The Nobel Prize-winning economist William Sharpe called it the golden rule of investing. Fellow Nobel laureate Harry Markowitz declared it "the only free lunch in finance." And financial historian and author Peter Bernstein described it as "the only rational deployment of our ignorance." What am I talking about? Diversification, the cornerstone on which every sound investment strategy is built. But what does a properly diversified portfolio look like? https://ifa.com/articles/what_should_diversi