Steel Dynamics, Inc. (STLD)

How it makes money

Revenue comes from selling steel, fabricated steel products, recycled scrap and, increasingly, aluminum by the ton, so results move with steel and metal prices as much as with volumes sold. Because its mills run on scrap rather than iron ore, and its own recycling operations supply much of that scrap, Steel Dynamics has a lower and more flexible cost base than integrated steelmakers, which supports profitability even when steel prices are weak, though it remains a commodity business with thin control over the price it charges.

Revenue by segment

Running mills on recycled scrap through electric-arc furnaces, backed by an in-house recycling network, gives Steel Dynamics lower capital and operating costs per ton than older integrated steelmakers using blast furnaces. That structural cost edge helps it stay profitable through the cycle, but steel remains a commodity: competitors run similar mini-mill technology, and none of them can charge more than the going market price for a ton of steel.

Steel demand tracks construction, automotive production and broader industrial activity, all of which expand and contract with the economy, and steel prices themselves swing widely with global supply and demand and with trade policy. Steel Dynamics' results have historically moved up and down sharply with these cycles, even though its lower cost base helps it stay profitable in the troughs where higher-cost competitors lose money.

Key risks

• Steel price cyclicality — Steel prices move with global supply, demand and trade policy, and a sustained price downturn compresses margins across all of Steel Dynamics' operations at once, since steel, scrap and fabrication all move together.
• Trade policy and tariff exposure — Steel Dynamics' results are affected by US and foreign tariffs, quotas and trade disputes, which can help domestic producers when they restrict imports but can also invite retaliation or be reversed by future policy changes.
• Large capital projects and execution risk — Steel Dynamics is investing heavily in new capacity, including its aluminum business; cost overruns, delays or weaker-than-expected demand for the new output would reduce the return on that spending.
• Energy cost exposure — Electric-arc furnaces consume large amounts of electricity, so rising power costs directly raise production costs in a business that cannot easily pass higher costs through in a commodity market.