According to this article (https://www.marketplace.org/2021/08/04/what-freight-rail-tells-us-about-the-economy/), Warren Buffett was once being asked which economic indicator he would choose if he were stranded on a desert island, and with access to only one set of economic statistics (e.g. consumer confidence, inflation, unemployment, etc.), and he picked freight rail traffic. The reason is that when rail is doing well, it usually means the eco...