股票市场的波动和跳跃进行分析,用MCMC算法估计模型的参数,结果表明,近年来我国股市的波动和跳跃较10年前有所减少。
Models with jumps or models with stochastic volatilities can not describe the distributing of stock price and return. In this paper we analyses Chinese stock market using the continuous-time stochastic volatility models with jumps in returns and volatilities. Estimating the model by MCMC and taking two examples based on 19964 1997 and 200242004 Shanghai Stock Exchange index. The results show that the volatilities and jumps in Chinese stock market now becomes small.