China used to announce export controls one material at a time. This month they arrived together: rare earths for Japan, tungsten, tunnel-boring machines, drone motors, proposed curbs on solar technology and new rules on exporting AI models. For investors the point is not any single list. It is that more of the world’s supply chains now run through a decision in Beijing.
What changed this week
| Item | What was reported | Who it touches |
|---|---|---|
| Rare earths (yttrium) | Supplies to Japan stalled, with China citing security concerns | Jet engines, defence, electronics |
| Tungsten | Export ban reported | Defence, cutting tools, industry |
| Tunnel-boring machines | New export controls | Infrastructure builders, notably in India |
| Solar technology | Proposed controls on polysilicon, wafers and other PV technology | Solar makers outside China |
| AI models | Moves to control exports of top AI models | AI developers and their customers |
| Drone motors | Licence threshold set for drone motors, with a November deadline | Drone makers worldwide |
Some of these are proposals and some are in force, and the details can change. What they share is direction: tighter control over inputs other countries cannot quickly replace.
Who depends on these supplies
The companies most exposed are the ones that buy these materials, not the ones that mine them. A jet-engine maker that needs yttrium coatings, a solar panel maker that buys Chinese wafers, or a chip company whose plants use specialty metals all face higher costs or delays if supply tightens. Some are already responding: Micron, for example, was reported this week to be investing in US processing of indium, a metal used in chipmaking.
Who can gain and who can lose
- Possible gainers: miners and processors outside China, whose output becomes more valuable when Chinese supply is restricted.
- Possible losers: manufacturers that rely on Chinese inputs and cannot pass higher costs on to customers.
- Uncertain: Chinese exporters themselves, which lose customers if buyers find other sources.
Markets do not always reward the obvious winner. A rare-earth fund can sit near a 52-week low while the headlines are full of rare earths, as one exchange-traded fund was reported to this week, because prices already reflected the risk or because the restrictions are narrower than they sound.
How exposed portfolios have done
| Portfolio | 1 month | 3 months | 1 year | S&P 500, 1 year |
|---|---|---|---|---|
| Global Lithium & Copper Mining Index12 companies | −14.4% | −7.7% | +38.5% | +14.4% |
| Semiconductor Equipment NL/JP/US Index8 companies | −12.7% | −18.7% | +46.6% | +14.4% |
| Global Solar Index9 companies | −10.0% | −21.5% | −17.8% | +14.4% |
| US & China EV Supply Chain Index12 companies | −4.2% | −4.2% | −16.7% | +14.4% |
| Hypersonics & Missile Defense Index10 companies | −0.7% | −3.9% | −15.8% | +14.4% |
| American Reshoring & Industrial Renaissance Index15 companies | −0.4% | −3.0% | +22.1% | +14.4% |
| Japan Corporate Reform Index10 companies | −2.6% | +4.8% | +21.3% | +14.4% |
Prices up to 22 October 2026. Returns before each portfolio was made are simulated from real past prices, with no fees or taxes. Past performance is not a guide to the future.
As of 20 October, lithium and copper miners were up strongly over a year, while the solar portfolio and the US and China EV supply-chain portfolio were down. Chip equipment makers had fallen over three months despite a strong twelve months.
Building a supply-chain portfolio
If you want exposure to companies that benefit from supply moving out of China, be precise. “Rare earths” on its own pulls in a handful of small, volatile miners. A narrower idea usually holds up better.
This is research, not a recommendation. Commodity-linked shares can fall a long way, and restrictions can be lifted as quickly as they were announced.
