用公式算

来源: 于 2007-12-25 22:37:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

就是简单的初中数学， weight * Standard deviation。但是我感觉不对，比如黄金的mutual fund has little relation with stock. but when you calculate with the above formula. It seems not making sense.