IonQ Cleared One of Quantum Computing's Biggest Hurdles. Should You Buy the Stock?

The quantum computing stock has seen multiple 20% swings in both directions.

On Tuesday, Sept. 22, 2026, IonQ announced that it had cleared one of quantum computing's biggest hurdles by demonstrating the first end-to-end real-time quantum error correction decoder.

The quantum computers then have to wait for the quantum error correction process to catch up.

IonQ appears to be leading the pack among quantum computing companies, at least in quantum error correction.

This quantum computing stock is a buy -- at least for some investors.