Quantum computing stocks soar: IonQ, D-Wave, Rigetti, and QUBT are rising today. But why—and will it last?

The stock prices of the so-called Quantum Four are back on the rise today, after already accruing significant gains yesterday as well.

The upward trend is a reversal for IonQ, D-Wave, Rigetti, and Quantum Computing Inc., which have all seen their shares decline since the beginning of the year.

Why are they on the rise again? Here’s what you need to know:

What’s happened?

Yesterday, the stock prices of America’s four largest publicly traded quantum computing companies all rose significantly.