The official chronicler of business cycles in the United States, the National Bureau of Economic Research, a not-for-profit group founded in 1920, would declare, though many months later, that a recession had set in that August. But in September, no one was aware of it. There were the odd signs of economic slowdown, especially in some of the more interest-rate-sensitive sectors—automobile sales had peaked and construction had been down all year, but most short-term indicators, for example, steel production or railroad freight car loadings, remained exceptionally strong.