CISI level 3 Certificate in Wealth & Investment Management ICWIM Question # 59 Topic 6 Discussion

Standard deviation measures the dispersion of returns around the average (mean) return. A higher standard deviation indicates greater historical volatility, showing how much the returns deviate from the expected average.

Formula:

Standard Deviation=Σ(Ri−Rˉ)2n\text{Standard Deviation} = \sqrt{\frac{\Sigma (R_i - \bar{R})^2}{n}}Standard Deviation=nΣ(Ri​−Rˉ)2​​

Where:

RiR_iRi​ = Individual returns

Rˉ\bar{R}Rˉ = Mean return

nnn = Number of data points