The idea of constructing this portfolio doesn't probably make a whole lot of sense because they have different volatility and return characteristics that you want to balance out. None of what is going on here should surprise this author, Brett Arons, who's been writing articles for, I don't know, decades now. A lot of them are quite facile like this one. Stupid as stupid does, Mr Blow. And do not answer the basic questions as to why portfolios like this tend to perform better than simple stock bond portfolios.