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LIVE MARKETS-Supreme Court tariff case may bring market volatility

ReutersNov 3, 2025 6:35 PM
  • US equity indexes mixed, Nasdaq up 0.7%, Dow dips
  • Cons disc leads S&P 500 sector gains, materials weakest
  • STOXX 600 up 0.1%
  • Dollar dips: gold, crude gain; bitcoin down >2%
  • US 10-Year Treasury yield climbs to 4.11%

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SUPREME COURT TARIFF CASE MAY BRING MARKET VOLATILITY

The Supreme Court on Wednesday will begin hearing arguments on whether U.S. President Donald Trump’s tariff policies are legal, and any indication that they could be struck down could increase market volatility.

Although a decision will not come immediately, traders will focus on questions from the Supreme Court justices to gauge their thoughts.

“Often observers use the tone of the questions to infer the ultimate direction of the outcome. It’s not perfect but seems to work often enough,” Steve Englander, head, global G10 FX research and North America macro strategy Standard Chartered Bank NY Branch, said in a report.

“In any event the speed with which oral arguments were scheduled raises the risk that we get a final decision in late November or early December,” he added.

The Supreme Court decision will hinge on whether Trump overstepped his authority in imposing most of his tariffs under a 1977 law known as the International Emergency Economic Powers Act. The tariffs were challenged by various businesses and 12 U.S. states.

Trump has said tariff revenues will help to reduce the deficit.

“The market serenity likely reflects a view that the Supreme Court will tinker around the edges but not make wholesale changes that affect tariff collection,” Englander said.

“Asset markets could reprice fiscal risk if it looks like tariffs will be struck down and if there is uncertainty on whether the alternatives are effective in stabilizing future deficits. Uncertainty over damages or refunds add could add volatility.”

(Karen Brettell)

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