Trade War Supply Chain Risk: Planning for the Round, Not the Announcement

TL;DR: Between February 2025 and February 2026, US and Chinese trade measures moved as a chain of matched rounds, not as isolated events, and the chain kept moving even after the US Supreme Court erased the legal basis for the original tariffs. A supply chain plan built around one announced number is already out of date by the time the next round lands.

Key takeaways:

• Between February and April 2025, the US and China exchanged five escalating tariff rounds in about ten weeks, with the US rate on Chinese goods reaching 125 percent before a truce cut it back to 10 percent that May.[^1][^2]
• China paired nearly every 2025 round with a non-tariff instrument alongside the matching duty: export licensing on named rare earth elements, new entity-list additions, or a fresh anti-circumvention investigation.[^1]
• The EU built a three-phase retaliation package covering thousands of product lines against US steel and aluminum tariffs, then suspended it more than once as negotiations ran through 2025.[^3][^4]
• When the US Supreme Court struck down the legal authority behind the 2025 tariffs in February 2026, the White House had a replacement tariff, under a different statute, in place within days.[^5]
• One customs-data analysis found duty-deferred "warehouse and withdrawal" import entries rose from roughly one in ten of observed entries in 2024 to about one in six immediately after the 2025 tariffs took effect.[^6]

On April 2, 2025, Washington raised its tariff on Chinese imports to 34 percent. Nine days and two more rounds later, the rate stood at 125 percent, and China had matched or countered every single move along the way.[^1] A company that spent that April building a supply plan around the 34 percent figure was already three rounds behind by the time the plan was finished.

Five Rounds in Ten Weeks, Then More After That

The 2025-2026 US-China tariff fight is easiest to read as one dispute with one outcome. It is more accurate, and far more useful for planning, to read it as a sequence of discrete rounds, each one triggering the next on a short clock.

• February 2025. Washington imposed a blanket 10 percent tariff on Chinese imports. Beijing answered within days: new tariffs on coal, liquefied natural gas, crude oil and farm machinery, export controls on five named minerals (tungsten, tellurium, bismuth, molybdenum and indium), and two companies added to an unreliable-entity list.[^1]
• March 2025. The US rate doubled to 20 percent. China's response landed the same week: duties on chicken, wheat, corn, cotton, soybeans, pork and beef, fifteen defense companies added to an export control list, and an anti-circumvention investigation opened on optical fiber products.[^1]
• April 2025. The US rate jumped to 34 percent, then 84 percent, then 125 percent inside nine days. China matched each move step for step and added export-licensing requirements on seven rare earth elements.[^1]
• May through October 2025. A negotiated truce cut the US reciprocal rate to 10 percent for 90 days, later extended through November 2026, only for China to reimpose stricter rare earth export rules that October as the truce neared its edge, then suspend the new rules again days before a scheduled meeting between the two countries' leaders.[^2][^7]
• February 2026. The US Supreme Court ruled that the statute underneath the 2025 tariffs never authorized them in the first place. The White House had a replacement tariff, built on different legal authority, in place within days.[^5]

Trade War Supply Chain Risk Planning Means Modeling the Sequence, Not the Number

Each round in this chain carried its own internal logic. A US action drew a Chinese response inside one to seven days, almost every time, and that response nearly always paired a matching tariff with a separate non-tariff instrument aimed at a different pressure point: an export control, an entity-list addition, an investigation. Neither government treated any single move as the whole fight. Both built escalation and de-escalation into a repeated structure with its own cadence, and that cadence held steady even as the specific numbers changed six times in a year.

That cadence, not any individual tariff rate, is the actual unit worth planning against. The geopolitical risk sitting underneath this whole episode is not the 34 percent or the 125 percent; it is the coordinated, sequential response that any rate change sets off, and that pattern held steadier across 2025 and 2026 than any single number inside it. Plan around "the tariff is 34 percent, our margin absorbs that" and the plan is already a snapshot of something that moved on the day it was written. Plan instead around "a US move on this product line draws a matching response within a week, usually against an unrelated input we also source from the same country," and the plan still holds when the next headline lands.

The EU's 2025 retaliation package shows the same trap from the other side. Its published list, three phases deep, named specific products down to individual tariff codes, from soybeans and motorbikes to almonds by the final phase, each tied to a specific date.[^3][^4] Treating that list as a fixed exposure map meant tracking a target that moved twice before a single new duty actually landed. The list worked as a negotiating instrument, held in reserve and postponed repeatedly, not as a schedule anyone intended to run on time.

The Supreme Court ruling in February 2026 landed the identical lesson at the level of legal mechanism instead of product list. Firms that had built their entire compliance response around the specific statute the Court invalidated had days, not months, to rebuild once the White House shifted to a different legal basis for the replacement tariff.[^5] The rate changed. The underlying law changed. The gap between the ruling and the next tariff barely moved at all.

What Planning for the Sequence Actually Looks Like

• Track the response lag, not just the trigger. The 2025 record shows a one-to-seven-day gap between a tariff action and its counter-move on the other side; a monitoring process built to that clock catches the second round before it lands, not after the shipment is already stuck at the border.
• Price the non-tariff instrument alongside the duty. An export-licensing change or an entity-list addition moved in the same week as nearly every China tariff round in this record. A plan that tracks only the headline rate misses the input that actually gets held up.
• Treat a published retaliation list as a draft, not a schedule. The EU's list was amended and postponed more than once. Committing capital or contract terms against the first version of a list invites rework a few months later.
• Build duty flexibility ahead of the round, not during it. Customs data shows duty-deferred warehouse entries rising through 2025 as more importers positioned for a rate change before it happened rather than scrambling once it did.¹ The mechanism exists whether or not a company uses it; the next round arrives on the same short clock either way.

Fortius Intel note: The tariff figure in the headline is the least useful piece of information in the sequence. The response it triggers, and the clock that response runs on, is what a supply chain plan actually needs to hold onto.

Drawn from law firm and trade-publication reporting on 2025 and 2026 US, Chinese and EU trade actions, with figures cross-checked against a second contemporaneous source where more than one was available; see footnotes for sourcing on each specific claim.

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Footnotes

1. Air Cargo Week, "How the 2025 tariffs turned bonded warehousing into a treasury strategy," 2025, https://aircargoweek.com/how-the-2025-tariffs-turned-bonded-warehousing-into-a-treasury-strategy/ (retrieved 2026-09-05). Source for: the reported rise in warehouse-and-withdrawal customs entries from roughly 10 percent of observed US entries in 2024 to about 16 percent immediately after the 2025 tariffs took effect, per that analysis. ↩