# How Do You Compare Two ETFs Side by Side? Source: https://www.vistashares.com/how-to-compare-two-etfs/ Published: 2026-11-13 | Updated: 2026-11-13 By Adam Patti, Chief Executive Officer, VistaShares | November 2026 Comparing two ETFs means looking past their names and recent returns to how each fund is built. A useful side-by-side review covers six areas: the objective and strategy, the holdings, the total cost, liquidity and trading, the legal and tax structure, and the risks. Funds that appear similar on the surface often differ meaningfully in one or more of these areas, and those differences shape how each fund behaves. ## 1. Objective and strategy Start with what each fund is designed to do. The prospectus states the investment objective and principal strategies. **What is the goal?** Tracking an index, generating income, reducing volatility, pursuing growth or targeting a theme. **Index or active?** An index fund follows published rules; an active fund depends on a manager's process. Our article on [active versus passive ETFs](https://www.vistashares.com/active-vs-passive-etfs/) explains the difference. **Methodology or process.** For index funds, review how the index selects and weights holdings and how often it rebalances. For active funds, review how the manager makes decisions. **Special features.** Options strategies, leverage, outcome periods or currency hedging change how a fund behaves. Our articles on [covered call ETFs](https://www.vistashares.com/what-is-a-covered-call-etf/), [buffer ETFs](https://www.vistashares.com/how-do-buffer-etfs-work/) and [single-stock ETFs](https://www.vistashares.com/single-stock-etfs/) describe common examples. ## 2. Holdings Two funds with similar objectives can hold very different portfolios. **Number of holdings and top 10 weight.** These show how concentrated each fund is. Our article on [concentration risk in ETFs](https://www.vistashares.com/etf-concentration-risk/) explains these measures. **Sector, country and size exposure.** These reveal tilts that names may not suggest. **Weighting method.** Market-cap, equal, fundamental or other weighting changes the portfolio substantially. Our article on [equal-weight versus market-cap-weight ETFs](https://www.vistashares.com/equal-weight-vs-market-cap-weight-etfs/) explains why. **Overlap.** How much the two funds share, and how much each overlaps with the rest of the portfolio. Our article on [ETF portfolio overlap](https://www.vistashares.com/etf-portfolio-overlap/) explains how to measure it. **For bond funds,** compare duration, credit quality and sector mix. Our article on [bond ETFs](https://www.vistashares.com/bond-etfs-explained/) covers these. ## 3. Total cost **Expense ratio.** The annual fee, disclosed in the prospectus fee table. Note any fee waivers and when they expire. **Trading costs.** The median bid-ask spread, published on most ETF websites, shows the typical cost of buying and selling. Our article on [ETF bid-ask spreads](https://www.vistashares.com/etf-bid-ask-spreads-premiums-discounts/) explains how to read it. **Premium or discount history.** Also published on most ETF websites, this shows how closely the market price has tracked net asset value.[1] **Tracking difference.** For index funds, the gap between the fund's return and its index's return over time, which reflects all costs. For long-term holders, the expense ratio usually matters most; for frequent traders, spreads become more important. ## 4. Liquidity and trading **Underlying liquidity.** An ETF's tradability depends largely on the liquidity of its holdings, not only its own trading volume. **Fund size and volume.** Larger funds with more trading activity often have tighter spreads and are less likely to close. Our article on [what happens when an ETF closes](https://www.vistashares.com/what-happens-when-an-etf-closes/) explains closure risk. **Trading hours of the holdings.** International funds may trade with wider spreads when their underlying markets are closed. Our article on [international and emerging-market ETFs](https://www.vistashares.com/international-and-emerging-market-etfs/) explains why. ## 5. Structure and taxes **Legal structure.** Most ETFs are registered investment companies, but some are grantor trusts, commodity pools or exchange-traded notes, each with different risks and tax reporting. Our article on [commodity ETFs](https://www.vistashares.com/commodity-etfs-explained/) describes several structures. **Tax reporting.** Most funds issue Form 1099; partnerships issue Schedule K-1. **Distribution history and character.** How often the fund distributes and whether distributions consist of qualified dividends, ordinary income, capital gains or return of capital. Our article on [distributions versus dividends](https://www.vistashares.com/monthly-dividend-etf-distributions-vs-dividends/) explains each category. **Capital gain distribution history.** Whether the fund has distributed capital gains in past years. Investors should consult a tax advisor about how each fund's structure affects them. ## 6. Risks Read the principal risks section of each prospectus. Common items include market, sector and concentration risk; interest rate and credit risk for bond funds; currency and country risk for international funds; derivatives, leverage and counterparty risk for options-based and leveraged funds; and liquidity risk for funds holding less liquid assets. Comparing the risk sections side by side often clarifies differences that fact sheets do not. ## What are common mistakes when comparing ETFs? **Choosing on name alone.** Fund names can be broad or marketing-oriented and may not describe holdings precisely. **Focusing only on recent returns.** Short-term results often reflect market conditions that may not persist, rather than the quality of a fund's design. **Comparing yields without context.** Distribution rates and SEC yields measure different things, as our article on [distribution rate versus 30-day SEC yield](https://www.vistashares.com/distribution-rate-vs-sec-yield/) explains. **Ignoring structure.** Two funds with similar exposure can differ in tax reporting, counterparty risk or liquidity because of how they are built. **Overlooking the rest of the portfolio.** A fund that looks attractive alone may add overlap or concentration to existing holdings. ## What about performance? Past performance can show how a fund behaved in different market conditions, but it does not guarantee future results. When comparing performance, use total return, which includes distributions; compare the same periods; consider whether funds with short histories have been through different market environments; and keep in mind that differences in performance usually trace back to differences in strategy, holdings and cost. ## How do you put it together? A simple table with a column for each fund and rows for objective, strategy, holdings, concentration, expense ratio, spread, size, structure, tax reporting and key risks often makes the differences clear. The right choice depends on which fund's design fits the investor's goals more closely and the role the fund plays in the portfolio. Our article on [core and satellite investing](https://www.vistashares.com/core-and-satellite-investing-with-etfs/) discusses portfolio roles, and more introductory topics are covered in our [ETF basics guide](https://www.vistashares.com/etf-basics-guide/). Investments involve risk, including possible loss of principal. ## Frequently asked questions ### What is the most important factor when comparing two ETFs? It depends on the purpose. For broad index funds tracking the same market, costs and tracking difference often matter most. For specialized or active funds, strategy and holdings usually matter more. Comparing all six areas avoids overlooking a key difference. ### Where can I find the information to compare ETFs? The prospectus covers objective, strategy, fees and risks. The fund's website typically provides daily holdings, fact sheets, median bid-ask spreads and premium or discount history. Brokerage and research platforms also offer side-by-side comparison tools. Annual and semiannual reports add detail on holdings and expenses. ### Why do two ETFs tracking the same index perform differently? Differences in expense ratios, sampling methods, securities lending, trading costs and the timing of index changes can cause small gaps. Funds tracking different versions of an index, such as different weighting or share classes, can show larger differences. Tracking difference over several periods captures these effects. ### Should I choose the ETF with the lowest expense ratio? Cost matters, especially for long-term holders, but it is one factor among several. Two funds with similar costs can differ in holdings, structure and risk. When funds provide essentially identical exposure, the lower-cost fund often makes sense; when they differ, the strategy may matter more. ### How much does fund size matter? Fund size can affect trading costs and the likelihood of closure. Very small funds may close if they fail to attract assets, which can create an unplanned sale. Size is not a measure of quality, but it is worth considering alongside other factors. ## NOTES - U.S. Securities and Exchange Commission, Rule 6c-11 under the Investment Company Act of 1940, website disclosure requirements. ## IMPORTANT INFORMATION This material is provided for educational purposes only. It is not investment, legal or tax advice, and it is not a recommendation or an offer to buy or sell any security. Information is drawn from sources believed to be reliable as of the date of publication, is not guaranteed as to accuracy or completeness, and may change without notice. Figures attributed to third parties are their estimates. Projections and forecasts are not guarantees of future results. Investors should consult their own financial, legal and tax professionals before making investment decisions. Investments involve risk, including possible loss of principal. ETF shares are bought and sold at market price, which may differ from net asset value, and brokerage commissions and other trading costs may apply.