Don and Tom take on the uncomfortable reality that even supposedly “rules-based” index investing is starting to look suspiciously active, as major indexes like the S&P 500 consider bending long-standing rules to admit massive IPOs like SpaceX earlier than before. They explain why changing index rules matters more than most investors realize, debate whether index committees are chasing performance to stay competitive with the QQQ, and argue that broad global diversification may be safer th...