Stock market today: Dow, S&P 500, Nasdaq turn higher as Nvidia surges on OpenAI deal

Group 1: Market Performance - US stocks experienced a positive turn, with the Dow Jones Industrial Average increasing by 0.1%, the S&P 500 rising by approximately 0.4%, and the Nasdaq Composite leading with a 0.6% gain, driven by strong performance from Big Tech companies [1] - Gold prices reached a new all-time high, surpassing $3,750, amid expectations that the Federal Reserve will lower interest rates twice more before the end of 2025 [3] Group 2: Company Developments - Nvidia's stock surged as the company announced plans to invest up to $100 billion in OpenAI over the coming years, bringing its stock price close to an all-time high [2] - Oracle shares also saw a significant increase following the news that it would be part of a consortium controlling TikTok's US operations [2] - Tesla was on track to close at a 2025 high as investors anticipated advancements in the company's self-driving technology and new product launches [2] Group 3: Federal Reserve Insights - Markets are awaiting the upcoming reading of the Personal Consumption Expenditures price index, which is the Fed's preferred inflation gauge, with expectations that a weak report could increase the likelihood of another quarter-point rate cut in October [4] - Investors are also looking for insights from a series of Fed speakers, including Chair Jerome Powell, with discussions around the need for interest rates to be approximately 2 percentage points lower [5] Group 4: Regulatory Environment - The recent announcement of a $100,000 fee for H1-B work visas by the Trump administration has raised concerns among major companies like Microsoft and Goldman Sachs, prompting them to issue urgent communications to employees [6]