#reading-9-probability-concepts
To calculate the variance of return on a portfolio of n assets, the inputs needed are the n expected returns on the individual assets, n variances of return on the individual assets, and n(n − 1)/2 distinct covariances.
If you want to change selection, open document below and click on "Move attachment"
Summary iable with itself is its own variance.
Correlation is a number between −1 and +1 that measures the co-movement (linear association) between two random variables: ρ(R i ,R j ) = Cov(R i ,R j )/[σ(R i ) σ(R j )].
<span>To calculate the variance of return on a portfolio of n assets, the inputs needed are the n expected returns on the individual assets, n variances of return on the individual assets, and n(n − 1)/2 distinct covariances.
Portfolio variance of return is σ2(Rp)=n∑i=1n∑j=1wiwjCov(Ri,Rj)σ2(Rp)=∑i=1n∑j=1nwiwjCov(Ri,Rj) .
The calculation of covariance in a forward-looking sense Summary
| status | not read | | reprioritisations | |
|---|
| last reprioritisation on | | | suggested re-reading day | |
|---|
| started reading on | | | finished reading on | |
|---|
Details