The article discusses different ways to choose investments for a portfolio. Traditional methods focus on minimizing risk and maximizing return. Newer methods, like Post Modern Portfolio Theory, consider only the downside risk. This means they focus on avoiding losses rather than just seeking gains. These methods use measures like Value-at-Risk and Conditional Value-at-Risk to make investment decisions. Overall, the article explores how portfolio selection has evolved from focusing on risk and return to also considering how investors feel about the outcomes.