Evaluate a quantum computing ETF by checking what its mandate counts as “quantum,” what it actually owns, how those holdings are selected and weighted, and what the fund costs to own and trade. The name alone does not establish that a portfolio is made up mainly of pure-play quantum companies. The SEC filings for QTUM and CQTM illustrate two different approaches, but the figures below are dated fund disclosures—not a complete, synchronized comparison of every available fund or a recommendation to buy either one.
What does a quantum computing ETF actually hold?
Start with the fund’s prospectus, not its marketing label. Look for the investment objective, the index methodology or active-selection rules, and the definition of a company that qualifies as quantum-related. A thematic fund may include businesses involved in machine learning, semiconductors, software, or security solutions as well as companies focused more directly on quantum computing.
For example, QTUM seeks to track the BlueStar Quantum Computing and Machine Learning Index before fees and expenses. Its April 30, 2026 summary prospectus describes screening for companies that derive at least 50% of annual revenue or operating activity from quantum-computing or machine-learning-related products or activities, alongside investibility screens. The filing describes a modified equal-weighted portfolio. That definition expressly combines quantum computing with machine learning; it does not mean every holding is a pure-play quantum company. Read QTUM’s SEC summary prospectus.
Then inspect the latest holdings and sector allocations published by the issuer. Identify which holdings have direct quantum-computing activity and which are broader technology or enabling businesses. Check the date of the holdings file: portfolios change, and a prospectus description is not a current holdings list. Defiance says QTUM holdings and sector allocations are subject to change; its fund page is available at Defiance ETFs’ QTUM page.
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How much quantum exposure does the fund really have?
There is no single standard definition of “quantum exposure” in these filings. Compare the fund’s eligibility rules with the actual businesses represented in its portfolio. A policy threshold or screening criterion describes how a fund may invest; it is not necessarily a statement of the percentage of assets currently invested in companies whose primary business is quantum computing.
QTUM’s prospectus describes an index screen that includes machine-learning-related activity as well as quantum-computing activity. By contrast, CQTM’s April 30, 2026 summary prospectus says that, under ordinary market conditions, the actively managed fund invests at least 80% of net assets in a portfolio of companies materially involved in the development, manufacturing, and commercialization of quantum computing and quantum-enabled technologies, along with security solutions designed to protect against future quantum capabilities. That 80% is a stated investment-policy threshold, not a reported realized holding percentage. Read CQTM’s SEC summary prospectus.
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How are the funds managed and holdings chosen?
| Fund | Management approach | What the cited filing says |
|---|---|---|
| QTUM | Passive; seeks to track an index | Seeks to track the BlueStar Quantum Computing and Machine Learning Index before fees and expenses. The prospectus describes a modified equal-weighted portfolio and screening criteria for quantum-computing and machine-learning-related companies. |
| CQTM | Active | The April 30, 2026 summary prospectus states an 80% investment policy under ordinary market conditions for specified quantum-related companies and security solutions. |
With an index fund, examine the index’s inclusion rules, weighting method, and rebalancing provisions in the relevant fund documents. With an actively managed fund, examine the manager’s stated investment policy and how it defines eligible companies. Neither approach guarantees that the portfolio will have more direct exposure, better performance, or lower risk; the practical question is whether the rules produce the exposure you intend.
What costs should you compare?
Compare the expense ratio, turnover, and costs of trading rather than relying on a single fee figure. QTUM’s April 30, 2026 SEC summary prospectus reports annual operating expenses of 0.40% and portfolio turnover of 42% for the fiscal year ended December 31, 2025. These are dated QTUM disclosures, not a current fee comparison across all quantum-themed funds. The prospectus notes that transaction costs associated with turnover and brokerage commissions are not included in the annual operating expenses figure. QTUM’s SEC summary prospectus.
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When you compare funds, verify each current prospectus and record the reporting period next to every figure. Turnover can add transaction costs within the portfolio, while brokerage commissions, if applicable, and the bid-ask spread affect the investor’s cost of buying or selling shares. A quoted expense ratio does not capture all of these costs.
Are the ETF shares liquid and trading near net asset value?
Before placing an order, check current assets, trading volume, the bid-ask spread, and the fund’s premium or discount to net asset value (NAV). These are time-sensitive market measures, not permanent product characteristics. A narrow spread can reduce the cost of an ordinary trade, while a wider spread can make entry or exit more expensive. In stressed markets, liquidity can deteriorate and ETF shares may trade above or below NAV.
QTUM’s prospectus discusses liquidity risk and the possibility that shares trade at a premium or discount to NAV; it also notes that spreads and brokerage costs can weigh on results. CQTM’s summary prospectus identifies liquidity and valuation risk. The filings do not establish a synchronized current comparison of assets, spreads, or trading volumes, so check issuer or exchange data close to the time you invest. Cboe lists CQTM at its CQTM listing page.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What risks should you assess beyond the technology story?
Quantum computing is an emerging technology area, and a thematic ETF combines that business risk with the risks of its particular portfolio and ETF structure. Review the fund’s risk disclosures for issues that matter to its holdings and strategy, including:
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- Technology and commercial risk: rapid technological change, competition, and uncertainty about whether companies can develop and commercialize products.
- Company and sector concentration: exposure to a limited group of issuers or related industries can make results depend heavily on those businesses and sectors.
- Intellectual-property and regulatory risk: QTUM’s prospectus identifies dependence on intellectual property and regulation among relevant risks.
- Liquidity and valuation risk: underlying holdings may be difficult to value or trade, and ETF shares may trade away from NAV.
- Potential loss: the QTUM prospectus states that investors could lose all or part of their investment.
Read the fund’s full current prospectus for its complete risk list rather than assuming the risks above are exhaustive. QTUM’s summary prospectus is dated April 30, 2026, and its statutory prospectus was supplemented June 29, 2026: QTUM statutory prospectus and supplement.
A practical pre-investment checklist
- Read the mandate. Find the latest prospectus and establish whether the fund follows an index or is actively managed.
- Define the exposure you want. Check whether eligibility includes machine learning, semiconductor suppliers, enabling software, or post-quantum security, as well as direct quantum-computing activity.
- Review current holdings. Use the latest issuer holdings and sector data. Note the date, and distinguish direct quantum businesses from broader technology exposure.
- Measure concentration. Review the largest positions and sector allocations to see how much the portfolio depends on a small number of companies or industries.
- Compare costs on the same basis. Record expense ratios, turnover reporting periods, and any relevant trading costs for each fund.
- Check trading conditions. Close to the time you trade, review volume, bid-ask spread, and premium or discount to NAV.
- Read the risks and decide whether they fit. Consider whether the fund’s technology, concentration, liquidity, and valuation risks are acceptable for your own circumstances.
Fund documents, holdings, expenses, and trading conditions can change. The examples here establish distinct approaches for QTUM and CQTM, not a complete current universe or a basis for ranking them. Verify the latest primary fund information before investing.
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