Stocks slide as Powell warns of impact of tariffs on the economy

Stocks slide as Powell warns of impact of tariffs on the economy

US stocks fell Wednesday as Federal Reserve Chair Jerome Powell warned that President Donald Trump’s tariffs are unprecedented in modern history, with effects that “remain highly uncertain.”

The Dow tumbled 700 points, or 1.73%. The broader S&P 500 fell 2.24%. The tech-heavy Nasdaq Composite tumbled 3.07%.

“The level of the tariff increases announced so far is significantly larger than anticipated,” Powell said at an event in Chicago. “The same is likely to be true of the economic effects, which will include higher inflation and slower growth.”

Wall Street has been mired in uncertainty as investors wrestle with the Trump administration’s back-and-forth on trade policy.

Powell’s comments echo concerns that emerged in recent weeks as consumers and businesses grapple with Trump’s tariffs. Spending at US retailers surged in March at the strongest monthly pace in more than two years, according to Commerce Department data , as Americans rushed to beat Trump’s massive tariff hikes.

Nvidia ( NVDA ) slumped 6.87% on Wednesday after the chipmaker said it would take a $5.5 billion hit because the US government placed new restrictions on the export of its artificial intelligence chips to China.

The export restriction on Nvidia is another step in the growing contest between the US and China for dominance in AI. That battle has heated up since January, when upstart DeepSeek caught Silicon Valley by surprise with its lower cost, ChatGPT-like AI model that has spurred an AI boom in China.

“While we expect that trade talks will ultimately yield progress, the brinkmanship between the US and China looks set to continue in the near term,” said Solita Marcelli, chief investment officer for the Americas at UBS Global Wealth Management, in a note Wednesday.

Stocks are coming off slight losses on Tuesday. Investors are on alert for updates from the White House that might signal developments in trade policy. The Trump administration on Monday kicked off investigations into imports of pharmaceuticals and semiconductor chips (a precursor to potential tariffs), according to notices posted to the Federal Register.

Trump said on Sunday he would be announcing a tariff rate on imported semiconductors over the next week, adding that there would be flexibility with some companies in the sector.

The S&P 500 on Monday had posted its first back-to-back gain in two weeks after the Trump administration announced exemptions on tariffs on electronics imported from China, in addition to Trump saying he is considering exemptions on tariffs on automakers. Despite the brief rally, the S&P 500 was down Tuesday and Wednesday and is still trading below its closing price on April 2, just before Trump initially laid out his “reciprocal” tariffs.

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