Today, the top 10 companies in the S&P 500 Index account for more than 33% of the index. That's the largest concentration we've seen in 50 years. In this video we'll cover three things:1. Just how significant is the concentration?2. Does it tell us anything about future returns?3. What, if anything, should we do about the concentration.Join the Newsletter. It's Free:https://robberger.com/newsletter/?utm...