The S&P 500 climbed on Thursday to top 5,500 for the first time ever, as the artificial intelligence-driven rally in Nvidia showed no signs of slowing down.

The broad market index traded 0.2% higher, while the Nasdaq Composite advanced 0.3%. The Dow Jones Industrial Average dipped 46 points, or 0.1%.

Nvidia rose 1%, building on the previous session’s gains that cemented the chipmaker as the most valuable public company. Shares of the de facto market leader have climbed more than 180% this year as the AI boom continues to boost equities even as consumers show slowing signs of spending and some potential economic weakness.

Darden Restaurants rose 3% after topping earnings expectations, while Trump Media & Technology Group sank 10%, building on Tuesday’s loss.

Fresh economic data released Thursday contributed to some recent signs of a slowing economy. That data included higher-than-expected weekly jobless claims and poor housing starts and permits. A reading of the Philadelphia fed Manufacturing Index also came in below expectations.

Stocks are headed for a winning week after the S&P 500 reached a fresh record on Tuesday, alongside the Nasdaq Composite. The stock market was closed Wednesday for the Juneteenth holiday.

Excitement around AI has continued push the market higher in recent weeks. Some commentators have noted concern over a lack of market breadth outside the largest technology companies that could worsen, although the dour sentiment has yet to fully influence stocks that have continued to break records.

“[The AI theme] has a very 2000-2001’esque feel, but as we know the market can stay irrational longer than you can stay solvent,” said Thomas Fitzpatrick, managing director at R.J. O’Brien and Associates. “A day of reckoning will come but [it’s] hard to stand in the way of a speeding train.”