John Del Vecchio explains how market capitalization weighted investing can systematically push investors toward the market’s most expensive companies. Using decades of market history, the paper argues that buying yesterday’s biggest winners has often led to disappointing long term outcomes, challenging one of investing’s most widely accepted approaches.
The Trillion Dollar Mistake: Why The Allocation in Portfolios to The S&P 500 is Sub-optimal and what to do about it
John Del Vecchio
Research
6 Pages
Key Takeaways
Size Can Mislead: The largest U.S. company underperformed the broader market in 24 of 30 historical observations after reaching the top market capitalization ranking.
Valuation Matters: Several former market leaders lost 50%+ of their value after peaking, illustrating how popularity and valuation often move together at market extremes.
ndexing Tradeoff: Market cap weighted indexes automatically allocate the largest weights to the most expensive companies, creating a structural bias that the paper argues investors should recognize.
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