Trade War Calms, But Rare Earth Supply War Simmers On

Headlines about Donald Trump's tariffs have quieted down, but underneath the truce a rare earth supply war between the US and China is intensifying, and it is already shaping currency markets even though it rarely makes the front page. The truce reached by Washington and Beijing last year has been extended until next January, which stopped the tit-for-tat tariff escalation but did nothing to build mutual assurances against future hostilities. Both sides are using the calm to position for the next round, treating supply chains for critical minerals and semiconductors as a national security priority rather than a normal commercial matter.

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What Actually Happened

Instead of building weapons, the US and China are now fighting over who controls the supply chains that feed modern technology and defence industries. China's Xi Jinping has pushed to tighten the world's dependence on Chinese production chains, while the Biden era "small yard, high fence" strategy aimed to restrict China's access to a narrow set of advanced technologies. That narrow approach has expanded. Washington has widened export restrictions on chips, lithography machines and investment flows, while Trump's tariffs add another layer of pressure. China, in turn, has leaned on its dominance of critical minerals, throttling exports of rare earths and magnets last year to retaliate against US tariffs and chip restrictions. Some of those controls have since been eased, but many remain in place, and China has also used mineral access as a tool against other countries.

Currency Pairs Caught in the Rare Earth Supply War

The rare earth supply war matters for forex because it is a dollar and yuan story wrapped in an industrial policy fight. USD/CNH tends to weaken when Beijing signals new export controls on minerals or chips, since investors price in slower Chinese growth and capital outflows, then firms up again when restrictions are eased, as happened after last year's rare earth curbs were partly rolled back. The Australian dollar is sensitive too, given Australia's own critical minerals sector, which can benefit when the US pours money into alternative mining and processing projects to close China's lead. Safe haven flows into the yen and the dollar itself tend to pick up whenever either government announces fresh restrictions, because markets read any escalation in the rare earth supply war as a signal that global supply chains, and therefore global growth, face new friction. Readers who already track USD/JPY behaviour around geopolitical stress will recognise the pattern: tension pushes capital toward perceived safety, calm pulls it back out.

Who Benefits and Who Loses

The US is pouring hundreds of millions of dollars into projects to mine and process rare earths and other critical minerals domestically, which could eventually benefit dollar linked mining and processing plays and reduce America's exposure to Chinese leverage. China benefits in the near term from its near total control over rare earth and magnet supply, which the International Energy Agency estimates could cost the US and European economies about $1.5tn a year if Beijing fully blocked access. But China also loses from its own strategy over time, since its mercantilist model of massive export growth with almost no import growth is not sustainable for trading partners that keep absorbing the imbalance. Countries caught in the middle, including those that try to diversify away from Chinese mineral inputs, risk being targeted directly, which is its own currency risk for emerging market partners tied closely to China's industrial supply chains.

What This Means for You

Even if you never trade a currency pair, the rare earth supply war can show up in your own costs. Rare earth magnets sit inside electric vehicles, wind turbines, smartphones and the kind of advanced electronics that depend on long, global supply chains, so any renewed throttling of exports tends to feed into higher manufacturing costs, which eventually shows up in retail prices. If you hold savings in dollar or yuan denominated assets, or your pension has exposure to semiconductor or mining stocks, swings in sentiment around new export controls can move those valuations even without a single new tariff being announced. Borrowers should watch how central banks react if supply chain friction pushes up input costs and inflation, since that is one route back to higher rates. None of this requires a trading account to matter. It simply means the headlines calling the trade war "over" are describing a pause in tariffs, not an end to the deeper fight over who controls the technology of the future.

Risks to This View

The biggest risk to any clean currency read on the rare earth supply war is that both governments have strong reasons to avoid a full rupture before the current truce expires next January, so markets could keep underpricing the risk simply because nothing dramatic has happened yet. There is also a chance the two sides agree on what counts as a legitimate national security restriction, something closer to a clearly defined "yard" of controlled technology, which would calm currency markets further rather than escalate them. On the other side, history offers a less comforting parallel: cutting off access to raw materials has preceded real conflict before, as when blocked supplies of oil and scrap steel in the lead up to the second world war hardened confrontation rather than defusing it. If either Washington or Beijing reads the other's next move as an attack on its core economic security, the rare earth supply war could escalate faster than currency markets currently expect, and the calm in USD/CNH and other pairs could prove temporary. For pairs tied to global risk sentiment more broadly, the dynamics resemble those covered in Iran Oil Supply Shock Could Push Up Your Petrol Price, where a single supply disruption has outsized effects on prices well beyond the commodity itself.

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This article is market analysis and commentary, not financial advice.