Simon

What can Big Macs tell you about the global economy? | The Economist

Zanny Minton Beddoes, Edward Carr, Simon, Henry, Josh

Conceived by economics correspondent Pam Woodall, the Big Mac Index uses McDonald's standardized burger prices to gauge Purchasing Power Parity and identify currency misalignments across nations. While widely cited in academic research and occasionally utilized for long-term investment strategy, the metric remains largely symbolic for traders and has faced public rejection from countries like Taiwan that actively undervalue their currencies. Despite successes such as predicting the euro's initial overvaluation, the index cannot account for institutional confidence or central bank policies that frequently drive exchange rates away from theoretical PPP values.