Value of $100 in 1927, adjusted to 1929

What happened to prices between 1927 and 1929

Between 1927 and 1929, the Consumer Price Index went from 17.4 to 17.1. Cumulatively, prices declined 1.7%, which works out to an average of -0.87% per year. Put differently, a dollar in 1927 bought what $1.02 buys in 1929.

Consumer prices fell 1.7% in 1927, a mild retreat after three years of gradual increases and part of a shallow up-and-down pattern that ran through the second half of the decade. Aviation delivered the year’s signature moment: Charles Lindbergh departed Roosevelt Field, New York, on May 20 and landed at Le Bourget Field outside Paris roughly 33.5 hours later, the first person to fly the Atlantic solo and nonstop. Detroit closed a chapter of its own that May, when Ford halted the Model T’s production line after nearly 19 years and more than 15 million cars sold, idling tens of thousands of workers while its factories retooled for the Model A. The Federal Reserve, meeting with European central bankers that summer, cut its discount rate to ease pressure on currencies still recovering from the war, a move later cited by economists including Milton Friedman and Anna Schwartz as fuel for the stock market speculation that built through the following two years. First-class postage held at 2 cents.

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The destination year: 1929

Consumer prices were unchanged in 1929, the CPI’s annual average flat for the second time in six years and a fitting close to a decade that began with wartime inflation and ended in rough price stability. By year’s end the index stood 14.5% below its 1920 peak and roughly 73% above its 1913 starting point, a reminder that even a “stable” decade left prices well above where they had started. The stability in the cost of living masked what was building in financial markets. The National Bureau of Economic Research dates the start of the Great Depression to that August, the month the business cycle peaked, months before most Americans noticed anything was wrong. The break came that October: panic selling hit Wall Street on Black Thursday, October 24, and returned even worse on Black Tuesday, October 29, when the Dow Jones Industrial Average fell about 12% in a single session. Billions of dollars in paper wealth disappeared within days, and the crash marked the start of a downturn that would pull consumer prices into their steepest sustained decline of the 20th century over the next four years. First-class postage was still 2 cents, a price that would hold until 1932.

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