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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →A quantum computing ETF is an exchange-traded fund that invests in publicly traded companies selected for their connection to quantum computing or related technologies. The label does not describe one standard portfolio: funds can include different businesses, follow different selection rules, and take different approaches. To understand what a particular fund owns, look at its prospectus and, for an index fund, the benchmark’s methodology.
What a quantum computing ETF invests in
These funds offer exposure to stocks associated with quantum computing, but “associated” can mean different things. Depending on the fund, eligible companies may work on quantum hardware, components, software, algorithms, networking, sensing, or security. Some mandates also include machine learning, specialized semiconductors, or post-quantum cryptography. Those adjacent activities can make a fund broader than a portfolio of companies focused solely on building quantum computers.
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For example, Defiance Quantum ETF (QTUM) tracks an index covering quantum computing and machine learning, while Corgi Quantum Computing ETF (CQTM) describes a mandate that includes quantum-enabled technologies and related security solutions. BlackRock’s QANT is an international UCITS fund benchmarked to the STOXX Global Quantum Computing Index. These are distinct strategies, not interchangeable definitions of the theme. Defiance QTUM Defiance prospectus Corgi summary prospectus BlackRock QANT
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Index-tracking funds
An index ETF aims to track a stated benchmark before fees and expenses. The index rules determine which companies qualify, how holdings are weighted, and when the index is reviewed or rebalanced. The Defiance Quantum ETF says it follows the BlueStar Quantum Computing and Machine Learning Index. Its prospectus describes a modified equal-weighted portfolio, screening of globally listed companies based on business activity, semi-annual screening, and different market-capitalization thresholds for quantum-computing and machine-learning-related companies. A passive fund generally follows those rules rather than selling a constituent simply because its adviser expects it to underperform. Defiance prospectus
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Actively managed funds
An active ETF gives its adviser discretion to choose investments within the fund’s stated mandate instead of simply tracking an index. The Corgi Quantum Computing ETF seeks capital appreciation and says that, under ordinary market conditions, it invests at least 80% of net assets in companies materially involved in quantum computing, quantum-enabled technologies, and related security solutions. The prospectus includes hardware, components, software, algorithms, networking, sensing, and post-quantum cryptography in that scope. The 80% policy and the fund’s definition describe this product; they should not be assumed to apply to other quantum ETFs. Corgi summary prospectus
How to compare quantum ETFs
Compare the fund documents rather than relying on a product name or theme label. The most useful details are:
- Objective and method: Is the fund index-tracking or active? What benchmark does it use, if any, and what does it aim to achieve?
- Definition of the theme: Does eligibility include machine learning, semiconductors, quantum-enabled applications, or post-quantum security?
- Portfolio composition: Review the holdings, issuer and sector concentration, and geographic exposure. A quantum label alone does not reveal how much of the portfolio is devoted to quantum-specific activity.
- Costs and trading: Check the latest expense ratio, brokerage costs, bid-ask spread, liquidity, and trading currency. A consistent, same-date fee comparison across the named products is not established here, so verify current issuer disclosures before comparing costs.
- Risk disclosures and instruments: Read the fund’s prospectus for index, technology, geographic, concentration, and investment-structure risks. Do not assume that every ETF uses the same instruments or risk controls.
Risks and limitations
Technology and company risk
Companies developing quantum-computing or machine-learning technologies may be affected by rapid technical change, obsolescence, competition, consumer demand, regulation, and their reliance on patents and intellectual-property rights. These risks are described in WisdomTree’s Quantum Computing Fund summary prospectus. The fund materials do not establish that the underlying companies will succeed commercially or that quantum computing will reach any particular adoption timeline. WisdomTree summary prospectus
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Index, market, and geographic risk
An index fund is affected by its methodology and review schedule as well as by broader market conditions. Defiance’s prospectus identifies quantum-computing and machine-learning investment risk, index-methodology risk, passive-investment risk, geographic risk, and geopolitical risk. A company can remain in a passive fund until it no longer meets index rules or the index is reconstituted; the adviser does not generally make discretionary sales based solely on a negative outlook. Defiance prospectus
Concentration is another consideration. BlackRock warns that QANT’s risk may be concentrated in particular sectors, countries, currencies, or companies. Cboe describes QTUP as concentrated in the quantum-computing industry and says it may obtain exposure directly or synthetically through options and swaps. That description is specific to QTUP and does not establish that other quantum ETFs use the same structures. BlackRock QANT Cboe QTUP
Investment loss
ETF shares can fall in value, and investors can lose money. A thematic focus is not a forecast of returns or a guarantee that the underlying technology will be commercially successful. Read the fund’s current prospectus and consider whether its risks fit your circumstances; this explanation is not personalized investment advice.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where to verify current fund details
Fund holdings, fees, listings, and eligibility for purchase can change, and availability varies by jurisdiction and fund structure. The cited Defiance prospectus is dated April 30, 2026, and was supplemented June 29, 2026; the WisdomTree summary prospectus is dated October 6, 2025, and was supplemented September 30, 2026; the Corgi summary prospectus is dated April 30, 2026. Check the issuer’s latest prospectus and product information before acting. QANT is identified by BlackRock as a UCITS product; do not assume a product is available in every country or brokerage account.
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