The formula for the variance of a 2-stock portfolio is:
s2 = [WA2σA2 + WB2σB2 + 2WAWBσAσBrA,B]
Since σAσBrA,B = CovA,B, then
s2 = [(0.72 × 0.552) + (0.32 × 0.852) + (2 × 0.7 × 0.3 × 0.09)] = [0.1482 + 0.0650 + 0.0378] = 0.2511.
微信号：gaoduntiku
合作账户登录：
账户名：
密码：
关注官方微信
微信号:gaoduneclass
高顿网校
售前咨询(9:00-21:00)
400-168-8811
在线客服点击咨询
售后咨询(9:00-21:00)
021-31068088
fankui@gaodun.com
微信扫一扫实时资讯全掌握
Copyright © 2006- 高顿网校, All Rights Reserved.
