Gold Gets a $2.7B US Backstop - And Antimony Too

Gold Gets a $2.7B US Backstop - And Antimony Too

The US government’s largest-ever critical minerals financing commitment signals a strategic shift that could reshape both domestic gold supply and the global antimony market.

What to know

• Perpetua Resources has secured $2.7 billion in EXIM Bank funding for its Stibnite gold-antimony project in Idaho - the largest US critical minerals financing to date.

• The project is expected to produce approximately 450,000 ounces of gold annually alongside significant antimony output, addressing a mineral where China controls over 80% of global supply.

• With gold trading near $4,754/oz - well above the project’s original feasibility assumptions - the economics look considerably more attractive than when the mine was first proposed.

What happened

Perpetua Resources has locked in $2.7 billion in financing from the US Export-Import Bank for its Stibnite gold-antimony project in central Idaho. This is the single largest EXIM commitment to a critical minerals project on US soil, and it effectively de-risks what has been one of the most closely watched mine developments in North American precious metals.

The Stibnite project is projected to produce around 4.8 million ounces of gold over its mine life, with peak annual output near 450,000 ounces. But the strategic element is antimony - a metalloid essential for defence applications, flame retardants, and battery technology. Stibnite would become the only meaningful domestic source of antimony in the United States, a country that currently imports virtually all of its supply.

Capital costs for the project sit around $2.5 billion, with the EXIM funding covering the vast majority. Construction timelines suggest first production could arrive by 2028 or 2029, depending on permitting milestones.

Who’s involved

Perpetua Resources is the developer, but Washington is the real protagonist here. The EXIM Bank’s involvement reflects a broader federal push to onshore critical mineral supply chains - a priority that has intensified as geopolitical friction with China shows no sign of easing. Beijing restricted antimony exports in late 2024, and prices have roughly tripled since.

For gold investors, the project adds meaningful future supply to a market where new large-scale mines have become increasingly rare. Few deposits globally offer both scale and strategic mineral co-production. That dual revenue stream - gold plus antimony - gives Stibnite an unusual economic profile that insulates it from single-commodity price swings.

Idaho’s state government has been broadly supportive, though environmental permitting has been a multi-year process. The project sits in a historically mined area, and Perpetua has committed to significant environmental restoration as part of its development plan.

Why it matters

The financing milestone matters on two levels. First, it validates the economic case for new US gold production at a time when the gold price is trading around $4,754/oz - a level that would have seemed fantastical when Stibnite’s feasibility studies were originally modelled at far lower assumptions. At current spot prices, the project’s economics are exceptionally robust, with margins that could support accelerated capital recovery.

Gold has gained nearly 9% over the past week alone, and even after pulling back over 10% from its monthly high above $5,400, prices remain at levels that make almost any credible gold deposit viable. Stibnite is more than credible - it is one of the largest undeveloped gold-antimony deposits in the world.

Second, the antimony angle carries genuine national security weight. China’s dominance of antimony supply mirrors its grip on rare earths, and Washington is clearly willing to deploy significant capital to change that equation. The EXIM funding structure - government-backed debt rather than equity dilution - is a template that other critical mineral projects will try to replicate.

The broader signal is that US industrial policy is now actively shaping the mine development pipeline. That has implications for permitting timelines, project financing costs, and ultimately the supply outlook for gold and strategic metals over the next decade.

What to watch

Permitting progress is the immediate variable. The EXIM commitment is conditional on final approvals, and any delays in the Record of Decision from federal agencies would push production timelines further out. Antimony prices are worth tracking - if Chinese export restrictions tighten further, the strategic premium on Stibnite’s antimony output rises materially, potentially making the antimony revenue stream as valuable as the gold.

On the macro side, this week’s US retail sales and ADP employment data could influence the dollar and, by extension, gold’s near-term direction. A softer labour print would likely support gold above the $4,700 level, reinforcing the investment case for projects like Stibnite that are being built into a structurally higher price environment. Whether other EXIM-backed mining deals follow remains uncertain - if Stibnite becomes the template, the US critical minerals pipeline could expand faster than the market currently expects, though permitting and political headwinds could just as easily stall the momentum.

This article is for informational purposes only and does not constitute financial advice. Always do your own research before making investment decisions.