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The Big Mac index
The Big Mac index was invented by The Economist in 1986 an informal way of measuring the purchasing power parity (PPP) between two currencies and provides a test if they are at their “correct” level. It “seeks to make exchange-rate theory a bit more digestible.”
For example, using figues in July 2021: the price of a Big Mac was $5.65 in the US and €4.27 in the Euro area. The implied purchasing power parity is $1.32 to €1, that is $5.65 / €4.27 = 1.32.
This compares with an actual exchange rate of $1.18 to €1 at the time, thus the euro was undervalued against the dollar by 11%.
Dies ist ein Beispiel für Vizzlos "Spannweitendiagramm"
Ein Spannweitendiagramm ist die richtige Wahl, wenn Sie den Unterschied zwischen zwei Werten statt der Werte selbst hervorheben möchten.