Portfolio Optimization

https://medium.com/python-data/effient-frontier-in-python-34b0c3043314

https://medium.com/python-data/efficient-frontier-portfolio-optimization-with-python-part-2-2-2fe23413ad94

https://medium.com/the-trading-scientist/portfolio-optimization-in-r-using-a-genetic-algorithm-8726ec985b6f