The Signal

A tariff you can model is a cost. A tariff that the Supreme Court just declared unlawful is a refund — and a recalibration.

The dominant story: the Supreme Court has blocked executive tariff authority (May 2026). The ruling does two things at once. It triggers refund obligations for electronics importers who paid assessments under the now-invalidated authority — including the 25% Korean-electronics tariff and the China-routed component duties. And it forces an immediate cost-model recalibration: every landed-cost spreadsheet built around those tariff lines is now wrong, and procurement teams have to re-baseline their numbers this quarter.

This does not mean tariffs vanish — Congress retains constitutional tariff power, and new duties could be legislated. But the executive-imposed structure that has driven 2025–2026 cost volatility is struck down. For now, the tariff term in the cost model swings from a fixed penalty toward a refundable receivable.

Supply Chain

Tariff refunds — a cash-flow event. The refund pathway is real but creates urgency: filing windows, documentation requirements, and a finite processing capacity at CBP. Importers with clean duty-paid records should treat this as a cash-flow project with a deadline, not a windfall that arrives passively.

Logistics surcharges compound. UPS surcharges and FedEx capacity cuts continue. The tariff relief on the customs side is partially offset by rising freight on the carrier side. Net landed cost improves, but less than the headline tariff number suggests.

Excess-inventory platforms. Marketplaces like Mobius Materials — secondary trading of excess components — are gaining traction as the 2025–2026 hoarding cycle unwinds. Structured resale beats the gray market for both price discovery and counterfeit control.

ℹ️Refunds, recalibration, and origin documentation

The refund process rewards clean records. The same country-of-origin discipline that minimized tariff exposure during the 25% Korea regime — knowing exactly where a part was stamped and plated — is what makes a refund claim defensible now. POCONS' Vietnam stamping and plating, with certificates available pre-order, produces exactly the documentation trail a refund filing needs.

Korean Intel

Major Korean memory and component makers remain strategically quiet ahead of earnings. One point of predictability: naphtha feedstock costs have stabilized around $680/MT, which gives the polymer supply chain — connector housings, cable jacketing, molded components — a brief window of cost predictability after months of cracker-driven volatility.

Technical — Design Corner: AI EMI Tools Cross the Chasm

AI-driven design tools have moved from experimental to production-ready — and the EMC workflow is a direct beneficiary. The headline metric: EMI prediction and trace-optimization cycles for complex mixed-signal boards are compressing from roughly 8 weeks to 3 weeks.

The mechanism is worth understanding. Traditional EMI sign-off relies on full-wave electromagnetic solvers — method-of-moments or FDTD field simulation — which are accurate but computationally expensive; a full board solve can take days, so engineers run few iterations and run them late. AI-accelerated tools use surrogate models — neural networks trained on large corpora of solver results — to predict emission profiles in seconds rather than days. That turns EMI from a late-stage gate into a continuous, in-the-loop design constraint.

💡Where AI prediction ends and hardware begins

Surrogate EMI models are fast but they are predictions — accurate within their training distribution, less trustworthy outside it. A genuinely novel topology or an unusual stack-up can fall outside what the model has seen. The discipline: use AI prediction to iterate fast and converge early, then confirm with a full-wave solve and a chamber measurement before tooling. And keep the deterministic hardware backstop — a properly grounded board-level shield bounds the radiated result regardless of what the surrogate model predicted.

One Thing

Two transitions defined this issue: a legal one removing the executive tariff structure, and a technical one making AI EMI prediction production-ready. Both reward the same discipline — clean documentation and early, deterministic verification. The teams that win the next quarter are the ones who treat the refund as a project and the AI prediction as a hypothesis, then confirm both against hard records and hard measurements.

POCONS USA — EMI shields + components. Products manufactured in Korea (IATF 16949); stamping and plating in Vietnam; US operations in San Diego. — Mike Kwak, POCONS USA