RSP’s Equal-Weight Trap: How a $10,000 Investment Lost $27,800 to Fees and Rebalancing Drag Over a Decade

If you bought Invesco S&P 500 Equal Weight ETF (NYSEARCA:RSP) to diversify away from the “Magnificent Seven,” congratulations: you got the diversification. You also got a fee stack, a cash pile, and a rebalancing engine that has quietly cost long-term holders tens of thousands of dollars against a plain vanilla S&P 500 fund.

What You’re Actually Paying

RSP’s expense ratio sits at roughly 0.20% a year. On a $10,000 position, that is about $20 annually. Sounds trivial. It isn’t, because the cheapest cap-weighted mirror charges a fraction of that. Vanguard S&P 500 ETF (NYSEARCA:VOO) carries a net expense ratio of 0.03%, or $3 a year per $10,000. That is a fee gap that compounds every single year you hold the fund.

Fees are the visible cost. The invisible one is the return gap. Over the past five years, RSP returned 53.18%. VOO returned 86% over the same window. Over ten years, RSP delivered 206.76% versus VOO’s 314.79%. A $10,000 stake in each on July 12, 2016 ended up in very different places by July 10, 2026, and the fee sheet only explains a sliver of the gap.

The Part the Factsheet Doesn’t Highlight

Start with cash drag. As of April 30, 2026, RSP held three short-term investment vehicles totaling roughly $3.59 billion, about 4.09% of net assets. That is billions of dollars sitting in money market sleeves inside an equity fund. In a rising market, cash lags stocks. That drag is not in the expense ratio.

Next, rebalancing. RSP holds 508 positions and resets them toward equal weight every quarter. Every reset means selling winners and buying laggards across hundreds of names, which creates turnover, transaction cost, and taxable capital gains for investors in taxable accounts. The equal-weight mandate is also loose in practice. On the same date, Intel sat at 0.378% of net assets while Alphabet sat at just 0.106%. You are paying for equal weight and getting position sizes that drift between rebalances.

Then there is the structural underweight to mega-caps. When Apple, Microsoft, NVIDIA, and Alphabet lead the market, RSP structurally can’t keep up. That showed up in the one-year comparison: RSP gained 17.25% in the year ending July 10, 2026, while VOO gained 22.04%. That is nearly five percentage points of forgone return in a single year on the exact same 500 companies.

The Cheaper Mirror

The direct cap-weighted alternative is VOO at 0.03%. iShares Core S&P 500 ETF (NYSEARCA:IVV) plays the same role at a similarly low fee. The trade-off is real: you accept mega-cap concentration, and if leadership finally rotates to the average stock, RSP could lead. RSP has actually done that in 2026 so far, up 12.78% year to date versus VOO’s 11.32%. Six months of leadership, though, has not closed a five- or ten-year gap.

What This Means for You

RSP is an active bet on the average S&P 500 stock. You are paying a premium fee, tolerating a cash sleeve, absorbing quarterly turnover, and taking a structural underweight to the market’s biggest winners, in exchange for exposure to the average S&P 500 stock. That bet has paid in 2026 and cost dearly over the past decade. The question worth asking before the next contribution: are you buying RSP because you have a specific view on mega-cap valuation, or because “equal weight” simply sounded safer than the index it tracks? Those are very different investments with the same ticker.

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