---
title: "Why Did Quantum Computing Stocks IONQ, QBTS, RGTI and QUBT Plunge Wednesday?"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/301243784.md"
description: "Quantum computing stocks, including IONQ, QBTS, RGTI, and QUBT, plunged on Wednesday due to surging U.S. Treasury yields reaching a multi-decade high. The spike in the 10-year yield raised concerns about borrowing costs and valuations for speculative tech firms with future commercial potential. The selloff was broad, affecting peers like Infleqtion, Xanadu, and Quantinuum."
datetime: "2026-10-08T08:38:00.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/301243784.md)
  - [en](https://longbridge.com/en/news/301243784.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/301243784.md)
generator: "portal-rs"
---

# Why Did Quantum Computing Stocks IONQ, QBTS, RGTI and QUBT Plunge Wednesday?

Quantum computing stocks fell sharply on Wednesday, as surging U.S. Treasury yields pressured speculative technology shares. IonQ Inc. (IONQ) dropped 4.50%, D-Wave Quantum Inc. (QBTS) lost 3.61%, Rigetti Computing Inc. (RGTI) fell 3.82%, and Quantum Computing Inc. (QUBT) declined 3.05%. The selloff came as the 10-year Treasury yield briefly reached 5.36%, its highest level since 2002, raising fresh concerns about borrowing costs and valuations for companies whose commercial potential remains largely in the future.

The weakness extended across the quantum sector. Infleqtion Inc. (INFQ) fell 7.18%, while Xanadu Quantum Technologies Limited (XNDU) plunged 11.26%. Quantinuum (QNT) also declined 3.01%, showing how broadly the selling spread.

### Related Stocks

- [CCCX.US](https://longbridge.com/en/quote/CCCX.US.md)
- [INFQ.US](https://longbridge.com/en/quote/INFQ.US.md)
- [IONQ.US](https://longbridge.com/en/quote/IONQ.US.md)
- [QBTS.US](https://longbridge.com/en/quote/QBTS.US.md)
- [QNT.US](https://longbridge.com/en/quote/QNT.US.md)
- [QUBT.US](https://longbridge.com/en/quote/QUBT.US.md)
- [RGTI.US](https://longbridge.com/en/quote/RGTI.US.md)
- [XNDU.US](https://longbridge.com/en/quote/XNDU.US.md)
- [88636W247.US](https://longbridge.com/en/quote/88636W247.US.md)
- [INFH.US](https://longbridge.com/en/quote/INFH.US.md)
- [IONC.US](https://longbridge.com/en/quote/IONC.US.md)
- [IONL.US](https://longbridge.com/en/quote/IONL.US.md)
- [IONX.US](https://longbridge.com/en/quote/IONX.US.md)
- [IONZ.US](https://longbridge.com/en/quote/IONZ.US.md)
- [IOYY.US](https://longbridge.com/en/quote/IOYY.US.md)
- [QBTX.US](https://longbridge.com/en/quote/QBTX.US.md)
- [QBTZ.US](https://longbridge.com/en/quote/QBTZ.US.md)
- [QBY.US](https://longbridge.com/en/quote/QBY.US.md)
- [QNTU.US](https://longbridge.com/en/quote/QNTU.US.md)
- [QPUX.US](https://longbridge.com/en/quote/QPUX.US.md)
- [QUA.US](https://longbridge.com/en/quote/QUA.US.md)
- [QUBX.US](https://longbridge.com/en/quote/QUBX.US.md)
- [RGTC.US](https://longbridge.com/en/quote/RGTC.US.md)
- [RGTU.US](https://longbridge.com/en/quote/RGTU.US.md)
- [RGTX.US](https://longbridge.com/en/quote/RGTX.US.md)
- [RGTZ.US](https://longbridge.com/en/quote/RGTZ.US.md)
- [RGYY.US](https://longbridge.com/en/quote/RGYY.US.md)
- [XNDX.US](https://longbridge.com/en/quote/XNDX.US.md)
- [XQTM.US](https://longbridge.com/en/quote/XQTM.US.md)

## Related News & Research

- [Are These 3 Quantum Computing Stocks Worth Buying Before 2027?](https://longbridge.com/en/news/303836676.md)
- [How $7.5 Million AFRL Contract Will Impact IonQ (IONQ) Investors](https://longbridge.com/en/news/303459895.md)
- [Throwback to D-Wave stock's volatile outlook](https://longbridge.com/en/news/303777211.md)
- [IonQ Receives $7.5 Million in Follow-On Funding From AFRL for Quantum Networking](https://longbridge.com/en/news/303217609.md)
- [D Wave Quantum (QBTS) Stock Looks Overvalued Despite Its Huge Three Year Run](https://longbridge.com/en/news/303329819.md)

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