Monday, February 03, 2025

The Big Mac Index: A Bite-Sized Measure of Global Currency Value.

 #612

Context: Every January the Economist releases the BIG MAC INDEX, which I track closely. 


If you’ve ever wondered how to judge whether a currency is overvalued or undervalued, forget complex economic theories—just look at the price of a burger! Specifically, the Big Mac Index, an informal yet fascinating tool that has been gauging currency valuation for 25 years.

The History of the Big Mac Index

The Economist introduced the Big Mac Index in 1986 as a lighthearted yet insightful way to measure purchasing power parity (PPP). The premise is simple: a Big Mac, being a globally standardized product made with nearly identical ingredients and processes, should cost roughly the same everywhere if exchange rates were fair. However, in reality, local costs, wages, and currency valuations impact the price, leading to interesting comparisons across economies.

Over the past 25 years, the index has evolved from a humorous reference to a respected, though imperfect, economic indicator. It has expanded to cover more countries, providing an accessible snapshot of global currency disparities.

India’s Big Mac Journey

India was included in the Big Mac Index around 2015, but with a twist—there is no beef Big Mac in India! Instead, the index tracks the Maharaja Mac, a chicken-based alternative. Since its inclusion, the Indian Rupee has been consistently undervalued, hovering around 55% below the implied PPP value when compared to the US dollar.

What does this mean? Essentially, if you convert US dollars into rupees, you could buy a Big Mac (or its Indian equivalent) at a significantly lower price than in the US. While this undervaluation benefits exporters, making Indian goods cheaper in foreign markets, it also makes imports more expensive, increasing costs for foreign goods and technology.

Examples of Undervalued and Overvalued Currencies

The Big Mac Index offers a simple way to understand currency valuation, and here’s how it applies to different economies:

  • India (Undervalued Currency): The Indian Rupee has remained undervalued for over a decade, typically around 50-60% below its fair PPP value. This makes India an attractive destination for outsourcing and manufacturing but results in expensive imports, particularly for electronics, luxury goods, and crude oil. For example, in 2024, a Big Mac costs around ₹200 in India, while it sells for $5.50 in the US. Converting at market rates would imply a 55% undervaluation.

  • Norway (Overvalued Currency): The Norwegian Krone, on the other hand, has consistently been overvalued. A Big Mac in Norway might cost around 50 NOK (~$5.80), whereas in the US, it’s around $5.50, indicating that the Krone is overvalued. This means Norwegians experience a higher cost of living, and their exports can be more expensive, impacting trade competitiveness.

  • United Kingdom’s Shift: Historically, the British Pound was overvalued for most of the Big Mac Index’s history, making the UK an expensive destination. However, due to recent economic shifts post-Brexit and inflationary pressures, the Pound has become undervalued against the dollar. For instance, in the 2000s, a Big Mac in the UK was typically more expensive than in the US, whereas now, it often costs less, indicating a relative currency devaluation.

Global Trends and What They Tell Us

The Big Mac Index has consistently highlighted some interesting global currency trends:

  • Switzerland & Norway often top the list of overvalued currencies, making their Big Macs some of the priciest in the world.

  • Egypt & Venezuela have seen extreme undervaluation due to inflationary pressures and economic instability.

  • China’s Yuan was long considered undervalued, fueling trade tensions, but it has seen shifts toward fairer valuation in recent years.

  • India, for the past decade, has remained in the 'undervalued' category, reinforcing its position as an affordable destination for outsourcing and manufacturing but posing challenges for consumers of imported goods.



Beyond the Big Mac: Other Indicators to Consider

While the Big Mac Index is an entertaining and useful tool, it has its limitations. A burger doesn’t capture the full economic reality of a country. Here are some alternative indicators that could complement the Big Mac Index:

  1. Haircut Index – The cost of a basic haircut varies widely across countries, reflecting local wage levels and service industry pricing.

  2. Starbucks Index – Coffee prices are often used to measure affordability and global price disparities.

  3. iPhone Index – The cost of an iPhone in different countries is a useful measure of technology affordability and taxation.

  4. Cost of Public Transport – This provides insight into infrastructure costs and subsidies in different economies.

Pondering Thoughts and Fun Facts

  • A Big Mac in India costs nearly one-third of its US price, highlighting the rupee’s persistent undervaluation.

  • McDonald’s itself adapts to local economies, offering different pricing structures and meal sizes in different countries.

  • The Economist now offers an adjusted index, factoring in GDP per capita to provide a more balanced perspective.

Final Thoughts

The Big Mac Index remains an intriguing way to understand currency values and the cost of living worldwide. While it’s not a perfect economic measure, it does provide a fun, digestible way to see how far your money goes in different parts of the world. Whether you’re a currency trader, an economist, or just a curious traveler, the Big Mac Index is a quirky yet insightful tool that continues to prove its worth—even after 25 years!

So next time you buy a Big Mac (or a Maharaja Mac here), take a moment to think—what does its price tell you about the world economy?

Karthik

3/2/25 

930am. 




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