Sound Investing

Can You Trust the Market? Equal-Weighted S&P 500 vs. Four-Fund Strategy


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In this week’s episode, Paul Merriman shares lessons from a lifetime of investing—prompted by conversations with students, longtime collaborator Rich Buck, and questions from new investors about trust and risk.

Paul dives deep into the data behind his favorite long-term strategies, including the equal-weighted S&P 500 and the classic Four-Fund Portfolio, comparing 25-year results across multiple time periods.

He explains why no one can predict short-term returns, but how history can still guide your long-term strategy. Using decades of data, Paul shows how diversification across size and value has rewarded disciplined investors—even when recent performance has lagged.

Referenced Tables & Data:

  • 40-Year Returns (1928–2024): S&P 500 best 12.5% / worst 8.9%

  • 25-Year Periods (1950–1974, 1975–1999, 2000–2025)

  • Equal-Weighted S&P 500 (VADDX/RSP) vs. Cap-Weighted (VTSAX, S&P 500)

  • DFA Small Cap Value (DFSVX and DFFVX)vs. Russell 2000 Small Cap Value (IWN)

  • Four-Fund Portfolio (S&P 500, Large Cap Value, Small Cap Blend, Small Cap Value)

  • Two-Fund Portfolio (S&P 500 + Small Cap Value)

From 2000–2025, the S&P 500 compounded at 8.3%, while the equal-weighted version earned 9.9%, and small-cap value reached 11.1%. Paul explains why this premium persists and why patience—backed by data—is an investor’s greatest advantage.

Full tables and charts available at PaulMerriman.com 

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Sound InvestingBy Paul Merriman

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