急问：Beta到底是不是correlation coefficient?

waterline

thanks in advance!

ivanyeung

no

waterline

may I know the differences between the two? I checked and found the two formulas are the same.

 

see the link:

http://en.wikipedia.org/wiki/Correlation_and_dependence

weil

指的是CAPM里面的beta吗？如果是的话你需要好好看书

waterline

beta=Cov (1,2)/(SD1*SD2) isn it?

 

Anyone can help explain it rather than saying something meaningless? Sorry for saying like this, but to be the honest, I asked some questions and waited from the afternoon, no any usful responese yet...sort of annoyed...

 

Thanks a lot.

waterline

as my understanding, beta indicates the sensitive relations between two variables...correct me pls if I'm wrong.

88link88

beta=Cov (1,2)/(SD1*SD2) is wrong.

correlation coefficient=Cov (1,2)/(SD1*SD2)

beta=cov(1,2)/(SD2^2)=correlation coefficient*SD1/SD2

yuanfeng0331

不是

 

xnwqwm

不懂 不过一级里面只给了correlation coefficient=Cov (1,2)/(SD1*SD2) 的计算公式

 

Beta 没教计算公式 都是题目直接给出的

joynobel

88link88说的是对的
而且绝大部分情况下用到beta都是相对整个市场而言的，也就是为什么capm model里面会这么用