Value of $100 in 1918, adjusted to 1926

What happened to prices between 1918 and 1926

Between 1918 and 1926, the Consumer Price Index went from 15.1 to 17.7. Cumulatively, prices increased 17.2%, which works out to an average of 2.01% per year. Put differently, a dollar in 1918 bought what $0.85 buys in 1926.

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.

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The destination year: 1926

Consumer prices rose 1.1% in 1926, a third straight year of mild inflation and part of the price stability that defined the middle of the decade. Florida’s real estate boom, which had peaked the previous year on speculative buying of undeveloped land, ended abruptly that September when the Great Miami Hurricane made landfall near the city, killing hundreds and wrecking the market for land whose value had rested on continued speculation rather than anything underneath it. In Detroit, Henry Ford moved his company to a five-day, 40-hour work week without cutting pay, a break from the standard six-day schedule that other large employers would gradually adopt over the following decades; Ford argued publicly that workers with more leisure time would also become better customers for the cars his factories built. Consumer prices remained low enough by historical standards that a first-class stamp still cost just 2 cents, the same price it had held since mid-1919.

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