Stocks Rise as US Court Rules Trump Tariffs Are Unlawful

Stock markets rose on Thursday after a US court blocked most of the tariffs imposed by the administration of President Donald Trump.

On Wednesday, a three-judge panel at the Court of International Trade in New York said an emergency law invoked by the White House to launch protectionist policies on dozens of nations could not be used to bypass US Congress.

“The Worldwide and Retaliatory Tariff Orders exceed any authority granted to the President by [The International Emergency Economic Powers Act] to regulate importation by means of tariffs,” it said.

US markets were higher on Thursday, with the S&P 500 rising nearly 0.50% and the tech-heavy Nasdaq Composite gaining 1%. The Morningstar US Market Index was 0.50% higher. European markets initially gained but ended flat or slightly negative on the day.

As Morningstar’s senior US economist Preston Caldwell says, all product-specific tariff hikes still remain in place following the court’s decision, the largest of these being the 25% tariff hikes on autos, steel, and aluminum.

“Altogether, the average US tariff rate falls from about 18% to about 7% after the court’s decision. That’s still up significantly from the 2024 level of 2.4%, but is a much milder shock to the economy than the previous levels,” he says.

“However, we’re not out of the woods yet. The Trump administration could continue to rollout large tariff hikes on specific products.”

Nvidia Earnings Boost Sentiment

Shares in artificial intelligence giant Nvidia NVDA, deemed a bellwether for technology sentiment globally, rose more than 5% after earnings showed another strong rise in sales.

Morningstar analysts increased their fair value estimate for the company to $140 per share from $125, arguing that export controls were not slowing the company down.

Investors Still Expect More Market Volatility

The judgment may not dissolve the perceived threat of tariffs and the likelihood of more market volatility, especially with an appeal already launched by the White House.

“This does not necessarily mean tariffs are disappearing any time soon, as the federal appeals court is likely to take a more favorable view of them,” says Lale Akoner, global market analyst at trading platform eToro.

“What it does signal is the beginning of a lengthy legal battle, [and] one that could ultimately reach the Supreme Court, a development with significant market implications.”

Other commentators agree the ruling does little to assuage investors’ fears. For equities, this means continued uncertainty.

“The overnight news on the US trade court’s ruling does little to reduce uncertainty around the direction of the global economy, assuming that the Trump administration challenges the decision and looks for new routes to introduce tariffs on trade,” says Iain Barnes, chief executive at Netwealth.

“It’s increasingly clear that there is not going to be a steady end point on the structure, magnitude and breadth of tariffs and therefore overall trade policy, making it ever harder for [bosses] to plan long-term decisions on their supply chains and customer bases.

“This obviously calls into question whether the intended policy outcomes to readjust the US’s trading relationships can ever be achieved, but it also leaves the equity markets in limbo between solid current profit margins and a very uncertain outlook.”