IonQ Soars 10% After Breakthrough Sends Quantum Stocks Higher - Yahoo Finance

IonQ Soars 10% After Breakthrough Sends Quantum Stocks Higher Nauman Khan Wed, September 23, 2026 at 8:29 AM EDT 1 min read 7 IONQ +5.23% RGTI -2.30% QBTS -2.88% QUBT +2.81% This article first appeared on GuruFocus. IonQ (NYSE:IONQ) shares jumped 10% in early Wednesday after the quantum computing company announced a real-time quantum error-correction breakthrough. The stock rose to $45 from its $40.74 close, while other quantum computing companies also gained. Rigetti Computing (NASDAQ:RGTI) rose 6%, D-Wave Quantum (NASDAQ:QBTS) added 4% and Quantum Computing (NASDAQ:QUBT) advanced 3%. Warning! GuruFocus has detected 4 Warning Signs with IONQ. Is IONQ fairly valued? Test your thesis with our free DCF calculator. IONQ GF Value chart IonQ said researchers successfully tested an end-to-end, real-time quantum error-correction decoder on a single standard CPU. Quantum error correction is designed to detect and correct errors caused by noise in quantum systems, helping support larger and more reliable machines. The company said its decoder was tested on benchmark circuits simulating up to 408 logical qubits and more than 31.5 million quantum operations. Under standard operating noise, the system added as little as 0.02% to execution time. IonQ said the results support its plans to scale beyond 256 physical qubits toward systems capable of controlling thousands of qubits.