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Tariff Authority Overturned: What The Supreme Court Decision Means For U.S. E-Commerce

Landmark Ruling Overturns Tariff Legacy

The U.S. Supreme Court ruled 6–3 that the International Economic Powers Act does not give the president authority to impose tariffs, challenging a key element of former President Donald Trump’s trade policy. The decision raises questions about the legal basis for several tariffs introduced in recent years.

Stock Markets Rally As E-Commerce Giants Benefit

This legal setback sent ripples through the e-commerce sector, with major companies responding swiftly. Shares of Amazon and Wayfair advanced approximately 2%, while Etsy surged 8%. Other key players, such as Shopify and eBay, also posted gains of 1% and 3% respectively. Pinduoduo Holdings, the parent company behind the ultra-low-cost online marketplace Temu, saw its shares rise 2%.

Implications For Supply Chains And Consumer Pricing

Tariffs introduced during the Trump administration added pressure on e-commerce companies by increasing costs and complicating supply chains. Many platforms adjusted pricing models, restructured logistics operations, and reduced staffing in response. The removal of the “de minimis” exemption, which previously allowed low-value packages to enter the U.S. duty-free, further increased costs for smaller businesses.

Strategic Shifts In Response To Regulatory Change

The legal decision comes as companies such as Temu and Shein continue adjusting their U.S. strategies. These retailers previously relied on direct shipments from China to avoid additional costs. Facing regulatory changes, Temu temporarily paused direct shipping from China and expanded domestic seller networks and logistics operations.

Market Reactions And Consumer Trends

Beyond stock gains, the ruling may influence pricing and consumer behavior. Companies could seek refunds tied to past tariff payments, potentially involving billions of dollars. Amazon CEO Andy Jassy has previously noted gradual price increases and a shift toward lower-cost purchases among consumers. Etsy has also warned about softer discretionary spending and changing buyer behavior, trends that may affect marketplace strategies.

Industry Perspectives And Future Outlook

The reaction from trade organizations has been uniformly positive. The National Retail Federation said the ruling provides greater clarity for businesses managing international supply chains. Several companies have already launched legal efforts to recover tariff-related costs, highlighting the longer-term financial implications of the ruling.

The court’s decision is expected to reshape how e-commerce companies approach sourcing, pricing, and logistics in the U.S. market. As businesses adjust to the new legal framework, the impact on competition and consumer pricing will continue to unfold.

Copyright Law Struggles To Keep Up With AI Training

Courts Are Still Applying Old Copyright Rules To AI

AI companies train models on enormous amounts of published material, including books, articles and academic research. Whether using that content without authors’ permission violates copyright law remains unresolved.

Much of the debate centres on fair use, which allows copyrighted material to be used without permission in certain circumstances. Courts consider factors such as the purpose of the use, how much material was involved and its impact on the original market.

Anthropic Case Sets An Important Precedent

A major case involving Anthropic and a group of authors provided one of the clearest rulings so far. Judge William Alsup found that using copyrighted books to train AI models was lawful, comparing the process to people reading and studying literature before creating something new.

Anthropic was nevertheless ordered to pay $1.5 billion in a settlement. The penalty concerned books the company had obtained from illegal online libraries rather than the AI training itself.

For AI companies, that distinction could prove significant because it separates studying copyrighted material from directly copying it.

Competition Could Be The Key Issue

A case involving Thomson Reuters and Ross Intelligence offers a different perspective. A court ruled that Ross could not claim fair use after using Reuters’ copyrighted material to develop a competing AI-powered legal research platform.

The decision suggests courts may be less willing to consider AI training fair use when copyrighted content is used to build a product that directly competes with the original.

For authors, an unresolved question is whether AI-generated content should be considered competition for the works used to train these models.

The Law Has Yet To Catch Up

US copyright law predates generative AI by decades, leaving courts to apply old principles to new technology. Questions also remain over copyright protection for AI-generated works. In Thaler v. Perlmutter, a court ruled that material created entirely by AI cannot receive copyright protection.

Major AI companies remain involved in copyright litigation, and different courts could reach different conclusions. For now, there is no universal rule: the legality of AI training will depend on the circumstances of each case and how courts ultimately interpret copyright and fair use.

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