尾盘突发！这只中概股，暴涨超60%

Core Viewpoint - The article discusses the performance of major U.S. stock indices in 2025, highlighting the impact of artificial intelligence on market trends and the recent volatility in stock prices, particularly focusing on the significant rise of a specific company, 联代科技 (Liandai Technology) [2][4][13]. Market Performance Summary - In 2025, the S&P 500 index recorded a 16.39% increase, marking its third consecutive year of double-digit annual gains, despite a recent decline [4]. - The Nasdaq Composite index benefited from the AI boom, achieving a cumulative increase of 20.36% in 2025 [4]. - The Dow Jones Industrial Average rose by 12.97% in 2025, indicating a significant rebound after a sharp decline following tariff announcements by President Trump in April 2025 [4]. AI Influence on Market - Over the past three years, AI has been a decisive force driving market performance, with the S&P 500 soaring by 24% in 2023 and 23% in 2024 [5]. - In 2025, the narrative around AI diversified, with performance spreading to other sectors, and the so-called "Magnificent Seven" stocks showing varied results [5]. - Alphabet, Google's parent company, emerged as a major winner with a year-to-date increase of over 65%, while Amazon lagged with only about a 6% rise [5]. Employment Data Insights - Recent employment data showed that initial jobless claims in the U.S. fell to 199,000, the lowest since November 29, 2025, indicating a stable job market despite concerns about economic softness [6][7]. - The trend of decreasing jobless claims reflects a "few hires, few layoffs" employment environment, with claims dropping from 237,000 in early December 2025 [6]. Company-Specific Highlights - 联代科技 (Liandai Technology) experienced a dramatic surge in stock price, rising by 61.09% at the close and continuing to increase by nearly 12% in after-hours trading [13]. - The company, founded in June 2008 and listed on NASDAQ in 2021, focuses on customized product services for brand owners and telecom operators, with a recent emphasis on medical wearable devices [13].