I am getting the same output(returns, risk, sharpe ratio, optimal weights) for various target returns. I am evaluating the portfolio optimization spreadsheet during the trial period. Is there a restriction on how many times I run optimization during evaluation period.
We are likely to get similar results based on the returns and variance of each asset. Using the Sortino ratio accounts for downside deviation below the target return on each asset while the Sharpe ratio uses overall standard deviation.
We can also change weighting constraints to model different scenarios and there no no limits to how many optimizations which can be run.