What is a Section 301 investigation?

It is a U.S. trade tool that reviews alleged unfair practices by trading partners. If the investigation finds harm, the U.S. can impose targeted tariffs on specific products. The current probes include Switzerland and the EU, with comments due 15 April, hearings from 5 May, and completion targeted by end-July.

How could Donald Trump tariffs affect Swiss companies?

They could raise landed costs, pressure margins, and slow U.S. orders for exposed products. Pharmaceuticals were often spared in prior rules, but components and equipment may still face checks. Investors should assess U.S. revenue shares, price pass-through, supply-chain routes, and buffer liquidity for higher customs and compliance costs.

Which dates should Swiss investors watch?

Key milestones are 15 April for public comments, 5 May for hearings to begin, and a targeted wrap by end-July as Section 122’s 10% blanket tariffs lapse. Each stage can shift proposed coverage, so portfolio hedges and position sizes should be reviewed ahead of these dates.

Which Swiss sectors look most exposed?

Watches, machinery, precision tools, specialty chemicals, and some medtech accessories could face review if product lists widen. Pharmaceuticals were often spared, though not guaranteed. Exposure also depends on EU supply-chain links. Map HS codes and U.S. demand concentration to gauge duty sensitivity and potential pass-through.

Law and Government

US Tariffs Today, March 13: Section 301 Probe Targets Switzerland, EU

ByDanny Kontos March 14, 2026March 14, 2026

Donald Trump tariffs are back in focus for Switzerland as the U.S. launches Section 301 investigations into 16 partners, including Bern and the EU. The Supreme Court voided prior IEEPA tariffs, so Washington is pivoting to Section 301. Written comments are due by 15 April, hearings start 5 May, and completion is targeted by end-July as Section 122’s blanket 10% tariffs lapse. We explain what this means for Switzerland trade, sector exposure, and how investors can position around Donald Trump tariffs.