How XEQT Uses Market-Cap Weighting: What It Means for Your Portfolio

Last summer I was sitting on a patio in Montreal with my friend Sarah, who had just opened her first TFSA and bought $5,000 worth of XEQT on Wealthsimple. She was feeling good about it – she had done her research, she knew XEQT was a globally diversified all-in-one ETF, and she liked the idea of owning “the whole world” in a single ticker. But then she pulled up her holdings breakdown and frowned.

“Why is Apple my biggest holding?” she asked. “I thought this was supposed to be diversified. And why do I own more Microsoft than the entire country of Brazil?”

It was an excellent question – one I had asked myself two years earlier, sitting at my kitchen table at midnight, scrolling through XEQT’s fund page on the iShares website. If XEQT holds over 9,000 stocks across 40+ countries, why does it feel like a handful of American mega-corporations are running the show?

The answer comes down to two words: market-cap weighting. It is the single most important concept to understand about how XEQT works, and once you grasp it, everything about the fund’s structure clicks into place.

Let me walk you through the same explanation I gave Sarah.

Disclosure: I may receive a referral bonus if you sign up through links on this page.

1. What Market-Cap Weighting Actually Means (Plain English, No Jargon)

Market-cap weighting is simply this: the bigger the company, the bigger its slice of the fund.

A company’s market capitalization – its “market cap” – is calculated by multiplying its share price by the total number of shares outstanding. If Apple has 15 billion shares outstanding and each share trades at $230, Apple’s market cap is roughly $3.45 trillion. That makes it one of the largest companies on the planet, and in a market-cap-weighted fund, it gets one of the largest allocations.

Here is an absurdly simplified example. Imagine a stock market with only three companies:

If you bought a market-cap-weighted index fund tracking this tiny market, 50 cents of every dollar you invest would go to MapleTech, 30 cents to TimbitsGlobal, and 20 cents to PoutineCo. Not because anyone decided MapleTech was the “best” company – but because the market collectively values it the most.

This is exactly what happens inside XEQT, just at a massive scale. Apple, Microsoft, and NVIDIA are at the top not because a portfolio manager picked them – but because the market has assigned them the largest valuations on earth.

The key insight: A market-cap-weighted fund is not making a bet. It is simply reflecting the market’s collective opinion about what every company is worth, right now, at this moment. You are not overweighting Apple. You are owning Apple in proportion to how the entire investing world values it.

2. How Market-Cap Weighting Works Inside XEQT’s Four Underlying ETFs

XEQT does not directly hold 9,000+ stocks. It holds four underlying iShares ETFs, and each of those ETFs uses market-cap weighting internally:

Here is what is happening at each level:

Level 1 – Within each ETF: Every underlying fund is market-cap weighted. Inside ITOT, Apple gets a bigger slice than a small-cap retailer in Ohio. Inside XIC, Royal Bank gets a bigger slice than a junior mining company in Vancouver. Inside XEF, Nestle and ASML are weighted more heavily than a small industrial firm in Finland.

Level 2 – Between the four ETFs: The allocation between the four underlying funds (45/25/25/5) is set by BlackRock’s asset allocation committee and reflects a blend of global market cap weights with a deliberate home country bias toward Canada. This geographic split is reviewed periodically but does not change with daily market movements the way individual stock weights do.

When you buy one share of XEQT, your money flows into the four underlying ETFs according to BlackRock’s target allocation, and within each ETF, it flows to individual stocks according to their market cap. That is why Apple – sitting inside ITOT which gets ~45% of XEQT – ends up as your single largest holding, while a small-cap Brazilian company inside IEMG (which gets only ~5% of XEQT) might represent 0.0001% of your portfolio.

3. Why Apple, Microsoft, and NVIDIA Are Your Biggest Holdings

Let me put concrete numbers on this so it really sinks in. Here are the approximate top 10 holdings in XEQT, which are essentially the top holdings of ITOT (the US portion) scaled by XEQT’s ~45% US allocation:

A few things jump out:

• Your top 10 holdings add up to roughly 18-19% of the fund. That means over 80% of your money is spread across 9,000+ other companies.
• 8 of the top 10 are American. This isn’t a bias in XEQT’s design – it reflects the fact that the largest companies on earth happen to be American right now. Thirty years ago, Japanese companies dominated the top 10. Things change.
• Royal Bank of Canada cracks the top 10 because it is the largest company in the Canadian portion (XIC), and Canada gets a ~25% allocation. RBC’s global market cap would not put it in the top 10 of a purely global index, but XEQT’s home country tilt gives it a boost.

This is market-cap weighting doing exactly what it is supposed to do. The companies the market values the most get the most weight. No human is sitting in a room deciding that Apple “deserves” 3.5%. The market decided that. XEQT just reflects it.

4. The Magnificent Seven Concentration Debate

You have probably heard the term “Magnificent Seven” – Apple, Microsoft, NVIDIA, Alphabet, Amazon, Meta, and Tesla. These seven companies have collectively driven an enormous share of US stock market returns in recent years, and because XEQT is roughly 45% US stocks, they are a significant presence in the fund.

Combined, the Magnificent Seven make up roughly 15-16% of XEQT’s total portfolio. That is a big number for just seven companies out of 9,000+. Critics argue this is dangerous concentration – that XEQT is “secretly” a bet on big US tech.

Let me address this head-on, because I think the criticism is both understandable and mostly overblown.

Why the concern makes sense: If those seven companies had a terrible year – maybe an AI bubble pops, or antitrust regulation hits, or a recession crushes ad spending – you would feel it. A 30% decline across the Mag Seven would drag XEQT down by roughly 4-5%, even if every other stock in the world stayed flat.

Why the concern is overblown:

• 15-16% is not 50%. The other 84-85% is spread across thousands of companies in dozens of countries. This is not Nortel-in-2000 concentration, where a single company was 33% of the Canadian index.
• They earned their weight. These companies generate enormous revenues, profits, and cash flows. Apple pulls in over $380 billion in annual revenue. These weights reflect real economic scale, not hype.
• The weight is self-correcting. If Apple drops 40%, its weight in XEQT automatically shrinks. The index rebalances itself by definition. More on this in Section 6.
• Historical precedent is reassuring. In the early 1980s, IBM, Exxon, and AT&T dominated. In the late 1990s, it was GE and Cisco. The top names always rotate, the index adapts, and long-term returns keep compounding.

XEQT’s geographic diversification also provides a natural buffer – 55% of your portfolio has nothing to do with the Magnificent Seven. For a deeper look, check out my post on how XEQT protects you from the next Nortel.

5. Market-Cap Weighting vs. Equal Weighting vs. Fundamental Weighting

Market-cap weighting is the most popular approach to building an index, but it is not the only one. Two common alternatives are equal weighting and fundamental weighting. Understanding the differences helps you appreciate why cap-weighting dominates – and why XEQT uses it.

Market-cap weighting gives each stock a weight proportional to its total market value. Equal weighting gives every stock the same weight regardless of size. Fundamental weighting uses metrics like revenue, earnings, or book value instead of market price.

Why market-cap weighting wins for most investors

1. Lowest cost. Stock weights change naturally as prices move, so a cap-weighted index rarely needs to trade. An equal-weight fund has to constantly rebalance, racking up trading costs and taxable events.

2. Unlimited capacity. A cap-weighted index buys stocks in proportion to their existing liquidity, so it can absorb trillions without moving the market. Equal-weight funds struggle at scale.

3. It is the “default” state of the market. If every investor on earth held a cap-weighted index, supply and demand would be in perfect balance. Every other weighting scheme is, by definition, a bet that the market is mispricing something.

4. Long-term performance has been excellent. The SPIVA data consistently shows that over 90% of active managers underperform their cap-weighted benchmark over 15 years. Equal-weight and fundamental-weight strategies have periods of outperformance, but higher fees eat into any edge.

For most Canadian investors – especially those who value simplicity, low cost, and tax efficiency – market-cap weighting is the right default.

6. The Self-Cleansing Nature of Cap-Weighted Indexes

This is my favourite part of market-cap weighting, and the one I think most people overlook. A cap-weighted index is self-cleansing. It automatically reduces your exposure to companies that are declining and increases your exposure to companies that are rising – without you lifting a finger.

Here is how it works in practice.

Imagine you own XEQT today, and Apple is your largest holding at roughly 3.5%. Now suppose, over the next two years, Apple runs into serious trouble – maybe iPhone sales collapse, maybe they face massive antitrust breakup, whatever the scenario. Apple’s stock drops 70%.

What happens to your XEQT portfolio? Apple’s weight automatically shrinks. If it was 3.5% and the stock falls 70% while the rest of the market holds steady, Apple’s weight drops to roughly 1.1%. You did not sell. You did not rebalance. You did not call your broker. The index simply reflects the new reality.

Meanwhile, suppose a company you have never heard of – let’s call it NovaAI – has been growing explosively. Its stock triples over two years, and its market cap grows from $50 billion to $150 billion. In a cap-weighted index, NovaAI’s weight automatically increases. You now own more of the winner and less of the loser.

Compare this to an equal-weight index, where you would actually be buying more of the declining Apple (to maintain equal weights) and selling the surging NovaAI. The equal-weight approach forces you to fight the market’s momentum rather than ride it.

This self-cleansing mechanism is why cap-weighted indexes have survived every bubble, sector rotation, and corporate collapse since they were invented. In the 1980s, oil companies dominated. In the late 1990s, dot-com companies ballooned to huge weights – then their weights collapsed automatically when the bubble burst. In the 2010s, FAANG stocks rose to prominence. In every era, the index adapted without anyone lifting a finger.

You do not need to predict which companies will lead the next decade. A cap-weighted index will figure it out for you, in real time, at zero cost.

7. Why Cap-Weighting Has Outperformed Historically

The track record of cap-weighted indexing is remarkably strong. Three factors work together.

The cost advantage compounds relentlessly. XEQT charges a management expense ratio of just 0.20% per year. A typical actively managed Canadian mutual fund charges 1.5% to 2.5%. Over 30 years, that 1.5% annual fee difference turns a $100,000 investment into roughly $977,000 (at 0.20% MER) versus $621,000 (at 1.70% MER). That is $356,000 lost to fees alone – assuming identical gross returns. And as the SPIVA data shows, active managers typically underperform even before fees.

The market is hard to beat. This ties directly into the efficient market hypothesis. Thousands of professional analysts, hedge funds, and algorithmic systems are competing to find mispriced stocks. By the time information reaches a retail investor, it is already baked into the price. Cap-weighted indexing sidesteps this game entirely. You are just owning the market in proportion to how millions of investors collectively value each company.

Low turnover means higher after-tax returns. Because cap-weighted indexes rarely need to trade, they generate fewer capital gains distributions. In a non-registered account, this means less tax drag. Over decades, this tax efficiency compounds alongside the fee advantage.

8. The “Top-Heavy” Criticism – And Why It Is Usually Overblown

The most common criticism of market-cap weighting goes like this: “The index is too concentrated in a few giant companies. If they stumble, the whole index tanks.”

I take this seriously. But I think it misses the bigger picture.

Historical concentration is not unusual. The US stock market has always had dominant companies. In the early 1980s, IBM, AT&T, Exxon, and GE made up roughly 25% of the S&P 500. In the late 1990s, it was GE, Microsoft, Cisco, and Intel at 25-27%. Today’s top 10 are at roughly 30-33% – higher than average, but not a completely different regime. The S&P 500 has delivered excellent long-term returns through every era of concentration.

XEQT is far less concentrated than the S&P 500. Because it spreads your money across four geographic regions, the Magnificent Seven’s effective weight in XEQT (~15-16%) is about half their weight in a pure US fund (~30%). If the Mag Seven fell 50%, a pure S&P 500 fund would drop roughly 15% while XEQT would drop roughly 7-8%. That geographic diversification is doing real work.

Concentration risk cuts both ways. If the biggest companies continue growing faster than the rest, concentration is a feature. During 2010-2024, mega-cap tech drove a disproportionate share of global returns, and cap-weighted investors captured every bit of it. An equal-weight investor would have been systematically selling the winners.

Beyond the mega-cap question, XEQT provides layered diversification that goes far deeper than any single weighting methodology:

• Geographic: 55% of your money is outside the United States. If the US has a lost decade – as it did from 2000-2010 – you have significant exposure to other economies.
• Sector: Different countries have different strengths. Geographic diversification automatically gives you sector diversification. Canada is heavy in financials and energy. The US leads in tech. Europe has strength in industrials and healthcare.
• Currency: You have exposure to the USD, EUR, GBP, JPY, and dozens of other currencies. When the Canadian dollar weakens, your foreign holdings are worth more in CAD terms – a natural hedge. (More on my XEQT currency exposure page.)

The bottom line: even Apple at 3.5% of XEQT could not come close to ruining your portfolio. Compare that to Nortel at 33% of the TSX in 2000 – that kind of concentration destroyed retirements. XEQT’s layered diversification means no single company, sector, or country can blow up your financial future.

9. Common Questions About XEQT’s Market-Cap Weighting

“Doesn’t market-cap weighting mean you buy more of overvalued stocks?”

This assumes you can identify overvaluation in real time. If you could, you would be richer than Warren Buffett. The efficient market hypothesis suggests that current prices are the best available estimate of true value – which means cap-weighting is actually the most rational allocation. Were the Magnificent Seven overvalued in 2023? Many said yes. Then they went up another 30-40% in 2024.

“Should I combine XEQT with an equal-weight ETF for balance?”

You could, but I do not think it is necessary for most investors. Adding an equal-weight ETF increases your small-cap exposure and reduces mega-cap concentration, but it also increases complexity, fees, and rebalancing work. XEQT is designed to be a complete portfolio in one fund. If you want a tilt toward small caps or value stocks, you might explore factor ETFs, but for most people, XEQT alone is more than sufficient.

“What about capping individual stock weights?”

Some indexes cap any single stock at a maximum weight (for example, the S&P/TSX Capped Composite that XIC tracks limits any single company to 10%). This prevents extreme concentration while still using market-cap weighting as the base methodology. XEQT benefits from this through its XIC holding, and the geographic diversification provides additional capping at the total-portfolio level.

“Does market-cap weighting work in all markets?”

It works best in large, liquid, well-regulated markets – which is exactly what XEQT’s four underlying indexes cover. XEQT does not invest in frontier markets where prices may not reflect fundamentals accurately.

10. What This All Means for Your XEQT Investment

Let me tie everything together with the practical takeaways.

Market-cap weighting is the engine that makes XEQT work. It determines which stocks get the biggest allocation, it keeps costs rock-bottom by minimizing trading, it self-corrects when companies rise or fall, and it has delivered returns that beat the vast majority of active managers over every long-term period ever measured.

The concentration in mega-cap tech is real but manageable. Yes, the Magnificent Seven are roughly 15-16% of your portfolio. But XEQT’s four-region geographic split dilutes that concentration significantly compared to a US-only fund. You have 9,000+ other stocks providing ballast. And if those mega-caps decline, their weights shrink automatically.

You do not need to do anything about it. The beauty of cap-weighted indexing is that it requires zero intervention. You do not need to rebalance, pick winners, or worry about whether tech is overvalued. The index adapts in real time, every trading day, at zero cost to you.

That is what I told Sarah on that Montreal patio. Set up automatic contributions, stop checking the app every day, and let the elegant machinery of market-cap weighting do its job for the next 20 or 30 years. Your future self will thank you.

Related Reading

• What Is XEQT? – The fundamentals of Canada’s most popular all-in-one equity ETF.
• XEQT Sector Breakdown – See exactly which industries your money is invested in.
• XEQT Home Country Bias Explained – Why 25% in Canada is a feature, not a bug.
• How XEQT Protects You from Single-Stock Risk – The case for broad diversification.
• The Efficient Market Hypothesis and XEQT – Why passive investing wins.
• XEQT vs Factor ETFs – Should you tilt toward value, momentum, or quality?
• XEQT Returns by Year – The complete performance history since inception.
• How to Automate Your XEQT Purchases on Wealthsimple – Set it and forget it.