Value of $100 in 1929, adjusted to 1934

What happened to prices between 1929 and 1934

Between 1929 and 1934, the Consumer Price Index went from 17.1 to 13.4. Cumulatively, prices declined 21.6%, which works out to an average of -4.76% per year. Put differently, a dollar in 1929 bought what $1.28 buys in 1934.

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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The destination year: 1934

Consumer prices rose 3.1% in 1934, the first annual increase since 1926; every year from 1927 through 1933 had been flat or falling, so the turn marked a real break after eight years without a single gain. Currency policy did some of the work. The Gold Reserve Act, signed January 30, formally devalued the dollar by raising the official price of gold from $20.67 to $35 an ounce, part of the administration’s deliberate effort to reflate prices after four straight years of deflation. Financial regulation tightened at the same time: the Securities Exchange Act of June 6 created the Securities and Exchange Commission to police stock exchanges and enforce disclosure rules, a direct response to the speculation blamed for the 1929 crash. The recovery was fragile and unevenly felt, especially on the Great Plains, where drought had turned overplowed farmland to dust. Over May 9-11, high winds lifted an estimated 350 million tons of topsoil into the air, darkening skies as far away as Washington and New York and giving city readers who had never seen a wheat field a first glimpse of the disaster building in Kansas, Oklahoma, and Texas. Consumer prices stood 35.4% above their 1913 level, still well below the 1929 peak but rising for the first time since the Depression began. First-class postage held at 3 cents.

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