Fixed Exchange Rates: When Governments Play Currency Babysitter
Discover how fixed exchange rates work, why countries use them, and the pros and cons compared to floating rates. Essential reading for IB Economics students!
IB ECONOMICS HLIB ECONOMICSIB ECONOMICS SLIB ECONOMICS THE GLOBAL ECONOMY / INTERNATIONAL TRADE
Lawrence Robert
5/3/20256 min read


Fixed Exchange Rates: When Governments Play Currency Babysitter
Last time we explored floating exchange rates - those free-spirited currencies that roam wild in the foreign exchange wilderness. But not all currencies get to live such carefree lives. Some have strict parents watching their every move - welcome to the world of fixed exchange rates!
What's a Fixed Exchange Rate, Anyway?
A fixed exchange rate is exactly what it sounds like - a currency value that's locked in place against another currency (or basket of currencies). Imagine if your parents decided you could only trade one packet of crisps for exactly two chocolate bars - no negotiation allowed. That's essentially what governments do with fixed exchange rates.
The central bank becomes the ultimate currency referee, constantly buying and selling foreign currencies to keep their own currency at the predetermined value. It's like that friend who always makes sure everyone has exactly the same amount of pizza slices at a party.
Why Would Any Government Want This Headache?
Fair question! There are two main reasons:
Export-Import Control: The value of your currency massively impacts how competitive your exports are and how expensive your imports become. If you're an export-focused economy (like many developing nations), keeping your currency at a competitive (often lower) value can be super attractive.
Stability and Confidence: Business people and investors generally hate uncertainty. A fixed rate creates predictability - businesses know exactly how much their international transactions will cost next week, next month, and next year. This confidence can positively influence trade, economic growth, and employment.
Real-World Example: Hong Kong's Long-Term Relationship
Hong Kong has been in the longest currency relationship ever - its dollar has been fixed to the US dollar at HK$7.80 = US$1 since October 1983. Talk about commitment! The Hong Kong Monetary Authority (HKMA) actively maintains this relationship by constantly adjusting supply and demand in the currency market.
This stability helped Hong Kong maintain its status as a global financial center even through turbulent times like the 1997 handover to China and the Asian Financial Crisis. It's like having that stable relationship while everyone else around you is opting for divorce!
Currency Makeovers: Devaluation and Revaluation
Sometimes governments decide to change the fixed value of their currency - like getting a dramatic haircut, but for money.
Devaluation: The Strategic Markdown
Devaluation happens when a government officially lowers its currency's value in a fixed exchange rate system. It's like a nationwide sale where a government says, "Our currency is now 10% off!"
Why do it? To boost exports! When China devalued the yuan by nearly 2% in August 2015, it made Chinese goods cheaper for foreign buyers, giving their exports a competitive edge. Clever, right?
But there's a downside - imports become more expensive, which can trigger inflation. Imagine if overnight everything from abroad (like that iPhone you've been saving for) suddenly cost 10% more!
Revaluation: The Currency Upgrade
Revaluation is the opposite - officially increasing your currency's value. It's like your country saying, "Actually, our money is worth more now."
Why do it? Maybe to:
Make essential imports more affordable (think food, medicine, or energy)
Control inflation by making imports cheaper
Respond to political pressure from trading partners (China has occasionally revalued the yuan after pressure from the US)
How Does This Actually Work? Let's Visualise It!
Devaluation in Action: The Hong Kong Example
Imagine Hong Kong notices that its exports are becoming less competitive. Here's how they might devalue:
US consumers want more Hong Kong products, increasing demand for HK$
This pushes the exchange rate up (HK$ appreciates)
Hong Kong exports become more expensive and less competitive
To counter this, the HKMA increases the supply of HK$ (by printing more money)
They use this money to buy US dollars
The increased supply of HK$ pushes its value back down to the fixed rate
It's like a parent seeing their child getting too many compliments and reminding everyone about that embarrassing thing they did last Christmas - just to keep them humble and objective!
Revaluation Reality: The China Story
China has occasionally revalued the yuan when under international pressure. Here's how:
Chinese consumers buy lots of US imports, increasing supply of yuan
This would naturally push the yuan's value down
To maintain the fixed rate, China's central bank buys yuan using its foreign reserves
This increases demand for yuan and restores the fixed exchange rate
If they decide to revalue, they'll set the fixed rate at a higher level
It's basically like your parents suddenly deciding your allowance is worth more - but only when their friends are watching!
The Middle Ground: Managed Exchange Rates
Not all countries go full control-freak with fixed rates, nor do they all let their currencies run completely wild. Many opt for the middle path - managed exchange rates.
A managed exchange rate (sometimes called a "dirty float") is like having a currency on a long leash - it can move around freely, but only within certain boundaries. If it tries to stray too far, the central bank yanks it back into line.
Singapore: The Master of Management
Singapore is famous for its managed exchange rate system. The Monetary Authority of Singapore (MAS) lets the Singapore dollar float, but within a secret trading band of approximately +/- 3% against a basket of currencies.
If the Singapore dollar strengthens too much (harming exports), the MAS increases its supply. If it weakens too much (making imports expensive), they buy it back. It's like being at a party where you can dance however you want - but if you start doing anything too embarrassing, your friend will drag you off the dance floor!
Overvalued vs. Undervalued: Currency Miscalculations
Sometimes currencies aren't priced "correctly" compared to their true market value:
Overvalued Currency: The High-Maintenance Friend
An overvalued currency is worth more than it should be based on economic fundamentals. Signs include:
Persistent trade deficits (imports exceed exports)
Foreign reserves being depleted to maintain the currency value
Black market exchange rates that differ significantly from the official rate
The British pound was famously overvalued when it was part of the European Exchange Rate Mechanism (ERM) in the early 1990s. This led to "Black Wednesday" in 1992 when currency speculators (including George Soros) bet against the pound, forcing the UK to withdraw from the ERM and devalue.
Undervalued Currency: The Secret Weapon
An undervalued currency is worth less than market forces would naturally determine. China has often been accused of keeping the yuan artificially undervalued to boost exports.
Benefits include:
Super-competitive exports
Growing foreign exchange reserves
Potential for rapid economic growth
Drawbacks include:
More expensive imports causing inflation
International tension with trading partners
Reduced purchasing power for citizens
Fixed vs. Floating: The Ultimate Showdown
Each system has its pros and cons:
Fixed Exchange Rate Advantages:
Certainty and stability - businesses can plan ahead without worrying about exchange rate fluctuations
Reduced speculation - fewer opportunities for currency traders to cause havoc
Discipline for government policies - forces governments to maintain policies that support the fixed rate
Fixed Exchange Rate Disadvantages:
Opportunity costs - requires massive foreign currency reserves that could be used elsewhere
Limited currency liquidity - less currency available for private investors
Handcuffed monetary policy - interest rates must be used to maintain the exchange rate rather than manage domestic economy
Real-World Application: Argentina's Fixed Rate Disaster
In the 1990s, Argentina pegged its peso to the US dollar at a 1:1 rate. Initially, this helped control hyperinflation, but when the US dollar strengthened in the late 1990s, Argentina's exports became uncompetitive. Unable to devalue due to the fixed system, Argentina plunged into a devastating economic crisis by 2001.
Why Fixed Rates Are Becoming Endangered Species
Fixed exchange rates used to be much more common (remember the gold standard?). Today, they're relatively rare because:
The global economy is massively interconnected
Capital flows are huge and rapid
Few economies have the foreign reserves needed to maintain a fixed rate long-term
Most countries want to maintain control of their monetary policy
Countries that still use fixed rates typically have specific reasons - like Hong Kong's close economic ties with the US, or small nations that need stability more than monetary independence.
What This Means For Your IB Exams
Exchange rate systems are evaluation goldmines! When discussing them in your exams, remember:
There's no "perfect" exchange rate system - each has trade-offs
The appropriate system depends on a country's specific circumstances
Even within each system, there are variations and hybrid approaches
Policies that work in the short term might fail in the long term
The Big Picture
Understanding different exchange rate systems is key to making sense of global economic relationships. Next time you hear about China being accused of "currency manipulation" or a developing country experiencing a "currency crisis," you'll understand the underlying mechanisms.
And while all this might seem like abstract economic theory, remember that exchange rate policies directly impact everything from the price of your holiday spending money to whether your future job might be outsourced to another country!
If you were advising a small, export-dependent developing country, would you recommend a fixed, floating, or managed exchange rate system? Why?
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