Quantum Stocks on the US Market Today: IonQ, Rigetti, D‑Wave, QCi and Arqit Slide After Close as Analyst Coverage Expands (Dec. 17, 2025)
Quantum-related stocks fell sharply after the U.S. market closed Wednesday, with IonQ down 7.69%, Rigetti off 6.14%, and D-Wave losing 6.84%. The drop followed broader tech declines and renewed concerns over an “AI bubble,” despite Wedbush initiating coverage on the sector with Outperform ratings for several names.