Supreme Court Strikes Down IEEPA Policy, President Imposes 15% Duty in Defiant Response

A Constitutional Earthquake Reshapes Global Markets

When the United States Supreme Court delivered its 6-3 ruling on February 20, 2026, striking down the centerpiece of President Donald Trump’s tariff agenda, the initial reaction in financial markets was almost euphoric. Stocks jumped. The dollar surged briefly. Companies with heavy exposure to import levies — Amazon, Apple, retailers and appliance makers — immediately ranked among the day’s top performers. For a fleeting moment, it looked as though the era of trade war uncertainty might be drawing to a close.

That illusion evaporated within hours.

By the end of trading, the dollar had reversed course, finishing the day lower against major peers including the euro, the pound, and the yen. Gold and silver prices rallied — a signal, analysts noted, that investors don’t believe companies are entirely in the clear on tariff uncertainty yet. NBC News And when President Trump stormed out of the White House to denounce the justices as a “disgrace,” then announced sweeping new tariffs under an entirely different legal framework, the markets understood: the trade war had not ended. It had simply evolved.

The episode underscores one of 2026’s defining investment themes — that gold prices surge on trade uncertainty regardless of which direction events turn, while the dollar’s credibility faces a prolonged and structural test.

The Supreme Court Ruling: What It Said and What It Didn’t

In a long-awaited decision, Chief Justice John Roberts delivered the majority opinion concluding that the International Emergency Economic Powers Act of 1977 “does not authorize the President to impose tariffs.” The ruling was 6-3, with Justices Clarence Thomas, Samuel Alito, and Brett Kavanaugh dissenting. CNBC

The IEEPA had been the legal cornerstone of Trump’s so-called “Liberation Day” tariffs — the sweeping global levies announced in April 2025 that upended supply chains, rattled global equity markets, and generated enormous revenues for the U.S. Treasury. The federal government had been collecting approximately $30 billion in tariffs every month under the policy — roughly four times the pre-Trump baseline. NPR

The court’s majority leaned heavily on the “major questions doctrine,” the principle that Congress must explicitly authorize executive actions of vast economic significance. Roberts concluded that Trump’s approach “would represent a transformative expansion of the President’s authority over tariff policy” — language that drew immediate comparisons to the court’s earlier decision blocking President Biden’s student loan forgiveness program.

Yet crucially, the ruling left several important questions unresolved. The court declined to address “whether, and if so how, the Government should go about returning the billions of dollars that it has collected from importers” — an issue now likely headed to the U.S. Court of International Trade. NBC News For businesses that paid the IEEPA levies, the path to potential refunds remains uncertain and legally complex.

Trump’s Response: A 15% Global Tariff Under the Trade Act of 1974

President Trump wasted no time. Within hours of the ruling, he invoked Section 232 of the Trade Act of 1974 — a rarely used provision traditionally associated with national security justifications — to announce an initial 10% across-the-board tariff on nearly all U.S. trading partners. By the weekend, that figure had climbed to 15%.

Trump increased the rate of the new global tariff to 15%, vowing to work around the ruling that had invalidated his emergency tariffs. The Washington Post The move immediately raised fresh questions about the legal durability of this new approach, and whether it too would face constitutional challenge. Unlike IEEPA, the Trade Act of 1974 has a longer history of judicial deference — but legal experts caution that a 15% blanket global tariff of this magnitude would likely face scrutiny under the same major questions doctrine the court just applied.

Chris Krueger, managing director at TD Cowen Washington Research Group, had anticipated precisely this scenario, writing that given Trump’s public frustration with previous court rulings, “we would not be surprised to see a meaningful tariff escalation/response from the White House sooner rather than later.” CNBC

Market Reactions: Gold as the Safe-Haven Barometer

For investors watching the Trump tariffs’ impact on gold, the past week has been instructive. When clarity fails to materialize — and in this instance, a Supreme Court ruling produced not stability but a new round of legal improvisation — capital reliably flows toward precious metals.

Gold futures rose approximately 1% and silver gained 4% as investors poured into safe-haven assets following the tariff ruling and Trump’s defiant response. Yahoo Finance The moves reflect a broader dynamic: gold prices surge on trade uncertainty because the metal offers what fiat currency cannot — a store of value insulated from policy volatility and executive overreach.

The dollar’s behavior was equally telling. After an initial jump against major currencies on the day of the ruling, the greenback reversed course and ended lower — a pattern that speaks to deeper anxieties about U.S. economic governance. A stronger dollar is typically seen as a sign of investor confidence in U.S. assets and stability. NBC News Its retreat, even as legal uncertainty around tariffs appeared to lift, suggests that markets are pricing in something more structural: a prolonged period of executive-judicial conflict that will continue to cloud America’s trade relationships.

The U.S. dollar slide and its economic effects extend beyond currency traders. A weaker dollar raises import costs for American consumers, complicates Federal Reserve decision-making on interest rates, and erodes the purchasing power of dollar-denominated assets held by foreign central banks.

Global Trade Implications: Allies, Rivals, and the Refund Question

The international fallout from both the ruling and Trump’s 15% response has been swift and multifaceted.

Some countries have indicated they will honor the trade deals negotiated with the U.S. prior to the ruling, but experts believe the Supreme Court decision could provide meaningful leverage for major trading partners such as China, India, and the European Union. Yahoo Finance The EU Parliament’s trade chief moved quickly, proposing to freeze the bloc’s trade agreement with Washington amid what officials described as tariff “chaos.” ECB President Christine Lagarde warned that the latest tariff developments put agreed trade terms at serious risk.

Chinese markets, by contrast, responded with relative optimism. The Hang Seng index closed 2% higher on the following Monday, as investors weighed whether China’s leader Xi Jinping might seek to renegotiate terms of the existing U.S.-China trade deal from a position of renewed strength. Yahoo Finance

For businesses on the ground — importers, manufacturers, logistics operators — the picture remains murky. Small business coalition “We Pay the Tariffs” called for a “full, fast, and automatic” refund process, with executive director Dan Anthony warning that “small businesses cannot afford to wait months or years while bureaucratic delays play out.” NBC News President Trump, for his part, declined to commit to honoring refund obligations, suggesting the matter would need to be litigated — a prospect that could drag through the courts for years.

Inflation, the Fed, and the Long-Term Economic Outlook

The Supreme Court ruling arrived on the same day the Commerce Department reported that core inflation ran at a 3% annual rate in December, as measured by the Fed’s preferred PCE gauge. The timing is no coincidence in its significance: with inflation still running above the Federal Reserve’s 2% target, any new round of tariff-driven cost pressures — even under a different legal framework — complicates the central bank’s path toward rate normalization.

Jason Pride, chief of investment strategy and research at Glenmede, argued that “fiscal conditions already point to a sizable positive impulse in 2026,” driven by the One Big Beautiful Bill Act and an easing monetary policy backdrop, and that the tariff ruling might incrementally enhance this stimulus. CNBC But he cautioned that a temporary drag on exports could emerge if companies front-run the new tariff regime by accelerating imports — a pattern observed earlier in 2025.

For emerging markets, the risks are asymmetric. A weaker dollar provides temporary relief on dollar-denominated debt servicing, but a renewed global trade war, with its attendant supply chain disruptions and demand uncertainty, would hit export-dependent developing economies disproportionately hard.

What Comes Next: Legal Uncertainty as the New Normal

The Supreme Court’s ruling does not, in the words of Justice Kavanaugh’s concurrence, “greatly restrict Presidential tariff authority going forward” outside the IEEPA context. That means the 15% Trade Act tariffs — and further escalations — are not without legal foundation. Whether they survive judicial scrutiny at their current scale and scope is a question that will likely take months, if not years, to resolve.

What is clear is that the era of global trade war risks in 2026 has not passed. It has simply entered a new phase — one defined not by a single contested law, but by an ongoing struggle between executive ambition, congressional authority, and judicial oversight. For investors, that means continued demand for safe-haven assets, ongoing volatility in currency markets, and heightened sensitivity to any fresh policy signal from Washington.

Gold, which has demonstrated its enduring role as a crisis barometer throughout this episode, appears well-positioned to maintain its elevation so long as that uncertainty persists. The dollar, caught between two competing narratives — the rule-of-law reassurance of a functioning judiciary and the policy instability of an administration determined to circumvent it — faces a more complicated road ahead.

In the end, markets are not just pricing a tariff rate. They are pricing a system’s resilience.