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Analysis-Why the US exceptionalism trade is faltering
FILE PHOTO: A trader works on the floor of the New York Stock Exchange shortly before the closing bell as the market takes a significant dip in New York · Reuters

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By Lewis Krauskopf and Laura Matthews

NEW YORK (Reuters) - Going into the year investors were betting that President Donald Trump's policies would spur U.S. stocks and the dollar to outperform their global peers. That assumption is increasingly getting tested.

The Trump administration's revamp of the government and massive moves on trade and other policies have instead injected uncertainty, with consumers and businesses worrying about the economy, threatening the narrative of U.S. exceptionalism.

The policy uncertainty is "leading to a dynamic ... where you start to see investors and business leaders and consumers alike kind of reining things in a little bit," said Garrett Melson, portfolio strategist at Natixis Investment Managers.

"That's against the backdrop that, aside from all the policy and the Trump administration noise, was already on a cooling trajectory" for the U.S. economy, he added.

In addition, the country's megacap tech and growth companies that drove much of the market's gains in recent years have faltered on valuation concerns and fed by worries over the DeepSeek low-cost Chinese artificial intelligence model. One ETF tracking the so-called "Magnificent Seven" group has fallen more than 10% from its high in mid-December.

Nvidia, a critical member of the "Magnificent Seven" group, forecast first-quarter revenue above estimates on Wednesday, while the semiconductor company's margin outlook was slightly lower than expected, in a report that was primed to set the tone for markets on Thursday.

Heading into 2025, U.S. equities and the dollar were widely expected to outstrip their foreign counterparts. So far this year, however, the U.S. benchmark S&P 500 has risen just over 1% against a roughly 7% climb for an MSCI index of stocks in over 40 other countries, while the greenback has slid about 3% from its January peak against a basket of its main rivals.

Some of the diverging performance stems from developments outside the U.S., including surprising economic data in Europe and the emergence of an AI model in China that has shaken the technology sector, which has an outsized presence in U.S. stock indexes.

However, worries about the domestic growth outlook have heightened after recent weak indicators from consumers and businesses, amid a barrage of announcements regarding trade and federal workforce cuts from the Trump administration, compounding concerns about the impact of still-firm inflation on the Federal Reserve's interest rate path.