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How to calculate the standard deviation in the fund portfolio? What does the standard deviation mean?
1. Find the average income of each group first.

Calculation difference

Variance = weight of fund 65438 +0 * (income of fund 65438 +0- average income) 2+...+ weight of fund 7 * (income of fund 7-average income) 2

3. Variance is the standard deviation.

The standard deviation reflects the risk. The greater the standard deviation, the greater the risk.

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