Banknote Blog
What Is the CPI? The Number That Moves Markets (and Our Discounts)
Explainer · Inflation · Inflation Day
What Is the CPI? The Monthly Number That Moves Markets (and Sets Our Discounts)
Once a month, at 8:30 in the morning Eastern time, the U.S. government publishes a single percentage. Bond desks reprice trillions of dollars within minutes. Your Social Security check, your tax brackets, and, at Planet Banknote, your discount code all trace back to it. Here is what the Consumer Price Index measures, how to read it, and why banknote collectors watc
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Aug 25th 2026 -
Hungary 1946: The Worst Hyperinflation Ever
Numismatic Reference · Hungary · Hyperinflation
Hungary 1946: The Worst Hyperinflation in History, and the Banknote With 20 Zeros
Zimbabwe gets the fame. Weimar gets the textbooks. But the most extreme monetary collapse ever recorded happened in Hungary in the summer of 1946 — and it produced the highest-denomination banknote ever issued.
Quick answer: The worst hyperinflation in history occurred in Hungary between August 1945 and July 1946. At its peak, monthly inflation r
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Aug 20th 2026 -
3.4% Inflation vs. Real Hyperinflation: The Scale
Collector's Guide · Hyperinflation · August 2026
What Does 3.4% Inflation Look Like Next to Real Hyperinflation?
The August 2026 CPI print came in at 3.4% — enough to make headlines. The banknotes in a hyperinflation collection come from economies where that was a good hour. Here's the honest scale of the difference.
Quick answer: At 3.4% annual inflation, prices take roughly 20 years and 9 months to double. During Hungary's 1946 hyperinflation — the worst ever record
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Aug 20th 2026 -