The Bubble Index: USA (1790 – Present) (10080 days) peaks in early 1857. I say “early 1857” because the actual date, February 15th, was only an approximate date used to simulate the daily data. And as American historians know, the Panic of 1857 was disastrous and preceded the American Civil War. Note: The daily data is simulated based on yearly data points provided by the Davis Industrial Production Index.