Why Did Quantum Computing Stocks IONQ, QBTS, RGTI and QUBT Plunge Wednesday?

Quantum computing stocks fell sharply on Wednesday, as surging U.S. Treasury yields pressured speculative technology shares. IonQ Inc. (IONQ) dropped 4.50%, D-Wave Quantum Inc. (QBTS) lost 3.61%, Rigetti Computing Inc. (RGTI) fell 3.82%, and Quantum Computing Inc. (QUBT) declined 3.05%. The selloff came as the 10-year Treasury yield briefly reached 5.36%, its highest level since 2002, raising fresh concerns about borrowing costs and valuations for companies whose commercial potential remains largely in the future.

The weakness extended across the quantum sector. Infleqtion Inc. (INFQ) fell 7.18%, while Xanadu Quantum Technologies Limited (XNDU) plunged 11.26%. Quantinuum (QNT) also declined 3.01%, showing how broadly the selling spread.