--- title: "U.S. stock market intraday update: Argan down 11.30% on increased volume, no announcement causing emotional fluctuations" type: "News" locale: "en" url: "https://longbridge.com/en/news/292938000.md" description: "Argan fell 11.30%; Comfort Systems USA Inc. fell 4.72%, with a transaction volume of USD 358 million; Quanta Services fell 3.40%, with a transaction volume of USD 290 million; Mastec fell 5.75%, with a transaction volume of USD 212 million; Ferrovial SE fell 1.08%, with a market value of USD 45.7 billion" datetime: "2026-07-16T18:02:36.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/292938000.md) - [en](https://longbridge.com/en/news/292938000.md) - [zh-HK](https://longbridge.com/zh-HK/news/292938000.md) generator: "portal-rs" --- # U.S. stock market intraday update: Argan down 11.30% on increased volume, no announcement causing emotional fluctuations **U.S. Stock Market Midday Update** Argan fell 11.30%, with increased trading volume. Based on recent news, 1. On July 15, Simply Wall St published an article that, while primarily based on historical data and analyst forecasts, did not include the latest company announcements or qualitative materials. This may have led to uncertainty among investors regarding Argan's future performance, triggering a decline in stock price. 2. Recently, there has been increased market attention on Argan, with trading volume rising, indicating a mix of investor interest and concern regarding the stock. 3. Due to the lack of clear company announcements or significant events, market sentiment fluctuations may be the main reason for the sharp decline in stock price. Investors should be cautious due to market sentiment volatility. **Top Stocks by Industry Trading Volume** Comfort Systems USA fell 4.72%, with a trading volume of $358 million, showing increased trading activity and no significant news recently. The stock is active, with clear capital flow, and considering sector and industry trends, it exhibits notable volatility, with specific reasons needing further observation. Quanta Services fell 3.40%. Based on recent news, 1. On July 16, Quanta Services announced a dividend of R$0.03 per unit for the second quarter of 2026. The stock went ex-dividend on June 30 and will be paid on July 17. This news may have led some investors to sell shares before the ex-dividend date, causing the stock price to decline. 2. On July 15, Quanta Services announced a dividend of R$0.03 per BDR for BDR holders, with a payment date of July 17. This news may have raised market concerns about the company's cash flow, leading to a decline in stock price. 3. On July 15, analyst ratings indicated that Quanta Services currently has a moderate buy rating, but top analysts believe there are five other stocks that are more worthy of investment. This may have weakened market confidence in Quanta Services, contributing to the decline in stock price. Concerns about the company's cash flow have increased. MasTec fell 5.75%. Based on recent news, 1. On July 16, MasTec announced it will release its second-quarter earnings report on July 30 and hold a management webcast on July 31. Investor concerns about the upcoming earnings report have led to a decline in stock price. 2. On July 16, MasTec's website published detailed information about its business areas, including transmission and distribution, wireless, fiber, and customer fulfillment activities. Despite the company's diversification, market doubts about its future profitability have further exacerbated the decline in stock price. 3. On July 16, MasTec announced it will release its second-quarter earnings report after market close on July 30 and hold a management webcast on July 31. Investor concerns about the upcoming earnings report have led to a decline in stock price. The market is showing concerns about the forthcoming earnings report **Stocks Ranked Among the Top by Market Capitalization** Ferrovial SE fell by 1.08%. Based on recent key news: 1. On July 15, Ferrovial announced that it will release its financial and operational results for the second quarter and first half of 2026 on July 28. This news has sparked market attention on the company's performance, leading to stock price fluctuations. 2. On July 15, Ferrovial appointed John L. Morton as CEO of the airport division, with the appointment effective September 2026. This personnel change may trigger market speculation about the company's future strategic direction, affecting the stock price. 3. No other significant news recently. 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