What Big Macs reveal about the euro

For the past 24 years, The Economist has published an index using an almost-universally consumed product, the McDonald's Big Mac, as a price gauge. Now it says the euro - and several other currencies - are overvalued.

According to The Economist's Big Mac index, the euro and a basket of other global currencies are overvalued. But how reliable is this signal?

Currency analysis using burgers

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Tim graduated with a history degree from Cambridge University in 1989 and, after a year of travelling, joined the financial services firm Ernst and Young in 1990, qualifying as a chartered accountant in 1994.

He then moved into financial markets training, designing and running a variety of courses at graduate level and beyond for a range of organisations including the Securities and Investment Institute and UBS. He joined MoneyWeek in 2007.