Stock Market Summary – September 29, 2025

The S&P 500 climbed 0.3% while the Nasdaq Composite advanced 0.5% and the Dow Jones Industrial Average rose by 76 points (0.2%) as AI stocks such as Nvidia, Advanced Micro Devices, and Micron Technology rallied, with Nvidia achieving a 2% increase. Electronic Arts’ shares also rose by 4% following its announcement that it would privatize in a $55 billion deal. Notwithstanding, the threat of a government shutdown has increased to a 70% probability according to prediction markets, a consequence of escalating disputes over spending.

Despite market volatility, the S&P 500 rose 3% this month, the Dow by 1%, and Nasdaq surged ahead with a 5% rally. However, the possibility of a government shutdown and ensuing cuts in federal employment has serious implications for economic data released by the Labor Department and, in turn, interest rate decisions by the Federal Reserve.

In other news, OpenAI’s announcement of its Instant Checkout feature for Etsy led to a near 16% increase in Etsy’s shares while Shopify’s shares rose by over 6%. By contrast, Wells Fargo fell by 1% following a downgrade from Morgan Stanley. Despite this setback, the bank’s shares remain 20% higher year-to-date, outperforming the S&P 500’s 13% advance. Wells Fargo’s CFO Michael Santomassimo has predicted that credit cards will become a significant contributor to Wells Fargo’s bottom line in the coming years.

In sum, the signals are decidedly mixed with the potential for a government shutdown looming large, while advances in technology have delivered a trading boost to AI stocks and e-commerce entities.

AI company Anthropic launched Claude Sonnet 4.5, its latest artificial intelligence model, which excels in specialized industries including finance. The model is better at coding and processing complex tasks over extended periods. Anthropic, valued at $183 billion, anticipates further improvements and releases before year end. OpenAI, however, the company’s direct competition, has a valuation of $500 billion, after the launch of model GPT-5.

In other market news, legacy tech firms like Cisco, IBM, and Dell are staging a comeback, playing significant roles in the AI datacenter buildout and becoming relevant again to growth investors. Over the past year, IBM, CSCO, HPE and Dell shares are up by 29%, 28%, 27% and 12% respectively.

Oil prices fell by around 3% after Iraq’s Kurdistan region resumed oil exports and OPEC+ announced plans for another oil output hike in November. Brent crude futures fell to $67.97 a barrel, a decrease of 3.08%, while U.S. West Texas Intermediate crude ended at $63.45 a barrel, down by 3.45%.

Volatility may extend to government bond markets as the risk of a U.S. government shutdown looms. Past shutdowns have typically had little impact on markets, but the fragile state of U.S. creditworthiness may pressure rating agencies to reassess their ratings, potentially causing increases in Treasury yields and a hit to stocks.

The U.S. Labor Department stated that a government shutdown would lead to a halt in crucial economic data releases, including the monthly nonfarm payrolls report and other key indicators that inform Federal Reserve policy decisions.