研究了具有固定敲定价格的几何型亚式期权在任意有效时刻的定价问题.根据高斯随机变量的和及其极限仍然服从高斯分布的性质,得出股票价格的几何平均值仍服从高斯分布,然后用鞅方法得出了几何型亚式期权在任意有效时刻的定价公式,而且最重要的是公式中反映了以前的市场信息.
This paper studies the pricing on Asian geometric average options with fixed strike price at any valid time. Because the sum and the limit of Gauss random variables series have the Gauss distributions, the geometric average price of stocks has the same distributions.Finally, we draw the price formula of the Asian geometric average options at any valid time. The formula reflects the information which we have known.