---
title: "Quantum Computing Sector Slides in Overnight Session, IONQ Down 5.24%, QBTS Falls 8.25%"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/294301850.md"
description: "The quantum computing sector showed weakness in the overnight session with major stocks closing lower. IONQ dropped 5.24% to $32.22, QBTS fell 8.25% to $16.38, while RGTI and QUBT also declined, reflecting bearish sentiment."
datetime: "2026-07-30T04:47:21.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/294301850.md)
  - [en](https://longbridge.com/en/news/294301850.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/294301850.md)
generator: "portal-rs"
---

# Quantum Computing Sector Slides in Overnight Session, IONQ Down 5.24%, QBTS Falls 8.25%

The quantum computing sector faced selling pressure during the overnight session, with major stocks closing lower across the board. As of press time, sector leader IONQ.US was quoted at $32.22 in overnight trading, down 5.24% from the previous close of $31.99. QBTS.US traded at $16.38, marking an 8.25% decline, underperforming the sector average.

Among other stocks, RGTI.US fell 6.82% to $13.31 in overnight trading, while QUBT.US dropped 9.02% to $7.37. Looking at the full session, all four stocks showed significant declines during regular trading hours, with QBTS and RGTI both falling more than 8% intraday, indicating heightened risk aversion among investors in quantum computing concepts. Overnight trading volume contracted relative to regular hours, but selling pressure persisted, pushing the sector's overall center of gravity lower.

Market observers noted that volatility in the quantum computing sector has intensified recently, with investor concerns about technological commercialization progress and valuation levels further released during after-hours and overnight sessions. Although some stocks attempted a rebound in pre-market trading, they failed to reverse the day's weak pattern. Future performance will depend on whether companies within the sector can release positive news to boost market confidence.

### Related Stocks

- [IONQ.US](https://longbridge.com/en/quote/IONQ.US.md)
- [QBTS.US](https://longbridge.com/en/quote/QBTS.US.md)
- [RGTI.US](https://longbridge.com/en/quote/RGTI.US.md)
- [QUBT.US](https://longbridge.com/en/quote/QUBT.US.md)

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- [Rigetti CFO Jeffrey Bertelsen sells 25,000 shares for $375,010](https://longbridge.com/en/news/298071727.md)
- [D-Wave Quantum Just Got a 240x Boost From AT&T. How to Play QBTS From Here.](https://longbridge.com/en/news/295119837.md)
- [Quantum Computing Sector Rallies Intraday, IONQ Up Nearly 7%, QBTS Surges Over 7%](https://longbridge.com/en/news/294376900.md)
- [QUBT Earnings Are Due Today. Here's What Investors Need to See](https://longbridge.com/en/news/295389650.md)
- [Quantum Computing Inc. (QUBT) Revenue Soars in Q2, but Costs Are Rising Fast](https://longbridge.com/en/news/295510962.md)

---
> **Disclaimer: This article is for reference only and does not constitute any investment advice.**