參考這兩篇吧,如果還不清楚,google一下 "除權除息後的股價計算" 就有一堆資訊http://ccchiu.pixnet.net/blog/post/29259833-%E9%99%A4%E6%AC%8A%E9%99%A4%E6%81%AF%E5%8F%83%E8%80%83%E5%83%B9%E5%A6%82%E4%BD%95%E8%A8%88%E7%AE%97%EF%BC%9Fhttp://www.wowgood.org/2010/07/blog-post.html