QCOM

Exchange traded funds (ETFs) have become widely used tools for building diversified portfolios in Canada. With thousands of ETFs listed across North American exchanges, a common question among investors is: how many ETFs do investors typically own?

The answer often depends on how diversification, overlap, simplicity, and costs interact within a portfolio. While some investors hold one fund, others hold multiple ETFs spanning asset classes, sectors, and regions. Historical research on diversification, asset allocation, and portfolio construction offers context for understanding how ETF count may influence risk and return characteristics over time.

This article examines how many ETFs may contribute to broad exposure, when multiple ETFs may overlap, and how costs and complexity can scale as holdings increase.

Understanding What An Exchange Traded Fund Represents

ETFs are pooled investment funds that trade on stock exchanges. Most ETFs track an index fund benchmark, such as the S&P 500, global equity indices, or fixed income markets. Because ETFs hold baskets of securities, a single fund can provide exposure to hundreds or even thousands of publicly traded companies.

For example:

• A broad U.S. equity ETF tracking the S&P 500 may hold exposure to 500 large-cap companies.
• A global equity ETF may include international stocks across developed and emerging markets.
• A fixed income ETF may hold bonds issued by governments and corporations.

In this context, one ETF can already represent substantial diversification across assets and sectors.

One Fund Vs Multiple ETFs

Some investors hold one fund that includes global equities and bonds. Asset allocation ETFs, offered by various fund providers, bundle multiple asset classes into a single structure.

A single ETF may offer:

• Broad exposure to domestic and international stocks
• Fixed income exposure
• Automatic rebalancing
• Low cost management

Alternatively, multiple ETFs may allow:

• Separate allocation to equities and bonds
• Distinct exposure to emerging markets
• Sector ETFs targeting specific industries
• Small cap ETF exposure for additional diversification

Both approaches can provide diversified portfolios. The difference may lie in flexibility, customization, and administrative simplicity rather than in ETF count alone.

What “How Many ETFs” Is Really Asking

The question of how many ETFs a portfolio should hold often reflects broader concerns about diversification, cost control, and simplicity. Rather than focusing strictly on fund count, the discussion may center on measurable criteria such as exposure coverage, overlap, and administrative complexity. Historical research on portfolio construction suggests that asset allocation and diversification across markets have influenced outcomes more than the number of individual holdings.

ETF Count Vs Exposure Coverage

ETF count and exposure coverage are not the same concept. A portfolio holding one or two broad ETFs may already provide exposure to thousands of securities across asset classes, sectors, and regions. For example, a global equity ETF may include domestic stocks, international stocks, and emerging markets within a single structure. Adding more ETFs does not necessarily increase diversification if the new funds hold similar companies or assets.

A Practical Definition Of “Too Many”

“Too many ETFs” may be defined using objective indicators, such as:

• High overlap in underlying holdings
• Unclear role or purpose for each ETF
• Duplicate fees for similar exposure
• Operational complexity and monitoring burden

These criteria may help frame the discussion in measurable terms rather than fixed numbers.

Overlap: A Hidden Factor

Overlap occurs when multiple ETFs hold the same securities. For example:

• An S&P 500 ETF holds large-cap U.S. companies.
• A dividend equity ETF may also hold many of those same companies.
• A sector ETF may overweight companies already included in broad market ETFs.

This means that adding many ETFs does not automatically create a more diversified portfolio. Instead, concentration risk may persist if the highest weighting remains in a small number of companies.

Analyzing underlying holdings can reveal whether additional ETFs truly expand exposure or simply duplicate existing positions.

Broad ETFs Vs Sector ETFs

Broad market ETFs track large segments of the stock market and may provide exposure to hundreds or thousands of companies across different sectors.

Sector ETFs, by contrast, focus on specific industries such as:

• Consumer staples
• Consumer discretionary
• Financials
• Energy
• Technology

Sector ETFs may increase exposure to specific industries but may also introduce higher volatility. Historical data shows that sector performance can vary widely depending on economic cycles, interest rates, and global market conditions.

As a result, adding sector ETFs increases portfolio concentration in specific industries rather than broad diversification.

International ETFs And Global Exposure

Many Canadian investors use international ETFs to gain exposure to the global economy beyond domestic markets.

International ETFs may include:

• U.S. equities
• Developed international stocks
• Emerging markets
• Global fixed income

A portfolio with only Canadian equities may face concentration in financials and energy sectors. Adding international ETFs may broaden exposure across different sectors and regions.

How Many ETFs And Cost Considerations

Expense ratio plays a role in long-term outcomes. While most ETFs are known for low expenses compared to mutual funds, holding multiple ETFs may increase aggregate costs if funds carry higher expense ratios.

For example:

• A single low cost broad ETF may have an expense ratio of 0.20%.
• Combining several specialized ETFs with expense ratios between 0.30% and 0.60% may increase overall portfolio costs.

Over long periods, research from Vanguard indicates that lower costs have historically been associated with higher net returns, all else equal. Cost differences may appear modest annually but can compound over time.

Complexity And Rebalancing

Holding many ETFs may require periodic rebalancing to maintain target allocations across asset classes.

Rebalancing may involve:

• Monitoring weightings
• Buying and selling ETFs
• Tracking cash distributions
• Adjusting for market movement

A portfolio consisting of one fund may simplify these administrative tasks. A portfolio containing multiple ETFs may allow more granular adjustments but could require more oversight.

Administrative simplicity can be an important consideration, particularly for long term investors managing portfolios independently.

The Role Of Risk Tolerance And Time Horizon

Risk tolerance and time horizon often influence how asset classes are combined within a portfolio. The number of ETFs held may reflect how exposure is structured across:

• Equities
• Bonds
• Real estate investment trusts
• International markets

For example:

• A portfolio with high equity exposure may include several equity ETFs.
• A more balanced allocation may combine equity and fixed income ETFs.

Historically, equities have exhibited higher volatility than bonds, while bonds have provided lower long-term returns but reduced variability. The number of ETFs may matter less than how risk is distributed across assets.

Practical Examples Of ETF Counts

While there is no universal number, common portfolio structures observed in Canadian markets include:

• One fund: A single asset allocation ETF providing global equity and bond exposure.
• Two to three ETFs: Separate equity and fixed income funds.
• Three to five ETFs: Canadian equity, U.S. equity, international equity, bonds, and possibly emerging markets.
• More than five ETFs: Additional sector ETFs, dividend ETFs, or specialized exposures.

As ETF count increases, potential benefits may relate to customization, while trade-offs may involve cost, overlap, and complexity.

What Matters More Than ETF Count

Historical research suggests that portfolio outcomes have been influenced primarily by:

• Asset allocation across stocks and bonds
• Exposure to global markets
• Costs
• Rebalancing discipline

The number of ETFs may influence implementation but may not be the primary driver of long-term results.

Common Mistakes and Misunderstandings

Several misunderstandings commonly affect ETF count decisions:

• Believing more ETFs always equals more diversification. Holding multiple ETFs does not necessarily increase portfolio diversification if underlying holdings overlap or track similar indices, as historical analysis of asset allocation suggests.
• Confusing number of tickers with number of exposures. A single ETF may hold hundreds or thousands of securities across asset classes and regions, so counting ETFs alone may not reflect the true breadth of exposure in a portfolio.
• Adding overlapping ETFs without a defined role. Multiple ETFs with similar holdings can duplicate exposure to certain stocks or sectors, which may concentrate risk instead of spreading it.
• Ignoring concentration that comes from stacking similar themes. Sector or dividend-focused ETFs may increase weighting in certain industries, potentially amplifying exposure to a few companies despite appearing diversified.
• Underestimating the time cost of monitoring many ETFs. Managing numerous ETFs can require frequent rebalancing, tracking distributions, and reviewing holdings, which may increase administrative complexity.
• Treating “simplicity” as under-diversification without checking exposure breadth. Portfolios with only a few ETFs can still offer wide exposure across asset classes and regions; assuming simplicity equates to limited diversification may be misleading.
• Overlooking expense duplication across multiple ETFs. Holding several funds with overlapping securities may result in paying multiple expense ratios for similar exposures, which can affect net returns over time.
• Expecting each ETF to fulfill a unique role automatically. Without evaluating each ETF’s underlying holdings, investors may assume differentiation that may not exist in practice, reducing clarity in portfolio composition.

Conclusion: Balancing ETF Count and Portfolio Exposure

The question of how many ETFs to hold often reflects considerations of diversification, overlap, cost, and simplicity. Historical data shows that a single broad ETF may already provide exposure to hundreds of securities across multiple sectors and regions. Adding multiple ETFs can allow more targeted allocations to sectors, dividend equity ETFs, or international markets, but may introduce overlap, additional fees, and administrative complexity. Rather than focusing solely on the number of ETFs, measurable criteria such as exposure breadth, redundancy, and operational monitoring may provide a clearer understanding of portfolio structure. Overlap between ETFs can reduce incremental diversification, while aggregate expense ratios may rise with multiple funds. Ultimately, ETF count may serve as one indicator among several when evaluating portfolio composition, but underlying holdings, asset class distribution, and cost considerations often play a more significant role in shaping a diversified portfolio.