Keith Speights, The Motley Fool
Tue, April 21, 2026 astatine 4:04 AM CDT 4 min read
One institution stands astatine the halfway of the satellite of artificial quality (AI). It's Nvidia (NASDAQ: NVDA). I fishy the GPU shaper would astir apt fertile astatine the apical of the database for galore investors if they were asked to sanction the astir important AI stock.
But what's the astir important quantum computing banal of all? Several contenders travel to mind. However, I'd reason that Nvidia deserves this honor, too. A caller improvement underscores why.
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Last week, respective of the astir salient quantum computing stocks rallied big-time. IonQ's (NYSE: IONQ) shares person skyrocketed 60% implicit the past 5 days, arsenic of the marketplace adjacent connected April 20. D-Wave Quantum's (NYSE: QBTS) banal is up 47%. Quantum Computing Inc. (NASDAQ: QUBT) and Rigetti Computing (NASDAQ: RGTI) jumped 35% and 29%, respectively.
What caused those tremendous gains? Quantum Computing Inc. and Rigetti didn't denote immoderate quality past week. D-Wave's CEO, Alan Baratz, was connected signifier astatine 2 conferences connected April 14 and 15, but his remarks didn't determination the needle overmuch for the stock.
IonQ was the lone subordinate of the radical to study large quality past week. The institution announced that it achieved a "foundational method milestone by photonically interconnecting 2 autarkic trapped-ion quantum systems." This accomplishment is simply a cardinal measurement successful scaling quantum computing beyond 1 processor. IonQ besides announced that it won a declaration from the Defense Advanced Research Projects Agency (DARPA).
However, determination was a large catalyst for each 4 quantum computing stocks -- and it came from Nvidia. On April 14, which has go known successful the quantum computing manufacture arsenic "World Quantum Day," Nvidia announced the motorboat of Ising, a caller household of open-source models for gathering quantum computers.
Nvidia CEO Jensen Huang said successful a property release, "With Ising, AI becomes the power level -- the operating strategy of quantum machines -- transforming fragile qubits to scalable and reliable quantum-GPU systems." Ising includes data, models, and tools that accelerate quantum processors.
Nvidia built its dominance successful AI not conscionable with its GPUs but besides with its software, CUDA (Compute Unified Device Architecture). The institution is taking a akin attack successful quantum computing. Its open-source level CUDA-Q, which was formerly known arsenic CUDA Quantum, is utilized by aggregate quantum hardware leaders.

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