During the overnight session on July 30 Eastern Time, the quantum computing sector showed strong performance with mainstream stocks rising collectively. As of press time, all four component stocks in the sector traded higher, indicating significantly improved market sentiment.

Specifically, IONQ.US stood out in the overnight session, last trading at $36.83, up 2.96% from the previous close of $35.77, with an intraday high of $36.96. QBTS.US followed closely, trading at $18.36 in the overnight session, gaining 2.11% with active turnover. RGTI.US and QUBT.US also moved in sync, recording overnight gains of 1.88% and 1.12% respectively, closing at $15.14 and $8.11. Looking at the full day's performance, the sector established a bullish tone during regular trading hours, with IONQ and QBTS surging 11.82% and 11.12% respectively. Overnight capital continued the bullish momentum, pushing prices higher.

Analysts point out that rising expectations of technological breakthroughs in the quantum computing field have driven valuation repairs for related stocks. As the overnight session progresses, although trading volume has decreased compared to regular hours, buying intent remains firm, suggesting the sector will likely maintain a volatile but strong trend in the near term.