---
title: "U.S. Stock Market Midday Update: Ciena falls nearly 19%: Despite exceeding earnings expectations, high valuation and profit margin concerns weigh on the sector"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/288745070.md"
description: "Ciena fell 18.78%; Lumentum Holdings fell 3.94%, with a transaction volume of USD 2.299 billion; Nokia fell 2.99%, with a transaction volume of USD 1.271 billion; Cisco rose 1.30%, with a transaction volume of USD 0.821 billion; Arista Networks fell 5.37%, with a market value of USD 207.9 billion"
datetime: "2026-06-04T15:28:53.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/288745070.md)
  - [en](https://longbridge.com/en/news/288745070.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/288745070.md)
---

# U.S. Stock Market Midday Update: Ciena falls nearly 19%: Despite exceeding earnings expectations, high valuation and profit margin concerns weigh on the sector

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

Ciena, down 18.78%, with increased trading volume. Based on recent key news:

1.  On June 4, Ciena announced its second-quarter financial report, and despite exceeding expectations, its stock price fell by 19%. Analysts pointed out that investor concerns over profit margins led to pressure on the stock price. Ciena's revenue grew by 40% year-on-year to $1.57 billion, with adjusted earnings per share increasing by 290% to $1.64. Source: Zhitong Finance
    
2.  On June 4, Ciena raised its full-year revenue guidance to $6.3 billion, exceeding market expectations. However, the market remains cautious about its high valuation, with the stock price having risen about 165% this year. Source: Wall Street Insight
    
3.  On June 4, Ciena's demand for optical communications surged due to AI data centers, with the company's CEO stating that its strategy aligns closely with AI-driven demand. Source: Jinshi Data AI demand drives growth in the optical communication industry, increasing market volatility.
    

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

Lumentum Holdings, down 3.94%. Based on recent key news:

1.  On June 4, Lumentum's stock price fell despite analysts holding a positive outlook on the company and first-quarter results exceeding expectations, as internal stock sales by the company's senior vice president and board raised market concerns, leading to a drop in stock price. Source: Zhitong Finance
    
2.  On June 3, TrendForce reported that the expansion of AI data centers is driving demand growth for EML and CW-DFBLD chips. As one of the major suppliers, Lumentum holds a 55% market share, but the market has doubts about its production capacity. Source: Jinshi Data
    
3.  On June 3, Lumentum's stock price was influenced by the AI-driven market boom, rising alongside companies like NVIDIA and Marvell, but recent market sentiment fluctuations have led to a price correction. Source: Jinshi Data AI data center expansion drives growth in optical communication demand.
    

Nokia, down 2.99%, with active trading. Based on recent key news:

1.  On June 1, Nokia launched a new 4G micro-chat phone, which sold out during the pre-sale phase, receiving positive market feedback. Although the product itself has limited revenue, its precise targeting of niche markets aligns with AI transformation, boosting market confidence.
    
2.  On June 3, Nokia's strategic transformation in the AI infrastructure sector was recognized by the market. The company focuses on underlying communication technology and patent monetization, gradually becoming an infrastructure provider in the AI era, which supported its stock price.
    
3.  On June 4, Nokia was revalued as an AI infrastructure company, with the market holding an optimistic view of its long-term growth potential. The company's enhanced position within the AI investment framework drove its stock price up. The AI investment boom drives the revaluation of tech stocks.
    

Cisco, up 1.30%. Based on recent key news:

1.  On June 4th, Cisco launched the Cisco Cloud Control Platform at the Cisco Live conference, integrating multiple existing platforms to provide unified networking, security, computing, and collaboration capabilities. This innovation enhances the efficiency of enterprise management of critical IT infrastructure, driving up stock prices. Source: Zhitong Finance
    
2.  On June 2nd, Cisco's market value first surpassed $500 billion, with stock prices increasing by 5%, reaching an all-time high. This market value breakthrough reflects the market's reassessment and recognition of Cisco in the AI infrastructure sector. Source: Golden Finance
    
3.  On June 4th, Cisco raised its annual AI order target from $5 billion to $9 billion and upgraded its AI revenue expectations. This adjustment demonstrates the company's strong growth potential in the AI field, further boosting investor confidence. Source: Zhitong Finance. The demand for AI infrastructure is growing, leading to a market reevaluation.
    

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

Arista Networks fell by 5.37%. Based on recent news,

1.  On June 3rd, Arista Networks raised its revenue guidance to $11.5 billion, primarily driven by AI-driven growth and an expanded market size. Delayed revenue mainly comes from AI deployments, with extended supply chain management times. Following this announcement, stock prices experienced fluctuations.
    
2.  On June 4th, Arista Networks expanded its market based on its leadership in Ethernet and open standards technology through innovation and strategic partnerships, while addressing ongoing supply chain challenges. Despite the company's positive outlook, market concerns over supply chain issues led to a decline in stock prices.
    
3.  On June 2nd, analysts recommended Arista Networks as one of the investment choices in AI infrastructure, despite the risk of valuation reset. Analysts' recommendations attracted market attention but also brought about short-term stock price fluctuations. AI and campus networks drive rapid growth, while supply chain challenges remain

### Related Stocks

- [CIEN.US](https://longbridge.com/en/quote/CIEN.US.md)
- [LITE.US](https://longbridge.com/en/quote/LITE.US.md)
- [NOK.US](https://longbridge.com/en/quote/NOK.US.md)
- [CSCO.US](https://longbridge.com/en/quote/CSCO.US.md)
- [ANET.US](https://longbridge.com/en/quote/ANET.US.md)

## Related News & Research

- [Ciena Delivers Blowout Q2, But Investors Sell As Guidance Rises](https://longbridge.com/en/news/288896260.md)
- [Why Ciena stock stumbled today](https://longbridge.com/en/news/289114464.md)
- [Why Ciena stock tumbled by nearly 6% on Tuesday](https://longbridge.com/en/news/289250837.md)
- [NAVER Expands AI Infrastructure With NVIDIA to Serve Surging Global AI Demand](https://longbridge.com/en/news/288974522.md)
- [Forget AI Models. This Company Sells What Every AI Giant Needs.](https://longbridge.com/en/news/289086501.md)