The major U.S. stock indexes hit record highs for the third consecutive day, driven by tech gains. Nvidia announced a $100 billion investment in OpenAI, boosting shares by 3.9%. Apple rose 4.3% on strong iPhone demand, while Tesla climbed 1.9%. The S&P 500 technology sector led gains, closing up 1.7%.

Federal Reserve officials expressed doubts about further rate cuts, despite last week’s quarter-point decrease. St. Louis Fed President and Atlanta Fed President acknowledged the need to manage unemployment risks, but prioritized lowering inflation. Fed Governor Stephen Miran believed monetary policy was already restrictive.

The S&P 500 is up 13.8% for the year and 3.6% for September, historically a weak month for stocks. Concerns over market valuations and potential headwinds persist, with some investors wary of President Trump’s new visa fees for foreign workers. Kenvue shares fell due to autism concerns, bouncing back after FDA advice on acetaminophen use.

Key economic reports this week include the U.S. personal consumption expenditures price index, a key inflation gauge. Market ratios on NYSE and Nasdaq show more advancing issues than decliners. U.S. exchange volume reached 18.65 billion shares, above the 17.5 billion average over the past 20 days.

Read more at Yahoo Finance: Wall St indexes post record closing highs again, with Nvidia, tech shares higher