Stock Market Summary – September 15, 2025

Early demand for the iPhone 17 has led to positive projections for Apple. Global lead times for the new model have averaged better than the previous iPhone 16 model. These increased demands pushed Apple’s shares higher by 15% quarter-to-date. A significant boost for Apple was the success of the iPhone 17 base in China due to its lower cost. Despite a 5.7% year-to-date decline, analysts from JPMorgan and Bank of America maintain a positive outlook on the stock.

CoreWeave’s shares rose nearly 8% upon the announcement of a $6.3 billion agreement with Nvidia. CoreWeave, a provider of cloud infrastructure for AI workloads, plans to submit the full contract alongside its third-quarter financial results. Although CoreWeave continues to lose money, it remains reliant on Nvidia, and its shares have tripled since its IPO.

Unrelated, today flight company Alaska Air shares fell more than 5% after it announced lower projected earnings per share for the third quarter.

In the tech sector, Tesla CEO Elon Musk’s purchase of $1 billion in shares resulted in a stock increase of 6%. Additionally, the Winklevoss’ exchange, Gemini Space Station, added 1% following its debut on the Nasdaq.

RBC Capital Markets increased its year-end forecast for the S&P 500 from 6250 to 6350 due to stronger-than-expected corporate profits. However, it predicts ‘choppy’ action, as the market has struggled to break through its previous peaks.

Elon Musk has acquired over 2.5 million Tesla shares worth approximately $1 billion. This has led to a 6% increase in Tesla shares during premarket trading. Musk’s investment has produced significant excitement among investors and created positive speculation around the firm’s stock.

Oracle experienced its most significant weekly gain since 1999, with shares increasing by over 25% due to anticipated spending from OpenAI. This development reflects the growing trend in the tech industry, where companies with ties to OpenAI, including Oracle, Broadcom, Microsoft, and Nvidia, have experienced significant growth of their market caps, totaling $4.5 trillion since 2022.

However, Nvidia’s shares fell by about 2% following an announcement by China’s market regulator. The regulator has initiated a preliminary investigation alleging that Nvidia violated China’s anti-monopoly law during its acquisition of Mellanox.

Swiss watchmaker Swatch has revealed a unique response to President Trump’s imposing a 39% tariff on Switzerland. The manufacturer has released a special edition watch known as the “WHAT IF…TARIFFS?” model. If the U.S. decides to adjust its tariff policy, Swatch has stated that it will then cease selling the watch.

On the other hand, UnitedHealth Group’s shares have quickly risen by almost 30% after Berkshire Hathaway revealed it had taken a stake in the insurer.

Investors are also expecting an interest rate cut from the Federal Reserve this week. This key policy decision is much anticipated in the market, and traders expect Chair Jerome Powell to provide essential guidance on future rates.

In other news, Maurene Comey, a federal prosecutor involved in lawsuits against Jeffrey Epstein and Ghislaine Maxwell, is suing the Department of Justice for wrongful termination during the Trump administration.

Overall, the stock market shows signs of positivity, particularly regarding OpenAI’s impact on the tech industry and Elon Musk’s hefty purchase of Tesla shares.