Question: Use the information to calculate Variance and Standard Deviation ( apply n-1 as the denominator ([Note] Do not use excel function for this) for RIO

Use the information to
calculate Variance and Standard Deviation ( apply n-1 as the denominator ([Note] Do not use excel function for this) for RIO & BHP and Portfolio 1. Monthly Returns, Variance and Standard Deviation.
-Calculations Calculate Covariance between these two stocks over the sample period
Calculate Correlation between these two stocks over the sample period using the formula taught in class using monthly (not annual) figures.
Calculate the Optimal Weights of these two stocks using the formula taught in class, and subsequently the Minimum Variance Portfolio 1s (MVP 1) Return and Risk (standard deviation) based on the optimal weights using monthly (not annual) figures.
Calculate the Coefficient of Variations of RIO & BHP, Portfolio 1 and MVP 1 using monthly (not annual) figures.
If you can, please show your working and formula, many thanks!
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