hirobank

I saw a similar bug [https://github.com/robertmartin8/PyPortfolioOpt/issues/436](https://github.com/robertmartin8/PyPortfolioOpt/issues/436). Unfortunately, when I changed it into **ef = EfficientFrontier(cur_ret, shrink_cov, solver_options={"warm_start":False})** there were still numerous bugs.

Hi there, I found the problem was caused by the wrong usage of mean-variance function. According to the document, the function should be max_quadratic_utility(). Thank you for supporting.

> Hi mthelee, Sorry for the late reply. I am happy to provide an example for you. Basically, I put the below part into my code to run FOUR optimisations...