After nearly a year of uncertainty surrounding U.S. trade policy, the Supreme Court ruled that certain recent tariffs were unconstitutional, significantly altering the policy landscape. As is often the case in Washington, policy developments continue to evolve. The administration has indicated it may pursue alternative legal authorities to implement tariffs, and markets are assessing what these changes could mean for trade policy, corporate earnings, consumer spending, and investment portfolios.
For investors, the key takeaway is not the legal ruling itself, but how markets behaved during the period of uncertainty. While markets may experience volatility during policy transitions, they have historically responded to a wide range of economic and political developments over time. Tariffs are likely to remain part of the policy discussion, making it helpful to review the major developments of the past year in context.
A year of tariff-related market volatility
To understand the implications of the Court’s decision, it is helpful to consider the legal authorities available to presidents when imposing tariffs. Different statutes provide varying levels of flexibility, duration, and scope.
The tariffs announced on “Liberation Day” in April 2025 were based on the International Emergency Economic Powers Act (IEEPA), a 1977 law that grants the president authority to regulate certain economic transactions following a declared national emergency.
Key developments included:
April 2, 2025: A baseline 10% tariff was announced on most trading partners, along with additional country-specific tariffs. Financial markets declined following the announcement, reflecting concerns about economic growth and inflation.
April 9, 2025: A 90-day pause was announced on the higher country-specific tariffs, while the baseline tariff remained in place. Markets rebounded in the weeks that followed.
February 20, 2026: The Supreme Court ruled that the administration did not have authority under IEEPA to impose broad global tariffs, reaffirming Congress’s central role in trade policy.
Market reactions during this period illustrate how policy announcements can influence short-term sentiment and asset prices. However, short-term market movements do not necessarily indicate long-term trends.
Ongoing policy uncertainty
Following the Court’s decision, the administration moved to implement tariffs under Section 122 of the Trade Act of 1974, which permits temporary tariffs under specific conditions and limitations.
Section 122 allows tariffs of up to 15% for up to 150 days without prior congressional approval. The statute was designed to address balance-of-payments concerns and other economic pressures.
As a result, while certain tariff measures may be modified or reversed, trade policy uncertainty may persist. Businesses and investors should be prepared for potential changes in tariff levels, negotiations with trading partners, and possible legal or legislative developments.
There are also outstanding questions regarding potential refunds for tariffs previously collected under IEEPA. Court proceedings may determine whether reimbursements are appropriate and who may be eligible. The timing and scope of any such decisions remain uncertain.
Economic outcomes may differ from expectations
Economic forecasts often reflect a range of possible outcomes. When tariffs were initially increased to levels not seen in decades, some analysts projected slower growth, higher inflation, and market stress.
Several factors may have influenced subsequent economic results:
Tariff levels changed multiple times during the year.
Some businesses adjusted supply chains or inventory levels in anticipation of policy changes.
Broader economic fundamentals, including employment trends, consumer spending, and corporate earnings, continued to play a significant role in overall economic performance.
According to publicly available data, inflation moderated during parts of 2025 and early 2026, and economic growth remained positive. However, past economic performance does not guarantee future results. Tariffs may still have longer-term effects on supply chains, pricing, corporate margins, and global trade flows.
Investment considerations
Periods of policy uncertainty can lead to increased market volatility. Investors may benefit from maintaining diversified portfolios aligned with their long-term goals, risk tolerance, and time horizon. Attempting to predict short-term market movements based on policy developments can involve significant risk.
Historically, markets have experienced intra-year declines while still delivering positive full-year returns in some periods. However, past performance does not guarantee future results, and all investments involve risk, including the possible loss of principal.
The bottom line
Trade policy and legal developments can influence markets in the short term, but long-term investment outcomes are typically driven by broader economic fundamentals, corporate performance, diversification, and disciplined investment strategies.
Investors should consider consulting with a qualified financial professional before making changes to their portfolios based on policy developments.
Important Disclosures:
This material is provided for informational purposes only and should not be construed as investment, legal, or tax advice. Opinions expressed are subject to change without notice. Investing involves risk, including the potential loss of principal. Past performance does not guarantee future results.