<p>Within moments of Donald Trump’s upset victory in the 2016 election, investors began stampeding into the shares of America’s steelmakers. After all, this was a business he had explicitly pledged to rescue. “Your steel industry—we’re bringing it back, bringing it back, folks!” he had promised a wildly cheering crowd in Pittsburgh the previous April. So when trading opened the morning after election day, the buy orders were stacked high and prices began to rocket. By week’s end the S&P 500 was up 2%, but Steel Dynamics was up 13%, Nucor up 14%, Pittsburgh’s own U.S. Steel up 23%. For a Rust Belt industry in distress, deliverance had apparently come.</p>