05/04/2026: XNDU割韭菜了，增发股票暴跌60%。好在行业整体还算稳定小赚20%。不过不看这种短线，这个赌的是超长线，往退休里放。
持仓清单列一下吧：
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onQ (IONQ)
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D-Wave (QBTS)
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Infleqtion (INFQ)
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Xanadu (XNDU)
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Rigetti (RGTI)
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Quantum Computing Inc. (QUBT)
04/03/2026: 【XNDU正在爆拉中，已开仓试水买入纯量子计算的股票】
I would use two rankings, because “best investment” depends on whether you want risk-adjusted exposure or direct pure-play upside.
A. Best risk-adjusted public quantum investments
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IBM — best mix of real quantum operating presence, full-stack control, and non-binary downside protection. IBM already has broad platform access, a large network, and a credible roadmap, so you are not paying purely for hope.
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IonQ — best direct public pure-play. It has by far the strongest 2025 revenue among the pure-plays, large cash reserves, broad cloud distribution, and a more complete platform story than just “one hardware bet.”
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Microsoft — very strong risk-adjusted optionality because Azure can monetize the ecosystem even before Microsoft’s own hardware wins; Majorana 1 gives it real upside if topological qubits work.
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NVIDIA — not a quantum pure-play, but one of the most plausible winners if the sector remains hybrid for many years. CUDA-Q and the new Ising models position NVIDIA as infrastructure rather than a single-modality bet.
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Honeywell — best hidden-asset play because you get indirect ownership of Quantinuum without taking single-company quantum startup risk. The planned IPO path is the key catalyst.
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D-Wave — strongest smaller-name commercialization case today, especially in optimization and hybrid workflows, but annealing is a narrower thesis than general fault-tolerant QC.
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Amazon — good platform toll-collector, but quantum is still a small piece of the AMZN thesis.
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Alphabet — world-class quantum R&D, but the stock is still mostly an AI/search/cloud advertising investment rather than a clean quantum vehicle.
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Infleqtion — attractive neutral-atom and government/sensing mix, but the story is less purely “quantum computing platform” than IonQ or IBM.
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Xanadu — the most interesting public photonics name, but still very early and newly public.
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Rigetti — credible superconducting technology and improving systems, but commercial scale still trails IonQ and D-Wave.
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QUBT — too speculative for me as a core holding given the current revenue base.
B. Best direct public pure-play quantum stocks
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IonQ (IONQ)
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D-Wave (QBTS)
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Infleqtion (INFQ)
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Xanadu (XNDU)
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Rigetti (RGTI)
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Quantum Computing Inc. (QUBT)
That order reflects how I would weight commercial traction, balance-sheet strength, platform breadth, and technology credibility today. IonQ leads on scale and capital, D-Wave on near-term enterprise deployment, Infleqtion on neutral-atom plus software/sensing breadth, Xanadu on photonics optionality, Rigetti on superconducting progress, and QUBT remains the most speculative relative to present commercialization.
What I would do
If I were investing in quantum today, I would not make it a single-stock bet. I would treat the space as a barbell:
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Core exposure: IBM, Microsoft, NVIDIA, and Honeywell for lower-risk participation in the buildout. These names can still win even if the eventual hardware winner is someone else.
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Direct upside: IonQ as the main pure-play position, with a smaller allocation to D-Wave.
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Speculative satellites only: Infleqtion and Xanadu if you want neutral-atom and photonics exposure; Rigetti only if you specifically want a superconducting-chiplet bet; QUBT only as a high-risk flyer.
In plain English: IBM is my best overall public quantum name today, and IonQ is my best pure-play quantum stock today.
