---
title: "U.S. stock market midday update: Founder rises 17.5% with increased volume but no positive news; is the influx of funds a volatility trap?"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/288307409.md"
description: "Founder rose 17.50%; Comfort Systems USA Inc. fell 0.75%, with a transaction volume of USD 406 million; Quanta Services fell 3.00%, with a transaction volume of USD 383 million; Mastec fell 4.11%, with a transaction volume of USD 213 million; Ferrovial SE fell 3.10%, with a market value of USD 47.4 billion"
datetime: "2026-06-01T16:57:43.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/288307409.md)
  - [en](https://longbridge.com/en/news/288307409.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/288307409.md)
---

# U.S. stock market midday update: Founder rises 17.5% with increased volume but no positive news; is the influx of funds a volatility trap?

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

Founder, up 17.50%, with increased trading volume and no significant news recently. Trading is active, with clear capital flow. Considering sector and industry trends, the stock shows significant volatility, and specific reasons need further observation.

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

Comfort Systems USA Inc. down 0.75%. Based on recent key news:

1.  On May 30, MarketBeat's analysis showed that although Comfort Systems USA Inc. received a buy rating, top analysts believe there are five stocks that are more worthy of investment. This news may weaken investor confidence in the company, affecting its stock price.
    
2.  No other significant news recently. The overall market is volatile, and macroeconomic data should be monitored.
    

Quanta Services down 3.00%. Based on recent key news:

1.  On June 1, Quanta Services plays a key role in AI infrastructure, but its stock price may have advanced too much. Analysts believe its valuation is too high, leading to a decline in stock price.
    
2.  On June 1, MarketBeat pointed out that Quanta Services was not included in the list of five stocks recommended by top analysts, despite its rating being moderately buy, which weakened market confidence.
    
3.  On May 31, a report from Motley Fool indicated that although Quanta Services was recommended, its performance did not meet market expectations, affecting investor sentiment. The high valuation in the AI industry has intensified market volatility.
    

Mastec down 4.11%. Based on recent key news:

1.  On June 1, Zacks recommended Mastec as a strong buy stock due to its potential in AI infrastructure growth. This recommendation increased market attention on Mastec but failed to prevent the stock price from declining.
    
2.  On May 31, major U.S. indices reached all-time highs, driven by strong earnings and AI investments. Despite the overall market performing well, Mastec's stock price remains under pressure.
    
3.  On May 30, hopes for resolving the Middle East conflict increased, boosting overall market sentiment. However, Mastec failed to benefit from this, and its stock price continued to decline. AI infrastructure investment is driving positive market sentiment.
    

**Stocks with High Market Capitalization in the Industry**

Ferrovial SE down 3.10%. No significant news recently; trading is active, with clear capital flow. Considering sector and industry trends, the stock shows significant volatility, and specific reasons need further observation. no\_news

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- [FGL.US](https://longbridge.com/en/quote/FGL.US.md)
- [FIX.US](https://longbridge.com/en/quote/FIX.US.md)
- [PWR.US](https://longbridge.com/en/quote/PWR.US.md)
- [MTZ.US](https://longbridge.com/en/quote/MTZ.US.md)
- [FER.US](https://longbridge.com/en/quote/FER.US.md)

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