Visit the full analysis for the latest explanation of Steel Dynamics Inc.'s stock movement.
Steel Dynamics is one of the largest domestic steel producers in the United States, operating electric arc furnace mini-mills and a metals recycling business. The company recently reported record steel shipments in Q4 2025 and has been a major beneficiary of tariff protections on imported steel. The current selloff reflects the risk that those tariff protections may be rolled back, directly threatening the pricing premium that had driven STLD to all-time highs.