IonQ, Rigetti Computing, D-Wave Quantum, and Quantum Computing Inc. Are Sending Shockwaves Through Wall Street With This $895 Million Warning

Quantum-computing pure plays IonQ, Rigetti Computing, D-Wave Quantum and Quantum Computing Inc. have risen by as much as 1,820% over the past two years. The outsized gains signal strong investor enthusiasm for the quantum-computing theme, though the move also suggests elevated speculative positioning in a volatile emerging-technology segment.