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The global economy may be heading into a stormy stretch, the Organization for Economic Cooperation and Development warned Tuesday, cautioning that U.S. tariffs, countertariffs and widening trade barriers could undermine fragile GDP growth by 2026. The group’s assessment paints a picture of an economy whose foundations are beginning to tremble under the weight of escalating trade conflict.

The OECD said rising trade restrictions between the U.S. and dozens of countries could “inflict significant damage” on global output and supply chains—an economic shockwave with the potential to unwind years of incremental progress.

“This outlook remains fragile,” the report declared, sounding an alarm about potentially turbulent years ahead.

A Surprising 2025 Resilience Gives Way to a 2026 Slowdown

Despite the report’s stark warnings, global GDP growth in 2025 was labeled “surprisingly robust”—a resilience the OECD attributed to companies rushing to move goods and accelerate production before higher tariffs take hold, a phenomenon economists call frontloading.

But the momentum appears short-lived.

According to the OECD:

• GDP growth slowed from 3.3% in 2024 to 3.2% in 2025

• It is projected to fall further to 2.9% in 2026

• A “small rebound” may lift global growth to 3.1% in 2027

The Paris-based organization also pointed to a sharp long-term structural decline among its own member states, noting that potential GDP per-capita growth now sits at 1.4%, compared with 2.2% in the late 1990s.

U.S. Tariffs Front and Center — and Now Facing Legal Heat

Trump Administration Battles Suits Over Trade Strategy

The economic forecast comes just weeks after the OECD projected that U.S. growth would slow from 1.8% in 2025 to 1.5% in 2026, driven largely by tariffs imposed by President Donald Trump under the International Emergency Economic Powers Act.

Those same tariffs have sparked multiple lawsuits, adding a legal dimension to the trade tensions. Earlier this month, the U.S. government told the Supreme Court that the IEEPA grants the president broad authority to regulate imports—including using tariffs as leverage in international disputes.

The combination of legal uncertainty, trade retaliation and ongoing geopolitical rigidity has created what analysts describe as an economic “pressure chamber,” building toward what could be a decisive year for the global economy.