Exercise

The GMV portfolio

The global minimum volatility portfolio, or GMV portfolio, is the portfolio with the lowest standard deviation (risk) and the highest return for the given risk level.

Returns are very hard to predict, but volatilities and correlations tend to be more stable over time. This means that the GMV portfolio often outperforms the MSR portfolios out of sample even though the MSR would outperform quite significantly in-sample. Of course, out of sample results are what really matters in finance.

Instructions

100 XP

Sort RandomPortfolios with the lowest volatility value, ranking in ascending order.
Multiply GMV_weights_array across the rows of StockReturns to get weighted stock returns.
Finally, review the plot of cumulative returns over time.