The price of a Big Mac in Switzerland is the most expensive in the world.

The Big Mac Index is a simple guide to measure whether the exchange rate between two countries' currencies is at the correct level. This is based on the theory of purchasing power parity (PPP), where in the long run, the exchange rate will move in line with the prices of goods and services related to making a burger in two countries.

For example, the price of a Big Mac in the United States in July 2017 was US$5.3, while in China it was only US$2.92 (at the then-current exchange rate). This indicates that the raw materials for a Big Mac in China were undervalued by 45 percent compared to the United States.

The most expensive Big Mac in the world was in Switzerland, reaching US$6.74, meaning it was overvalued by 27.2 percent compared to the price of a burger in America. The high price of a Big Mac in Switzerland also indicates the high purchasing power of the people in that country for American fast food. Meanwhile, the price of McDonald's burger in Indonesia was ranked 50th out of 56 on the Big Mac Index list, at US$2.4, meaning it was undervalued by 54.7 percent. The Big Mac Index is an index published by *The Economist* magazine and is an informal way to measure PPP between two currencies.