Models with jumps or models with stochastic volatilities can not describe the distributing of stock price and return. 僅包括跳躍或僅包括隨機波動的模型對於股價和收益分佈的描述不是很理想。
This paper deals with the equivalent martingale measures for the stochastic volatility model. 摘要研究了隨機波動率模型的等價鞅測度。