Rick Ferri has a new book coming out that I can’t wait to read. In the meantime, here’s something he put together illustrating the three costs that investors must control if they’re going to be successful…

Figure 1: The Investment Cost Triangle with Components

Some costs in Figure 1 are easy to identify and quantify while others are not. Structural costs are generally available because most fund fees and expenses are required to be disclosed by law. However, tax costs are more difficult in that they have to be extracted from tax return data. Behavioral costs are the most elusive and difficult to quantify because there’s very little data available. It also doesn’t help that human beings are overconfident and don’t want to be reminded of behavioral shortcomings.

Read the rest, this is the important stuff – much more important than the latest macro opinions on Greece or Guernica.