No. of Recommendations: 5
I had Perplexity summarize the video:
Ben Felix argues that equal weight index funds mostly repackage small/value tilts in a clunky way, and that you can get similar factor exposure more efficiently with smarter implementation.
Core idea
Market-cap-weighted indexes let the market set each stock’s weight, require little rebalancing, and avoid making active bets on individual stocks or sectors.
Equal weight indexes give every stock the same weight, which reduces concentration in mega-caps and has historically outperformed cap-weighted indexes largely because it tilts toward smaller and cheaper stocks.
Risks and costs of equal weight
Equal weight portfolios end up with big overweights to small companies and underweights to large ones, which increases volatility and exposure to riskier small and value stocks.
They also create large sector over‑ and underweights (for example, underweight tech, overweight industrials), effectively turning them into an active sector bet that is hard to justify ex ante.
Maintaining equal weights requires frequent rebalancing; the S&P 500 equal weight ETF has had turnover more than 10 times higher than a cap-weighted S&P 500 ETF, adding trading costs.
Momentum problem
Equal weighting is structurally a negative momentum strategy: it systematically sells recent winners and buys recent losers at each rebalance.
Factor regressions show the S&P 500 equal weight fund loads positively on size and value but negatively on momentum, and all of these exposures are statistically significant.
Performance context
Over live data since 2003, the Invesco S&P 500 Equal Weight ETF has only slightly outperformed the S&P 500, and over 2005–present both the equal weight ETF and Dimensional US Core Equity 1 trail a standard S&P 500 ETF because large growth stocks did very well.
In backtests from 1971, equal weight looks very strong, but that period was favorable for small and value stocks, and the outperformance is explained by those factor tilts plus a drag from negative momentum, not by “equal weighting magic.”
Why he prefers alternatives
Dimensional’s US Core Equity 1 strategy targets similar small and value exposures but: limits sector deviations from the market, avoids trading against momentum, starts from market-cap weights, and keeps turnover modest.
Factor regressions show Dimensional’s fund has similar small/value tilts to S&P 500 equal weight but without a strong negative momentum load, and historically it has beaten the equal weight fund with lower volatility while still lagging the pure S&P 500 in a large‑growth‑led era.
His takeaway: if you want to tilt toward smaller and cheaper stocks to address concentration and valuation worries, it is more efficient to use a fund that intentionally implements those tilts (like Dimensional) rather than a naive equal weight index with extra risk, turnover, and a structural bet against momentum.
