---
title: "U.S. stock night trading fluctuations: Arm rose 3.67% in after-hours trading, boosted by better-than-expected earnings report and Citigroup raising its rating"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/294456149.md"
description: "Arm rose 3.67% in the after-hours market; Micron Technology rose 3.98% in the after-hours market, with a transaction volume of USD 810 million; SK Hynix rose 6.34% in the after-hours market, with a transaction volume of USD 354 million; NVIDIA rose 1.79% in the after-hours market, with a transaction volume of USD 9.48 million"
datetime: "2026-07-31T04:57:56.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/294456149.md)
  - [en](https://longbridge.com/en/news/294456149.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/294456149.md)
---

# U.S. stock night trading fluctuations: Arm rose 3.67% in after-hours trading, boosted by better-than-expected earnings report and Citigroup raising its rating

**U.S. Stock Market Night Trading Movements**

Arm rose 3.67% in night trading. Based on recent key news:

1.  On July 30, Arm announced its Q1 FY2027 financial report, with revenue of $1.29 billion, a year-on-year increase of 22%, exceeding market expectations. The company expects Q2 revenue to be between $1.33 billion and $1.43 billion, with analysts estimating $1.35 billion. After the release of this financial report, the stock price rebounded from a 7% drop to an increase of over 8% in pre-market trading. Source: Guandian.com
    
2.  On July 30, Citigroup's research report pointed out that Arm's cloud AI and licensing businesses are experiencing strong growth, offsetting the impact of weak demand in the mobile market. Citigroup raised its revenue and operating profit forecasts for FY2027 by 1% and 4% respectively, maintaining a "Buy" rating with a target price of $300. Source: Citigroup
    
3.  On July 30, analysts maintained a stable rating for Arm, but lowered the target price. RBC Capital, TD Cowen, and Wells Fargo all maintained a buy rating but lowered their target prices to $340, $350, and $280 respectively. Source: Benzinga Pro The chip industry is facing stricter scrutiny, increasing risks.
    

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

Micron Technology rose 3.98% in night trading. Based on recent key news:

1.  On July 30, Samsung Electronics announced record profits and sales for Q2, expecting chip shortages to continue until 2028, driving Micron's stock price up by 16%. Source: Benzinga
    
2.  On July 28, Changxin Technology was listed on the Shanghai Stock Exchange's STAR Market, prompting global investors to reassess the competitive landscape of the DRAM industry, leading to a decline in Micron's stock price. Source: Benzinga
    
3.  On July 31, Microsoft released a strong financial report, boosting the rebound of U.S. stocks, with Micron's stock price rising by 18.4%. Source: Associated Press AI demand drives growth in memory chip demand.
    

SK Hynix rose 6.34% in night trading. Based on recent key news:

1.  On July 29, SK Hynix announced its quarterly financial report, with operating profit increasing by 557% to 60.5 trillion won, a record high, but below the market expectation of 64 trillion won. Despite record profits, the shortfall raised market concerns, leading to stock price fluctuations. Source: SK Hynix official website
    
2.  On July 29, SK Group Chairman Choi Tae-won purchased 3,600 shares of SK Hynix, showing confidence in the company's future development, which drove the stock price up. Source: SK Hynix official website
    
3.  On July 29, Kis raised the target price for SK Hynix by 24% to 4.7 million won, with analysts generally optimistic about its future performance, boosting market confidence. Source: Kis analysis report Strong demand in the semiconductor industry, continuous AI investment Nvidia rose 1.79% in after-hours trading. Based on recent news,
    
4.  On July 27, semiconductor stocks faced a collective sell-off, causing Nvidia's stock price to drop by about 5%. The Philadelphia Semiconductor Index fell by 2.2%, leading to Nvidia's market value decreasing to $4.76 trillion, with Apple surpassing it to reclaim the title of the world's most valuable company.
    
5.  On July 28, Nvidia negotiated with OpenAI to provide approximately $250 billion in funding support for its large-scale data center project. This news raised market concerns about cyclical financing and massive capital expenditures, leading to a decline in stock prices.
    
6.  On July 28, Nvidia signed a leasing agreement for a Texas data center worth up to $50 billion. This center will utilize Nvidia chips, further accelerating its investment pace. There are clear signs of market deleveraging, posing challenges for technology stocks

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- [ARM.US](https://longbridge.com/en/quote/ARM.US.md)
- [SOXL.US](https://longbridge.com/en/quote/SOXL.US.md)

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