`` By Metal Miner `` `` The Automotive MMI (Monthly Metals Index) moved sideways, dropping a slight 2.3%. This comes as the US automotive market, manufacturers in particular, are facing a one-two punch of rising costs and potential shortages in their metal supply chains. A big reason for this is steep tariffs on steel, aluminum and other inputs, which are driving up raw material costs. `` automotive MMI, september 2025 `` How Are Tariffs Driving Up Costs for the US Automotive Market `` `````` The US govern ...