Equal Weighted vs Market Cap Weighted ETFs: What's the Difference?

Equal weighted ETFs exist as an alternative. Instead of giving bigger companies a bigger slice, they give every holding the same slice.

Neither approach is inherently better — they're different tools with different trade-offs. This guide walks through how each one works, where you can find them on the ASX, and how to think about which one (or which mix) suits your portfolio. This is general information only, not personal financial advice — more on that at the end.

What Is a Market Cap Weighted ETF?

Most ETFs and index funds — including nearly every "core" Australian and global shares ETF — use market capitalisation weighting. A company's weight in the index is based on its total market value (share price × number of shares on issue). The bigger the company, the bigger its slice of the fund.

This is how the S&P/ASX 200, the S&P 500, and most other headline indices are built. It's also how the majority of ASX-listed index ETFs work, including:

• Vanguard Australian Shares Index ETF (VAS) — tracks the ASX 300, management fee around 0.07% p.a.

• BetaShares Australia 200 ETF (A200) — tracks the ASX 200, around 0.04% p.a.

• iShares Core S&P/ASX 200 ETF (IOZ) — tracks the ASX 200, around 0.05% p.a.

• SPDR S&P/ASX 200 Fund (STW) — the original ASX 200 ETF, around 0.13% p.a.

Because market cap weighting simply mirrors the index as it stands, it's cheap to run and easy to understand. But it also means the fund's performance is disproportionately driven by whichever handful of companies happen to be the largest at any given time.

What Is an Equal Weighted ETF?

An equal weighted (or "equal weight") ETF gives every holding in the index the same percentage allocation, regardless of the company's size. A $300 billion bank and a $3 billion mid-cap industrial get the same weighting on day one.

Because share prices move at different rates, an equal weighted fund needs to be periodically rebalanced — trimming winners and topping up laggards — to bring every holding back to the same weight. On the ASX, the main examples are:

• VanEck Australian Equal Weight ETF (MVW) — equally weights around 70–100 of the larger, more liquid ASX-listed companies, rebalanced quarterly, total cost ratio around 0.35% p.a.

• BetaShares S&P 500 Equal Weight ETF (QUS) — equally weights all 500 companies in the S&P 500 for ASX investors wanting equal weighted exposure to the US market, management fee around 0.29% p.a.

Notice both cost meaningfully more than their market cap weighted counterparts. That's the price of the extra trading required to keep everything rebalanced.

A Simple Worked Example

Say a fund holds just three companies:

Put $3,000 into a market cap weighted version of this fund and roughly $1,875 lands in Stock A alone. Put the same $3,000 into an equal weighted version and $1,000 goes into each. Same three companies, very different exposure.

Why This Matters Right Now: ASX Concentration Risk

This isn't just a theoretical exercise for Australian investors — it's a live issue. As at March 2026, the top ten companies in the S&P/ASX 200 represented around 49% of the index's total weight, up from roughly 46% just four months earlier. The big four banks alone make up close to a quarter of the index, and Commonwealth Bank (CBA) — whose market capitalisation passed $300 billion in 2025 — represents more than 9% on its own.

For context, the ten largest companies in the S&P 500 make up around 32% of that index. Australia's sharemarket is materially more concentrated than the US, largely because it's dominated by a small number of very large banks and miners.

For everyday investors, this means a "set and forget" ASX 200 ETF is really a bet that a handful of financial and resources giants keep performing well. For SMSF trustees in particular, who often carry large, long-term allocations to Australian shares, this concentration is increasingly part of the diversification conversation with advisers.

Equal Weighted vs Market Cap Weighted: Side-by-Side

Pros and Cons of Market Cap Weighting

Advantages

• Low cost — typically a fraction of a per cent per year

• Low turnover, so fewer taxable events triggered inside the fund

• Simple, transparent, and genuinely reflects "the market" as it exists

Drawbacks

• Concentration risk — a handful of mega-caps can dominate returns (and losses)

• Tends to lean into whatever sector or theme is currently in favour (a "momentum" bias)

• Smaller and mid-sized companies get diluted almost to irrelevance

Pros and Cons of Equal Weighting

Advantages

• Meaningfully lower concentration in the largest few names

• Structural "buy low, sell high" discipline through quarterly rebalancing

• Greater exposure to mid-sized companies that market cap indices underweight

Drawbacks

• Higher management fees than the market cap equivalent

• More frequent rebalancing can create more distributions and capital gains events, with tax consequences worth discussing with a registered tax agent

• No guarantee of outperformance — see below

Which Has Performed Better?

This is where it pays to be honest rather than sell you a story.

Over the ten years to March 2026, Morningstar data shows VanEck's Australian Equal Weight ETF (MVW) returned around 10% per annum, against roughly 10.76% per annum for the S&P/ASX 200 — and with a lower risk-adjusted return (Sharpe ratio) over that period. In other words, over the past decade, simply holding the market cap weighted index would have done slightly better than the equal weighted alternative, largely because Australian banks and miners performed strongly.

That said, equal weighting has had its moments — historically doing relatively better during periods when mega-caps have lagged, or when smaller and mid-sized companies have outperformed. Globally, the picture is similarly mixed: equal weighted US strategies have sometimes beaten the S&P 500 and sometimes lagged it, largely depending on how concentrated the "Magnificent Seven"-style mega-caps have been in any given period.

Past performance is not a reliable indicator of future returns. Neither approach is guaranteed to outperform the other, and both carry the risk of loss. The honest takeaway is that equal weighting changes your risk exposure — it doesn't eliminate risk, and it isn't a shortcut to better returns.

How to Decide What Fits Your Portfolio

There's no universal right answer here — it depends on your own goals, risk tolerance, and how the rest of your portfolio is built. A few general considerations:

• Cost sensitivity. If keeping fees as low as possible matters most to you, market cap weighted ETFs are hard to beat.

• Concentration comfort. If the idea of nearly a quarter of your Australian shares exposure sitting in four banks makes you uneasy, an equal weighted allocation can dilute that.

• Core-satellite approach. Many investors use a market cap weighted ETF as their core Australian or global shares holding, then add a smaller equal weighted "satellite" allocation for diversification. If you're new to building a portfolio this way, our guide on building a share portfolio from scratch walks through the core-satellite concept in more detail.

• Time horizon. Both strategies are generally considered long-term holdings (years, not months), given the extra trading and rebalancing costs involved in switching frequently.

This is general information to help you understand the landscape — it isn't personal advice, and it doesn't take into account your individual circumstances. If you're unsure what's right for you, consider speaking with a licensed financial adviser.

How to Buy These ETFs in Australia

Both market cap weighted and equal weighted ETFs trade on the ASX just like ordinary shares, which means you can buy either — or a mix of both — through an online broker. If you're new to the process, our beginner's guide to buying shares in Australia covers account setup, funding, and placing your first order step by step.

With Selfwealth, you can trade ASX-listed ETFs alongside US and Hong Kong markets from one account, for a flat $9.50 brokerage per trade — no matter the size of the order. See our full pricing and fees for details.

If you'd rather build a position gradually instead of timing a lump sum, Auto-Invest lets you schedule recurring buy orders into either a market cap weighted or equal weighted ETF — weekly, fortnightly, or monthly — so you're dollar-cost averaging into your chosen strategy automatically.

Ready to put this into practice? Sign up to Selfwealth to open a share trading account and start building your portfolio your way.

FAQs

What is the difference between equal weighted and market cap weighted ETFs? 

Market cap weighted ETFs allocate more to larger companies, based on their market value. Equal weighted ETFs give every holding the same allocation, regardless of company size, and rebalance periodically to maintain that balance.

Is equal weight or market cap weight better? 

Neither is definitively better — they carry different risk and return profiles. Market cap weighting has historically kept pace with, or outperformed, equal weighting during periods when large-cap banks and miners do well; equal weighting can perform relatively better when smaller and mid-sized companies lead. Past performance doesn't guarantee future results.

What are examples of equal weighted ETFs on the ASX? 

The VanEck Australian Equal Weight ETF (MVW) covers Australian shares, while the BetaShares S&P 500 Equal Weight ETF (QUS) gives equal weighted exposure to the US market. Both are general examples for context, not recommendations.

Why is the ASX 200 so concentrated in banks? 

Australia's sharemarket has historically been dominated by a small number of very large financial institutions and resources companies. As at March 2026, the big four banks made up close to a quarter of the S&P/ASX 200's total weight.

Do equal weighted ETFs cost more? 

Generally, yes. The quarterly rebalancing required to maintain equal weights involves more trading than a market cap weighted fund, which typically translates into a higher management fee.

Can I combine both strategies in one portfolio? 

Yes — many investors use a market cap weighted ETF as a low-cost core holding and add a smaller equal weighted allocation alongside it for extra diversification. This is a general portfolio construction approach, not personal advice.