财联社·2025-09-30 00:09Core Viewpoint - The US stock market showed collective gains on September 29, with the Dow Jones, S&P 500, and Nasdaq indices rising, despite previous week weaknesses attributed to concerns over AI-related investments and potential tariffs on foreign films [1][2]. Market Performance - The Dow Jones index closed at 46,316.07, up 0.15% (+68.78 points) - The S&P 500 index closed at 6,661.21, up 0.26% (+17.51 points) - The Nasdaq composite index closed at 22,591.15, up 0.48% (+107.09 points) - The previous week saw the S&P 500 index experience its worst weekly performance since August 1, while the Nasdaq had its weakest week since early August [1][2]. AI and Market Sentiment - Concerns regarding the sustainability of AI infrastructure collaborations between Nvidia and OpenAI have put pressure on the market - Barclays' US equity strategy head, Venu Krishna, noted that capital expenditures in the AI sector continue to drive market momentum, with no signs of slowing down - Other sectors are expected to benefit from the AI infrastructure spending wave, particularly given the high weighting of the technology sector in the S&P 500 [2]. Tariff Implications - Hargreaves Lansdown's chief investment strategist, Emma Wall, highlighted that the impact of tariffs on inflation has not yet been fully reflected in data, and further tax increases could heighten price pressures - Trump's proposal to impose 100% tariffs on films produced outside the US has raised concerns among investors [3][4]. Federal Government Shutdown Concerns - The potential for a federal government shutdown is causing market anxiety, particularly regarding delays in key economic data releases that could obscure the Federal Reserve's interest rate outlook - Historical data suggests that government shutdowns have minimal direct impact on markets, but uncertainty surrounding economic indicators could dampen market sentiment [4]. Technology Sector Performance - Major tech stocks showed mixed results, with Nvidia up 2.07%, Microsoft up 0.61%, while Apple fell 0.4% and Google down 1.14% - The Philadelphia Semiconductor Index reached a historical high during the day but closed up only 0.16% - Micron Technology rose 4.22% due to reports of shortages in the DRAM and NAND flash memory markets, with expectations of price increases in the upcoming quarters [5][6]. Notable Stock Movements - Seagate Technology rose 5.35% and Western Digital increased by 9.23%, following a significant price target upgrade from Morgan Stanley, citing a recent demand turnaround - The copper and metals sector saw strong performance, with Hudbay Minerals up 7.42% and Ero Copper up 7.14% - Electronic Arts (EA) rose 4.5% after announcing a final acquisition agreement valuing the company at $55 billion [7]. Chinese Stocks Performance - The Nasdaq Golden Dragon China Index increased by 2.03%, with notable gains in several Chinese stocks, including Xiaoma Zhixing up 7.32% and Alibaba up 4.65% [8].