About this episode

Paul Merriman debates Rick Ferri on the merits of total market portfolios versus factor tilting for better diversification and long-term returns.

This Friday I'm sitting down with my friend Rick Ferri for a debate that I think matters a great deal, even though — or maybe because — Rick and I agree on almost everything. We both believe in diversification, low costs, index funds, ignoring predictions, and staying the course. Where we part ways is what happens after that. Rick's case is that you should simply own the whole market. A total stock market index fund gives you thousands of companies at an extraordinarily low cost, and adding complexity rarely pays. My case is that the academic research — Fama, French, and decades of market history — shows that greater exposure to small and value companies may raise long-term expected returns. Rick calls that factor tilting. I call it better diversification. He'll argue I'm not adding diversification at all, just changing the weights, and he's right that this is exactly what we're doing. The question is whether it's worth doing. We also take on a second question that gets far too little attention: if you do want small and value exposure, where should you get it? Vanguard, Fidelity, DFA or Avantis — traditional indexing or systematic portfolio management? Differences that look…

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