Is Equal-Weighting the S&P 500 Worth It? Here’s What the Data Says

1 hour ago 1

Tony Dong

Sun, July 26, 2026 astatine 3:02 PM CDT 5 min read

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Equal weighting reduces concentration: RSP gives each S&P 500 banal the aforesaid allocation, reducing exertion vulnerability portion expanding weights successful sectors specified arsenic industrials, financials, and utilities.
The show vantage hasn't materialized: Over the past 23 years, SPY somewhat outperformed RSP portion besides delivering little volatility and amended risk-adjusted returns.
Higher costs and turnover matter: Equal weighting requires continual rebalancing and charges a higher disbursal ratio, making it hard to warrant unless reducing attraction hazard is your superior objective.
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The top-heavy quality of the SPDR S&P 500 ETF Trust (SPY) has go 1 of ETF investor's biggest talking points. With a fistful of mega-cap exertion companies accounting for an progressively ample stock of the index, galore investors person started looking for ways to trim attraction hazard without abandoning the S&P 500 altogether. That's helped substance renewed involvement successful alternate indexing approaches. Low-volatility ETFs person seen a resurgence, dividend ETFs person regained popularity, and different strategy attracting attraction is adjacent weighting.

A woody artifact displaying 'S&P500' successful achromatic substance is positioned connected apical of assorted stacks of shiny metallic and golden coins, arranged successful an ascending signifier from near to right. A integer candlestick chart, with greenish and reddish bars indicating marketplace fluctuations, is overlaid connected the coins and the achromatic background. Numerical values ranging from 729500.00 to 733500.00 are disposable connected the acold right, representing information points connected the chart.

The Invesco S&P 500 Equal Weight ETF (RSP) does precisely what its sanction suggests. Rather than allowing the largest companies to predominate the portfolio, each banal successful the S&P 500 receives the aforesaid allocation of astir 0.2%, with the portfolio rebalanced quarterly to reconstruct those adjacent weights. On paper, the thought is compelling. You inactive ain each 500 companies successful the S&P 500, but without relying truthful heavy connected a fistful of mega-cap stocks to thrust returns. There is surely immoderate information to that benefit.

Equal weighting comes with trade-offs that often person little attention. Over much than 2 decades, those trade-offs person mostly resulted successful little returns, higher volatility, and higher costs than simply owning the accepted market-cap-weighted S&P 500.

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What Equal-Weighting the S&P 500 Actually Does

RSP's portfolio looks noticeably antithetic from SPY contempt owning the aforesaid underlying companies. The biggest differences look astatine the assemblage level. Compared with the accepted S&P 500, RSP is overweight industrials by astir 7%, existent property by 4%, utilities by 3.3%, materials by 3%, financials by 2.6%, healthcare by 2%, user staples by 1.8%, and vigor by 0.4%. It is underweight user discretionary by 0.2%, connection services by 6.5%, and accusation exertion by a important 18.4%.

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