Dollar’s Purchasing Power Plunged at Constant Speed

By Wolf Richter for WOLF STREET.

The Consumer Price Index (CPI) jumped 0.5% in July from June, after having jumped 0.9% in June, 0.6% in May, for a three-month annualized rate – the three-month momentum – of 8.1%. Year-over-year, CPI jumped 5.4%, same pace as in June, and the fastest since June 2008 (5.6%), all of which had been the fastest since January 1991, according to data released by the Bureau of Labor Statistics today.

The CPI without the volatile food and energy components (“core CPI”) rose by 0.3% for the month and by 4.3% year-over-year.

The CPI measures the loss of the purchasing power – well, part of the loss of the purchasing power, as we’ll see in a moment – of the consumer dollar and thereby the purchasing power of labor. In July, this purchasing power dropped another 0.5% for the month, and for the past three months annualized, it dropped by 8.6% – “Honey, where did my big raise go?”