Rob Arnott chose Wall Street over astrophysics, built his career applying scientific method to markets, and coined the fundamental indexing revolution that now runs $150B+ in assets. He breaks down the hidden drag inside cap-weighted indices -- stocks get added after they soar and deleted after they crash -- and explains how RAFI's rebalancing alpha has beaten cap-weighted value in three out of four years over 20 years live. We dig into RAUS (fundamental selection, cap weighting, 99.9% correl...