Prediction: This Quantum Computing Stock Is Going to Plummet in the Second Half of 2026 - Yahoo Finance

Prediction: This Quantum Computing Stock Is Going to Plummet in the Second Half of 2026 Anthony Di Pizio, The Motley Fool Thu, June 18, 2026 at 5:12 AM EDT 5 min read RGTI -0.47% NVDA -4.13% Last month, the U.S. government announced plans to acquire equity stakes in nine different quantum computing companies, providing $2 billion in total funding to help America build a leadership position in this important industry. Rigetti Computing (NASDAQ: RGTI) will receive a $100 million investment over three years, and its stock has jumped by 20% since the news broke. Quantum computers can use a concept called superposition to simulate multiple solutions to a given problem at once, so they are more efficient at processing specific workloads compared to traditional computers, especially in areas like science and cryptography. Rigetti makes some of the industry's best quantum systems, but they still make far too many errors to solve most real-world problems. Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same "Total Conviction" signal is flashing for a company 1/100th the size of Nvidia. Continue » While the U.S. government's backing is great news, Rigetti still generates a very small amount of revenue relative to its market capitalization. Here's why I predict its elevated valuation will lead to a 50% (or more) decline in its stock price during the second half of this year. Image source: Getty Images. It could be decades before quantum computers are truly useful Rigetti is uniquely positioned to lead the quantum industry because it has built its own supply chain, which means it can bring new computers to market much faster than its competitors. It operates its own fabrication facility, developed its own quantum programming language called Quil, and it has also built a cloud platform where it rents quantum computing capacity to other businesses for a fee. Rigetti's flagship Cepheus-1-108Q quantum computer is the industry's largest multichip system. With 108 qubits, it delivers three times the scale of the company's previous Cepheus-1-36Q system, while boasting a median single-qubit gate fidelity of 99.9%. That means it makes just one error per every 1,000 quantum operations. But its two-qubit gate fidelity is 99.1%, implying nine errors per 1,000 operations, so it's still impractical for solving many real-world problems. Making multiple qubits work together in harmony is one of the biggest challenges in quantum computing, because they are highly sensitive to noise and interference. Rigetti believes it can upgrade Cepheus-1-108Q to achieve a two-qubit fidelity of 99.5% this year, but the company says a system with a two-qubit fidelity of 99.9% could be three years away. Story Continues View Comments Terms and Privacy Policy Privacy Dashboard