 Some sources (including the file Highlights/Lowlights of The Dow on the Dow Jones website) show a loss of 24.39% (from 71.42 to 54.00) on December 12, 1914, placing that day atop the list of largest percentage losses.The New York Stock Exchange reopened that day following a nearly four-and-a-half-month closure since July 30, 1914, and the Dow in fact rose several percent that day (from 71.42 to 74.56, or +4.4%).However, the apparent decline was due to a later 1916 revision of the Dow Jones Industrial Average, which retroactively adjusted the values following the closure but not those before, and it represents the only discontinuity in the index's history rather than an actual loss.