# IonQ shares surge on quantum error breakthrough

> IonQ announced the quantum computing industry's first real-time error decoder, sending its stock up more than 5% and lifting the broader sector.
- Title: IonQ shares surge on quantum error breakthrough · CNBC
- Summary: IonQ announced the quantum computing industry's first real-time error decoder, sending its stock up more than 5% and lifting the broader sector. IonQ…
- Keywords: ionq, quantum computing, error correction, stock market, technology breakthrough, business, finance, shares, surge, quantum, error, breakthrough
- Source: CNBC — https://cnbc.com/2026/09/23/ionq-shares-rally-after-company-says-it-made-a-major-quantum-computing-breakthrough.html
- Author: Caleigh Keating
- Published: 2026-09-23T12:35:15+00:00
- Read time: 1 min
- Topics: ionq, quantum computing, error correction, stock market, technology breakthrough, business, finance
## IonQ announces quantum breakthrough
IonQ announced Tuesday it demonstrated the quantum computing industry's first end-to-end real-time quantum error decoder, a major milestone for the sector.
## How the decoder works
The decoder allows a single standard computer processor to find, fix and decode computer errors as they happen while running continuously in the background.
## Solving an industry problem
Previous quantum systems became easily overwhelmed fixing errors, causing delays. The successful test addresses this significant bottleneck in the industry.
## IonQ's research lead responds
Nicolas Delfosse, quantum research lead at IonQ, called validating real-time decoding across hundreds of logical qubits an important milestone for commercial-scale quantum computing.

> Successfully validating real-time decoding across hundreds of logical qubits and over millions of logical operations is an important milestone.
## Stock market reaction
IonQ shares rose more than five percent in morning trading Wednesday after surging over ten percent before the bell. Quantum stocks broadly rose in premarket trading.
## IonQ's position strengthens
IonQ partners with Amazon Web Services, Nvidia and AstraZeneca. The company recently raised full-year revenue guidance after acquiring semiconductor manufacturer SkyWater Technology.
## Key takeaway

IonQ demonstrated the quantum computing industry's first real-time error decoder, a breakthrough that fixes computer errors as they happen and sent its shares up more than five percent.