During the regular trading session on Wednesday (July 22), the U.S. quantum computing sector displayed a mixed performance. As of press time, major stocks in the sector showed divergent trends, with IonQ demonstrating relative resilience while D-Wave Quantum and Quantum Computing Inc experienced notable pullbacks.

In terms of specific stocks, IonQ (IONQ.US) was last traded at $34.795, down 2.01% from the previous closing price. The stock saw active trading with a volume of 11.71 million shares and a turnover exceeding $414 million. Rigetti Computing (QBTS.US) was quoted at $17.310, declining 2.75%, with a trading volume of 11.83 million shares. Rigetti Computing (RGTI.US) performed relatively steadily, currently at $15.216, edging down 0.42%, almost flat compared to the previous session. Notably, its trading volume surged significantly to 27.59 million shares, with a high turnover of $422 million, indicating intense capital contention.

Regarding other constituents in the sector, Quantum Computing Inc (QUBT.US) led the declines, trading at $7.805, down 5.05%, with a volume of 6.07 million shares. Overall, the quantum computing concept lacked a unified direction during today's regular session, with individual stock performance driven more by respective capital flows. Investors should monitor changes in overall sector sentiment moving forward.