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CFA Level 3
Topic: Equity Portfolio Management
Reading: Active Equity Investing: Portfolio Construction
Correction:
At time 11:00, I calculated the contribution of Asset B to total variance as 0.5165 (as I rounded the covariances to 4 decimal places). From 12:41 onwards, in the video I used the contribution of Asset B to total variance as 0.5175 (this was because I used all the decimal places in the covariances, not shown here). For purpose of exam, stick to 0.5165.
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When you have a portfolio of n-assets, we use the absolute risk attribution to estimate the contribution of each asset to the portfolio variance. We use a 3-asset portfolio to illustrate the calculation of:
1) variance and covariance terms of each asset.
2) contribution of each asset to the total portfolio variance.
3) the %contribution of each asset to the total portfolio variance.
4) the portfolio standard deviation.
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