I wrote a story about poor Clarence who retired in 1979, and even poorer Larry who retired last year. I created these characters to challenge the notion of calculating a real interest rate by subtracting inflation. The idea is that the decline of a currency can be measured by the rate of price increases. This price-centric view leads to the concept of purchasing power—the amount of stuff that a dollar can buy. It’s the flip side of prices. When prices rise, purchasing power falls.
Recall in the story, Clarence retired in 1979. At the time, inflation was running at 14% but he could only get 11% interest. Real interest was -3%, and Clarence had a problem. He was losing his purchasing power.
Suppose Clarence bought gold. The purchasing power of gold held steady for the rest of his life (see this chart of oil priced in gold). Gold does solve this problem. However, gold has no yield. Clarence is only jumping out of the frying pan and into the fire. Sure, he escapes dollar debasement, but then he gets zero interest.
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