---
title: "U.S. stock market midday update: Infleqtion rises 34.49%, with dual benefits from quantum computing policy support and technological breakthroughs igniting market confidence"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/287231746.md"
description: "Infleqtion rose 34.49%; SanDisk rose 2.34%, with a transaction volume of USD 1.762 billion; Apple fell 0.10%, with a transaction volume of USD 1.031 billion; IonQ rose 8.27%, with a transaction volume of USD 618 million; Seagate Technology rose 3.98%, with a market value of USD 175.2 billion"
datetime: "2026-05-21T13:43:23.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/287231746.md)
  - [en](https://longbridge.com/en/news/287231746.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/287231746.md)
---

# U.S. stock market midday update: Infleqtion rises 34.49%, with dual benefits from quantum computing policy support and technological breakthroughs igniting market confidence

**U.S. Stock Market Midday Update**

Infleqtion rose 34.49%, with increased trading volume. Based on recent key news:

1.  On May 21, Infleqtion signed a letter of intent with the U.S. Department of Commerce, securing $100 million in funding support. This move aims to accelerate the development of quantum computing technology, driving up the company's stock price. Source: Jin Shi Data
    
2.  On May 21, the Trump administration announced a $2 billion investment in nine quantum computing companies, including Infleqtion. This news led to a collective rise in the stock prices of related companies. Source: The Wall Street Journal
    
3.  On May 21, Infleqtion announced a technological breakthrough, enhancing its neutral atom quantum computing platform, further boosting market confidence. Source: INFQ Stock News The investment boom in the quantum computing industry continues, with increased policy support.
    

**Stocks with High Trading Volume in the Industry**

SanDisk rose 2.34%. Based on recent key news:

1.  On May 19, Citibank significantly raised SanDisk's target price to $2,025, reflecting the expansion of AI infrastructure and increased spending on data centers, driving up NAND demand. Citibank maintained a "Buy" rating, expecting tight supply and demand in the NAND market to continue until 2027, which contributed to the rise in SanDisk's stock price. Source: Citibank Research
    
2.  On May 19, strong demand in the storage chip market led to a surge in SanDisk's stock price. The investment boom in AI data centers has resulted in tight storage chip capacity, creating a favorable supply environment that pushed SanDisk's stock price higher. Source: MoneyDJ News
    
3.  On May 20, institutional funds flowed into the storage and equipment sector, benefiting SanDisk. Wall Street logic drove concentrated capital inflows into the storage and equipment industry, resulting in an increase in SanDisk's stock price. Source: Zhitong Finance Strong demand for storage chips, market capital inflow
    

Apple fell 0.10%, with a trading volume of $1.031 billion. Based on recent key news:

1.  On May 18, an Indian court required Apple to fully cooperate with an antitrust investigation and rejected its request for a delay in proceedings. This move increases Apple's regulatory risk in the Indian market, potentially affecting its business expansion.
    
2.  On May 18, production of Apple's first foldable phone faced obstacles, and the trial production plan may be delayed. Although the screen crease issue has been resolved, the hinge design did not meet standards, affecting the product launch.
    
3.  On May 19, Apple lowered the prices of some iPhone 17 models in the Chinese market in an attempt to boost market share. After the price reduction, sales significantly increased, indicating consumer sensitivity to price. The overall outlook for tech stocks is optimistic, with positive capital flows.
    

IonQ rose 8.27%. Based on recent key news:

1.  On May 21, StoneX's benchmark division will hold a quantum computing summit in the Washington area on June 16-17, including a tour of IonQ's quantum computing laboratory and company showcase, enhancing market attention on IonQ and driving up its stock price
    
2.  On May 20, IonQ announced a record first-quarter financial report, with GAAP revenue reaching $64.7 million, a year-on-year increase of 755%. Remaining performance obligations grew 554% to $470 million, and the strong financial performance boosted investor confidence.
    
3.  On May 18, the quantum computing sector showed strong momentum, with frequent technical milestones, accelerated order fulfillment, and clear demand for AI-assisted optimization. The market expects rapid growth in the global quantum computing market, and IonQ, as a leading company, exceeded expectations, driving renewed interest in the sector. The overall performance of the quantum computing sector was strong, with significant policy support.
    

**Stocks ranked among the top in industry market capitalization**

Seagate Technology rose 3.98%. Based on recent news:

1.  On May 18, the CEO of Seagate Technology stated at the JP Morgan conference that capacity expansion is slow and cannot meet AI demand, leading to a 6.9% drop in stock price. This statement raised market concerns about insufficient memory capacity, dragging down related sectors across the board. Source: Hong Kong Economic Journal
    
2.  On May 19, tensions in the Middle East led to a surge in oil prices, impacting the global economy and undermining confidence in tech stocks. Brent crude oil prices reached $112 per barrel, increasing market uncertainty regarding energy supply. Source: Zhitong Finance
    
3.  On May 19, global bond market volatility intensified, with Morgan Stanley strategists warning that bond market sell-offs could affect stock market gains. U.S. stocks may face significant adjustments, and the market needs to pay attention to solutions for Middle East issues. Source: Wall Street Insight Tech stocks are affected by AI demand, leading to increased volatility

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## Related News & Research

- [Why Did IonQ Stock Pop Today?](https://longbridge.com/en/news/287244531.md)
- [Infleqtion’s Quantum Funding And Defense Trials Set Against Share Pullback](https://longbridge.com/en/news/287252852.md)
- [Rigetti signs letter of intent with the US government for quantum computing research](https://longbridge.com/en/news/287211872.md)
- [Why quantum computing stock skyrocketed this week](https://longbridge.com/en/news/286690728.md)
- [IonQ (IONQ) Is Building the Real Deal in Quantum but at a Steep Price](https://longbridge.com/en/news/287035438.md)