Trump Greenland Security Pact Sends Rare‑Earth Stocks Soaring, Critical Metals Jumps Over 30%

SentiSense · Published Sep 21, 2026, 8:25 AM ET · Updated Sep 28, 2026, 2:45 AM ET

A US security arrangement with Greenland and Denmark sent rare-earth stocks higher on September 21, 2026. Critical Metals, owner of the Tanbreez project, was up 25% early and 38% by mid-morning, while USA Rare Earth and MP Materials, which hold no Greenland assets, rose in sympathy. The pact text is unpublished and grants no new mining rights or permits.

A US security arrangement with Greenland and Denmark set off a rally in rare-earth stocks on Monday, September 21. CRML, which controls the Tanbreez rare-earth project, Greenland's only rare-earth exploitation permit, led the move. 24/7 Wall St. had it up 25% at $8.41 at 8:31 a.m. ET, and Yahoo Finance reported a 38% gain by 10:49 a.m., with an intraday peak of 43%.

The rally spread to names with no Greenland exposure. USAR rose 6% early and 9% later in the morning, and MP gained 4% early and 6% later, while the VanEck Rare Earth ETF rose 2%. Both 24/7 Wall St. and Yahoo described those moves as sympathy trades, since neither company holds assets in Greenland.

The key caveat is that nothing concrete changed for the mines. Both outlets noted the security pact's text is unsigned and unpublished and grants no new mining rights, permits or capital to Tanbreez, so the move reflects sentiment about US strategic interest in Arctic supply chains rather than a shift in project economics. 24/7 Wall St. also flagged Critical Metals as a pre-revenue explorer carrying a going-concern doubt.

What to watch: publication of the pact's actual terms, any US financing or offtake commitments for Greenland projects, and whether the sympathy gains in producers such as MP Materials hold once the headline fades.