Historically, a portfolio built this way has reduced risk significantly, while still producing total returns that come surprisingly close to the S&P 500. Here is how the strategy works and some ETFs you can buy to put it in play.Instead of relying on complex strategies or expensive hedge funds, it combines a handful of simple, durable building blocks designed to hold up across different economic conditions. The best part is that it only requires five low cost ETFs, each with an expense ratio below 0.1%.The ...