During the overnight session on Wednesday (July 22), the quantum computing sector saw mixed movements before turning broadly lower, with major names retreating in overnight trading. As of 3:46 AM ET on July 23, all four mainstream stocks in the sector closed lower, reflecting cautious sentiment in the post-market and overnight phases.

Specifically, IONQ.US traded at $34.77 in the overnight session, slightly up from its regular market close of $34.68. However, looking at its regular trading session performance, the stock closed at $34.68, down 2.34% from the previous close of $35.51. In overnight trading, it hovered near $34.77, showing a slight rebound from the regular market close but still down 2.03% from the previous close. QBTS.US showed weakness, trading at $17.49 in the overnight session, slightly up from the previous close of $17.35, but its regular session close of $17.35 marked a significant 2.53% drop from the previous close of $17.80. Overnight prices narrowed the decline to around 1.97% from the previous close, but the overall trend remains weak.

Among other names, RGTI.US traded at $15.16 in the overnight session, down 0.46% from the previous close of $15.23. Its regular session close of $15.23 was a slight 0.33% decline from the previous close of $15.28, showing minimal volatility throughout the day. QUBT.US led the declines, trading at $7.89 in the overnight session, down 0.25% from the previous close of $7.91. However, its regular session close of $7.91 marked a sharp 3.77% drop from the previous close of $8.22, making it the largest decliner in the sector. Overall, after a broad sell-off during regular hours, quantum computing stocks saw subdued overnight trading, with investors awaiting further industry catalysts.