How to Invest in Quantum computing

How does quantum computing work?

Quantum computing uses the rules of quantum mechanics to process information in ways classical computers cannot. A classical bit is either 0 or 1; a quantum bit, or qubit, can hold a blend of both states at once, and qubits can be linked so their states depend on each other. For certain problems, this lets a quantum machine explore many possibilities simultaneously and arrive at answers that would take a classical computer impractically long. That capability is the entire premise of the quantum computing theme.

The companies in the quantum computing theme pursue different physical ways to build qubits. IONQ uses trapped ions, RGTI uses superconducting circuits, QBTS uses a specialized annealing approach, and IBM and GOOGL run large superconducting research programs. There is no settled winner, which is part of what makes the quantum computing theme speculative: the field is still deciding which qubit technology will scale, and the answer materially affects which companies benefit.

Why is quantum computing still a speculative investment?

Quantum computing is speculative because today's machines are still small and error-prone. Qubits are fragile and lose their quantum state easily, so current systems make frequent errors and cannot yet reliably outperform classical computers on commercially valuable problems. Reaching fault-tolerant, useful quantum computing requires error correction that consumes many physical qubits to create one stable logical qubit, and scaling that up is an unsolved engineering challenge. This is why the quantum computing theme is a bet on a future breakthrough rather than on present-day earnings.

The practical consequence is a split within the quantum computing theme. The pure-play developers, IONQ, RGTI, and QBTS, are pre-profit and depend on continued funding and technical progress, so their valuations reflect potential rather than revenue. The diversified anchors, IBM and GOOGL, run serious quantum programs but earn the overwhelming majority of their money elsewhere, which cushions the speculation. Walnut is not an investment adviser, and the quantum computing theme is best understood as a small, long-horizon, high-risk tilt.

What could quantum computing be used for?

If it matures, quantum computing could tackle problems that scale badly on classical machines: simulating molecules for drug and materials discovery, optimizing complex logistics and financial portfolios, and certain cryptography-related tasks. These are the applications the quantum computing theme is ultimately priced against, and they are why large firms like IBM and GOOGL invest despite no near-term payoff. NVDA appears in the theme from a different angle, building tools and accelerated computing that simulate and connect to quantum systems.

The important caveat is timing. As of 2026, these use cases are largely demonstrations and research collaborations, not deployed commercial products generating meaningful revenue. The quantum computing theme captures the companies positioned to benefit if and when the technology becomes useful, while acknowledging that the timeline is genuinely uncertain and could stretch for years. That uncertainty is exactly why the theme sits at the speculative end of the spectrum.

What gets a stock into the Quantum computing theme?

Exposure to quantum computing hardware or software: pure-play quantum processor developers, large firms with significant quantum research programs, and the tooling and accelerated-computing companies connecting to quantum systems.

What stocks are in the Quantum computing theme?

Every public name that fits the Quantum computing thesis, with the rationale for inclusion. Click any ticker for the full stock guide. The basket above starts equal-weighted; you set your own target weights inside Walnut.

How to invest in Quantum computing

There are a few ways to get exposure to the quantum computing theme, and Walnut is not an investment adviser, so this is descriptive. The most direct path is buying individual stocks that fit the thesis, and the key choice is how much speculation you want. The pure-play developers IONQ, RGTI, and QBTS give the most concentrated exposure to quantum hardware, but they are pre-profit and highly volatile. The diversified anchors IBM and GOOGL, plus NVDA on the tooling side, give quantum research exposure inside companies with large existing businesses, which dampens the risk considerably. Mixing the two is how most people approach the quantum computing theme. The passive route is very limited: QQQ and VGT hold IBM, GOOGL, and NVDA but at weights driven by their non-quantum businesses, so the quantum exposure is negligible, and there is no pure-play quantum ETF in Walnut's valid proxy set as of early 2026.

The alternative is building a dedicated quantum computing basket in Walnut. You describe the thesis to Walnut's AI assistant, for instance quantum computing balancing large research anchors against pure-play hardware developers, and the assistant proposes constituents and starting weights drawn from names like IBM, GOOGL, NVDA, IONQ, RGTI, and QBTS, with the rationale for each. You can deliberately tune how much of the basket sits in speculative pure-plays versus diversified anchors, review and adjust every weight, and fund the basket through your own connected broker. You approve every order before it is placed; Walnut never trades for you. The quantum computing basket then tracks as a single performance line.

Which ETFs cover Quantum computing?

If you want the theme as a single ticker rather than as a basket, these are the ETFs people most commonly use. Each has trade-offs (concentration, expense ratio, sector overlap) covered in the individual ETF guides.

The bottom line on Quantum computing

Quantum computing is a long-horizon, high-uncertainty bet on a computing paradigm that could solve problems classical machines cannot, but commercial usefulness may still be years out. Exposure splits between diversified anchors with real businesses (IBM, GOOGL, NVDA) and speculative pure-plays (IONQ, RGTI, QBTS). It fits a portfolio only as a small satellite tilt, and a focused basket lets you blend the anchors with the pure-plays more deliberately than QQQ, where the quantum exposure is negligible.

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