Value of $100 in 1918, adjusted to 1925

What happened to prices between 1918 and 1925

Between 1918 and 1925, the Consumer Price Index went from 15.1 to 17.5. Cumulatively, prices increased 15.9%, which works out to an average of 2.13% per year. Put differently, a dollar in 1918 bought what $0.86 buys in 1925.

1918 brought the steepest annual price increase the CPI had recorded: consumer prices rose 18.0% for the year, edging out 1917’s already sharp 17.4% as the economy stayed at full wartime mobilization for most of the year. A first-class stamp cost 3 cents, up from 2 cents the previous November under the War Revenue Act’s wartime tax increases. The war itself ended on November 11, when Germany signed an armistice with the Allied powers after more than four years of fighting in Europe, but the inflation built up over a year and a half of mobilization did not disappear along with the fighting. The bigger public health story that year was the influenza pandemic that reached the U.S. in a mild spring wave and then returned that fall in a far deadlier form, eventually killing roughly 675,000 Americans, more than the country’s combat losses in the war. It hit factories, docks, and shops alongside households, adding disruption to an economy already strained by wartime demand. Prices would keep climbing even after the armistice, into the postwar surge of 1919.

More about inflation in 1918 →

The destination year: 1925

Consumer prices rose 2.3% in 1925, the CPI’s largest single-year increase since the deflationary swings of the early 1920s, though still mild next to the double-digit inflation of the World War I years. The country’s cultural fault lines were on full display that summer in Dayton, Tennessee, where high school teacher John Scopes was tried July 10-21 for violating a state law against teaching evolution, a case that drew national press coverage and pitted prosecutor William Jennings Bryan against defense attorney Clarence Darrow. Real estate speculation, meanwhile, peaked in Florida, where buyers flipped undeveloped land in the Miami area on thin down payments, driving prices far above what the land itself could support; the bubble would collapse the following year. Detroit reshuffled that June too: Walter Chrysler reorganized the struggling Maxwell Motor Company into Chrysler Corporation, the start of what would become one of the American auto industry’s “Big Three.” First-class postage held at 2 cents for the sixth straight year.

More about inflation in 1925 →