This week you will learn how to choose an efficient portfolio, among other things. However, as you know from the book, like much else in finance, this is also a topic that is subject to sharp debates and disagreements. In recent times some experts have proposed a few novel ways of selecting a portfolio of assets. The following NYT article discusses "four" such "new investment models."

http://www.nytimes.com/2014/07/19/your-money/investment-portfolio-philosophies.html

Read the article and comment on the models discussed here. Based on this week's lesson and your own research which of these models would you choose and why? Or would you prefer any other model/approach that you are aware of?