---
title: "Quantum Computing Sector Falls in Post-Market Session, IONQ Down Nearly 6%, QBTS Down Nearly 5%"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/294271423.md"
description: "During the post-market session on Tuesday (July 29), the quantum computing sector retreated broadly. IONQ.US fell nearly 6% to $32.32, QBTS.US dropped nearly 5% to $16.44, while RGTI.US and QUBT.US also declined in sympathy."
datetime: "2026-07-29T22:46:59.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/294271423.md)
  - [en](https://longbridge.com/en/news/294271423.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/294271423.md)
generator: "portal-rs"
---

# Quantum Computing Sector Falls in Post-Market Session, IONQ Down Nearly 6%, QBTS Down Nearly 5%

During the post-market session on Tuesday (July 29), the quantum computing sector faced a broad pullback, with mainstream stocks moving lower across the board. As of press time, all four stocks in the sector recorded significant declines, as market sentiment turned cautious after the regular trading session.

**IONQ.US**, the sector leader, traded at **$32.318** in the post-market session, down approximately **1.03%** from its previous close of $31.990. Compared to its regular session close, the stock's post-market movement continued its weak intraday trend. During regular hours, the stock closed at $31.990, plunging 5.58%. In post-market trading, it hit a low of $31.710 and a high of $32.380, maintaining high trading activity.

Regarding other stocks, **QBTS.US** traded at **$16.438** post-market, up about 1.59% from its regular session close of $16.180, but remains in a deep correction zone compared to the previous close of $17.635. **RGTI.US** closed the post-market session at **$13.220**, flat compared to its regular session close but down sharply from the previous close of $14.520. **QUBT.US** traded at **$7.360**, up 0.82% from its regular session close of $7.300. Overall, after consecutive adjustments in the previous session and today's regular hours, the quantum computing sector saw some attempts to stabilize in post-market trading, but remains under selling pressure. Investors should monitor subsequent technical support levels and industry developments.

### 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.**