The S&P 500 you own through a standard index fund is not as diversified as it looks. The cap-weighted version of the index hands roughly a third of your money to a handful of mega-cap technology names, meaning five or six companies effectively drive your returns. Equal-weight ETFs fix that by giving every holding an identical slice of the portfolio, regardless of size. The result is a fundamentally different exposure profile — one that is drawing renewed attention in 2026 as mega-cap dominance has started to fade.
SPY, the standard cap-weighted S&P 500 ETF, is down about 4% year-to-date. The three equal-weight funds covered here have all held up better over that same stretch, which illustrates exactly why investors reach for this structure when concentration risk becomes a concern.
RSP: The Equal-Weight Benchmark
Invesco S&P 500 Equal Weight ETF (NYSEARCA:RSP) is the defining fund in this category. With $90.7 billion in assets under management and an inception date of April 24, 2003, it has more history and more liquidity than any competitor. That scale matters for investors who want to move in and out of a position without meaningful slippage.
The mechanism is straightforward: RSP holds all 500 S&P 500 constituents at roughly equal weight, around 0.2% each, and rebalances quarterly. NVIDIA, Apple, and Microsoft each sit at less than 0.2% of the portfolio, the same weight as a mid-sized industrial or regional bank. That quarterly rebalance is a built-in discipline — it systematically trims winners that have run up and adds to laggards that have pulled back, a mechanical value tilt embedded in the structure itself.
The sector allocation reflects this: Industrials leads at 16.1%, followed by Financials at 13.5% and Information Technology at 13.4%. In the cap-weighted S&P 500, Technology dominates at roughly a third of the index. RSP’s more balanced spread means its performance is driven by the broader economy, not just a few platform businesses.
RSP is up about 1% year-to-date and has returned about 11% over the past year, both figures ahead of SPY’s cap-weighted equivalent over the same periods. The expense ratio is 0.2% and the dividend yield sits at 1.57%. The tradeoff is that RSP will lag when mega-cap growth is driving the market — as it did during stretches of 2023 and 2024 when a narrow group of AI-linked names powered the index.
EQL: Equal Weight at the Sector Level
Alps Equal Sector Weight ETF (NYSEARCA:EQL) takes a different approach to the same problem. Rather than equalizing at the stock level, it equalizes at the sector level — each of the 11 GICS sectors receives an equal allocation, and then holdings within each sector are weighted by market cap.
The practical result is meaningful. EQL holds the eleven Select Sector SPDR ETFs as its underlying positions, with Energy (XLE) at roughly 11.7%, Utilities (XLU) at 9.7%, and Materials (XLB) at 9.4% among the largest allocations. Energy and Utilities, which together represent a small fraction of the cap-weighted S&P 500, each get roughly the same weight as Technology or Financials. That is a meaningful structural tilt toward sectors that have historically offered inflation protection and income.
Within each sector, though, the largest companies still dominate. That means you get the mega-caps — Apple in Technology, JPMorgan in Financials, UnitedHealth in Healthcare — but none of them can overwhelm the portfolio because their sectors are capped at equal weight. It is a hybrid: sector-level democracy with within-sector hierarchy preserved.
EQL is up about 3% year-to-date and has returned about 14% over the past year, the strongest recent performance of the three funds covered here. The fund carries $667 million in assets and a 0.27% expense ratio, making it the smallest and least liquid of the group. The dividend yield is 1.58%. Investors who value sector balance over individual stock balance will find this structure more intuitive, but they should be aware that thinner liquidity can mean wider bid-ask spreads on active trading days.
EQWL: Equal Weight Among the Mega-Caps
Invesco S&P 100 Equal Weight ETF (NYSEARCA:EQWL) occupies a distinct niche. It applies equal-weight logic not to the full S&P 500 but to the S&P 100, which is the 100 largest companies in the index. The result is a fund that still holds the biggest names in American business — every mega-cap technology company, major bank, and pharmaceutical giant — but refuses to let any one of them dominate.
This matters because the S&P 100 in cap-weighted form is even more concentrated than the full S&P 500. The top five or six names account for a disproportionate share. EQWL strips that concentration out while keeping the quality filter intact. You are not reaching down into smaller companies the way RSP does — every holding is a large or mega-cap name with deep liquidity and institutional coverage.
The fund’s top holdings cluster around 1.1% each, with Boeing, GE Aerospace, Eli Lilly, and Merck among the highest-weighted positions. NVIDIA, Apple, and Microsoft each sit at roughly 1% weight — meaningful exposure, but not the 7% or 8% they command in a standard large-cap index fund. The fund has been operating since December 2006 and carries a 0.25% expense ratio with a 1.82% dividend yield.
EQWL is down about 2% year-to-date, the only fund in this group with a negative 2026 return so far. That reflects its heavier concentration in mega-cap names that have pulled back alongside broader tech sentiment. Over ten years, however, EQWL has returned 265%, the strongest long-run figure of the three, reflecting the compounding power of holding quality large-cap businesses at equal weight through full market cycles.
The tradeoff is that EQWL’s narrower 100-stock universe means it is more sensitive to what happens in the mega-cap tier. When those names struggle, there is no mid-cap cushion the way RSP provides.
Choosing the Right Equal-Weight Structure
These three funds answer three different versions of the same question. RSP is the broadest and most liquid choice for investors who want to reduce mega-cap concentration across the entire S&P 500 while picking up a natural tilt toward smaller large-cap and mid-cap names. EQL suits investors who think in terms of sector exposure and want every corner of the economy represented equally, without abandoning the largest companies within each sector. EQWL fits investors who want to stay in mega-cap territory but remove the winner-take-all weighting that makes the standard large-cap index so top-heavy. The starting point is deciding whether you want to diversify across stocks, across sectors, or simply within the largest names — each fund is built for a different answer.