Slide in Transportation Stocks Flashes Warning About Economy

Shares of transportation companies are falling twice as fast as the hard-hit U.S. stock market, reflecting investors’ expectations that a recession is likely ahead. 

The Dow Jones Transportation Average, which tracks 20 large U.S. companies ranging from airlines to railroads to truckers, has declined 12% this month. The S&P 500 and the Dow Jones Industrial Average are down about half that much.