
I joined my longtime friend Tom Cock for a special edition of Talking Real Money — a wide-ranging conversation about the evolution of indexing, the proposed changes to the S&P 500, and why investors should understand both the strengths and limitations of traditional index funds. I explain why firms like Dimensional Fund Advisors and Avantis Investors use a more flexible, evidence-based approach than traditional indexing, and how academic research has reshaped portfolio construction over the past several decades.
We also explore lessons from market history, including the importance of understanding major bear markets, determining appropriate risk levels, and building portfolios that align with your personal goals rather than chasing maximum returns. I share insights from the latest Dimensional Matrix Book and explain why I believe studying 100 years of market data helps investors stay disciplined during inevitable downturns.
Finally, I introduce a simple but powerful strategy for helping newborns and young children build substantial retirement wealth through small annual investments that can compound over many decades.
CHAPTERS0:11 Special guest Paul Merriman joins Talking Real Money0:55 Long friendship and investing partnership between Tom and Paul1:20 S&P 500 rule changes and earlier inclusion of major IPOs like SpaceX2:07 Historical examples of S&P 500 additions and omissions2:35 Microsoft’s delayed entry into the S&P 5002:56 NVIDIA replacing Enron in 20013:29 How index rule changes can affect future returns and volatility4:08 Why indexing remains the preferred strategy for most investors5:16 Traditional versus non-traditional index funds6:37 How Avantis and Dimensional incorporate factors beyond company size8:05 Why factor-based investing differs from traditional indexing9:02 Problems with rigid index reconstitution schedules10:16 Momentum, flexibility, and portfolio management advantages11:22 Introduction to Dimensional’s annual Matrix Book11:53 Using market history rather than forecasts to guide investing decisions13:09 Lessons from past bubbles, crashes, and lost decades14:20 Why Paul trusts academic research more than Wall Street forecasts15:14 The case for small-cap value investing15:49 Clarifying Paul’s allocation to small companies16:53 Investing for heirs, charities, and future generations18:10 Remembering investor panic during the 2008 financial crisis19:18 Determining an appropriate risk level for retirement portfolios20:43 Different investor goals: beating the market, maximizing returns, or minimizing risk21:28 Peace of mind versus maximum growth21:55 Helping young people build retirement wealth early22:54 The $365-per-year retirement funding concept24:09 Final thoughts and appreciation between Tom and Paul