U.S. stock market closed with mixed results: Cisco's stock rose as its financial forecast was revised upward, while UnitedHealth's stock plunged due to a judicial investigation.

On May 15, 2025, the U.S. stock market closed with mixed performance. The Dow Jones Industrial Average rose over 270 points due to Cisco's upward revision of its full-year forecast, while the S&P 500 Index increased for the fourth consecutive day. The Nasdaq Index edged down due to declines in tech stocks such as Amazon and Meta. Cisco's stock price jumped more than 5% on strong AI demand, while UnitedHealth tumbled 11% after reports of a criminal investigation by the U.S. Department of Justice, hitting a five-year low, making it the market's focal point.
Key Updates
05/15 21:23
U.S. stock market closed with mixed results: Cisco's stock rose as its financial forecast was revised upward, while UnitedHealth's stock plunged due to a judicial investigation.
On May 15, 2025, the U.S. stock market closed with mixed performance. The Dow Jones Industrial Average rose over 270 points due to Cisco's upward revision of its full-year forecast, while the S&P 500 Index increased for the fourth consecutive day. The Nasdaq Index edged down due to declines in tech stocks such as Amazon and Meta. Cisco's stock price jumped more than 5% on strong AI demand, while UnitedHealth tumbled 11% after reports of a criminal investigation by the U.S. Department of Justice, hitting a five-year low, making it the market's focal point.
Cisco Raises Financial Forecast, Stock Soars Intraday
Networking equipment giant Cisco (NASDAQ: CSCO) announced its fiscal 2025 third-quarter earnings after the market closed on Wednesday, with revenue reaching $14.1 billion, an 11% year-over-year increase, meeting market expectations. Adjusted earnings per share were $0.96, better than analysts' estimate of $0.92. The company also projected revenue for the current quarter ending in July to be between $14.5 billion and $14.7 billion and raised its full-year revenue forecast to $56.5 billion to $56.7 billion, higher than the previous estimate of $56 billion to $56.5 billion.
Cisco noted strong demand for AI infrastructure, with AI orders from large cloud customers exceeding $600 million last quarter alone, and surpassing $1 billion since the beginning of 2025. CEO Chuck Robbins stated that AI-driven transformation is crucial for businesses, and customer spending has not shown a significant slowdown.
Additionally, Cisco announced a partnership with Saudi Arabian AI company Humain to provide network products, computing power, and cybersecurity services. Robbins revealed that Humain's total investment in the AI field could reach hundreds of billions of dollars, potentially rivaling major U.S. network operators.
Encouraged by the positive news, Cisco's stock rose over 5% intraday on Thursday, closing at $62.92, up about 9.1% year-to-date, with a 29.9% increase over the past 12 months.
UnitedHealth Faces Criminal Probe, Stock Plummets
In stark contrast to Cisco, UnitedHealth Group (NYSE: UNH) saw its stock plummet 11% on Thursday, reaching a five-year low. According to The Wall Street Journal, the U.S. Department of Justice is conducting a criminal probe into the company, involving potential Medicare fraud. The investigation reportedly began last summer.
This news continues UnitedHealth's recent stock decline. Since mid-April, the company's stock has fallen over 50%. Previously, UnitedHealth had revised its full-year profit forecast downward and withdrew its financial guidance earlier this week, while also announcing the sudden departure of its CEO, raising concerns about its operational stability.
UnitedHealth stated it has not yet received formal notification from the Department of Justice, but the market reacted strongly, and the stock's plunge also pressured the Dow Jones Industrial Average. As a component of the Dow, UnitedHealth was once one of the most influential stocks in the index, but its market value and weight have significantly declined.
Divergent Performance of Major Indices
On Thursday, the three major U.S. stock indices had mixed results. The Dow Jones Industrial Average rose 271.69 points, or 0.65%, to close at 42,322.75 points, mainly boosted by Cisco's rise. The S&P 500 Index increased by 24.35 points, or 0.41%, closing at 5,916.93 points, marking the fourth consecutive day of gains. The Nasdaq Composite Index fell 34.49 points, or 0.18%, to close at 19,112.32 points, weighed down by tech stocks like Amazon and Meta.
Among the 11 sectors of the S&P 500, 8 closed higher, with utilities rising 2.1% and consumer goods up 2%. Technology and healthcare sectors performed relatively weakly.
Economic Data and Market Sentiment
Economic data released on Thursday showed that the U.S. Producer Price Index (PPI) unexpectedly fell by 0.5% in April, the largest drop in five years, indicating that businesses may be absorbing some tariff costs. In terms of retail sales, they rose to $724.1 billion in April, but sales excluding autos increased by only 0.1%, below expectations.
Additionally, initial jobless claims remained at 229,000, slightly above market estimates, suggesting resilience in the labor market. The yield on the 10-year U.S. Treasury note fell from 4.53% the previous day to 4.44%, reflecting cautious market sentiment about the economic outlook.
In terms of market sentiment, with the U.S. and China reaching a 90-day tariff suspension agreement, investor concerns about trade tensions have slightly eased. The Chicago Board Options Exchange Volatility Index (VIX) fell below 20 earlier this week, indicating a rise in market risk appetite.
Other Key Stocks
- Walmart (WMT) shares fell 0.5%, despite first-quarter profits exceeding expectations, as revenue missed targets and the company warned of price increases due to tariff pressures.
- Amazon (AMZN) dropped 2.4%, weakening alongside tech stocks like Meta and Tesla, weighing down the Nasdaq index.
- Alibaba (BABA) fell 7% due to earnings falling short of expectations, reflecting weak consumer spending in China and increased competition.
- NetEase (NTES) and Gaotu (GOTU) rose 13% and 17%, respectively, due to better-than-expected earnings.
References
- 思科調高全年財測 AI熱潮帶動網通需求 盤後股價勁揚2% | 世界新聞網
- United States Stock Market Index - Quote - Chart - Historical Data - News
- Cisco (CSCO) Jumps on Strong Q3 Results, Higher Guidance; AI Orders Top $600M
- UnitedHealth Stock Headed for Worst Month Ever as Troubles Mount
- Wall Street drifts back within 4% of its record after the S&P 500 notches a 4th straight gain
- Cisco Stock Jumps After Upgrade, Price Hikes From Wall Street On Q3 Earnings Beat – Retail Mood Exuberant
People Also Ask...

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