Exchange rates – HubbardOBrienEconomics.com Blog

In the Face of Hyperinflation, Some People in Argentina Don’t Save Currency, They Save … Bricks

Argentina’s Argentina’s Economy Minister Sergio Massa coming from a meeting in Washington, DC with the International Monetary Fund to discuss the country’s hyperinflation. Photo from the Wall Street Journal.

Argentina has been through several periods of hyperinflation during with the price level has increased more than 50 percent per month. The following figure shows the inflation rate as measured by the percentage change in the consumer price index from the previous month for since the beginning of 2018. The inflation rate during these years has been volatile, being greater than 50 percent per month during several periods, including staring in the spring of 2022. High rates of inflation have become so routine in Argentina that an article in the Wall Street Journal quoted on store owner as saying, “Here 40% [inflation] is normal. And when we get past 50%, it doesn’t scare us, it simply bothers us.”

As we discuss in Macroeconomics, Chapter 14, Section 14.5 (Economics, Chapter 24, Section 24.5 ), when an economy experiences hyperinflation, consumers and businesses hold the country’s currency for as brief a time as possible because the purchasing power of the currency is declining rapidly. As we noted in the chapter, in some countries experiencing high rates of inflation, consumers and businesses buy and sell goods using U.S. dollars rather than the domestic currency because the purchasing power of the dollar is more stable. This demand for dollars in countries experiencing high inflation rates is one reason why an estimated 80 percent of all $100 bills circulate outside of the United States.

The increased demand for U.S. dollars by people in Argentina is reflected in the exchange rate between the Argentine peso and the U.S. dollar. The following figure shows that at the beginning of 2018, one dollar exchanged for about 18 pesos. By November 2022, one dollar exchanged for about 159 pesos. The exchange rate shown in the figure is the official exchange rate at which people in Argentina can legally exchange pesos for dollars. In practice, it is difficult for many individuals and small firms to buy dollars at the official exchange rate. Instead, they have to use private currency traders who will make the exchange at an unofficial—or “blue”—exchange rate that varies with the demand and supply of pesos for dollars. A reporter for the Economist described his experience during a recent trip to Argentina: “Walk down Calle Lavalle or Calle Florida in the centre of Buenos Aires and every 20 metres someone will call out ‘cambio’ (exchange), offering to buy dollars at a rate that is roughly double the official one.”

People in Argentina are reluctant to deposit their money in banks, partly because the interest rates banks pay typically are lower than the inflation rate, causing the purchasing power of money deposited in banks to decline over time. People are also afraid that the government might keep them from withdrawing their money, which has happened in the past. As an alternative to depositing their money in banks, many people in Argentina buy more goods than they can immediately use and store them, thereby avoiding future price increases on these goods. The Wall Street Journalquoted a university student as saying: “I came to this market and bought as much toilet paper as I could for the month, more than 20 packs. I try to buy all [the goods] I can because I know that next month it will cost more to buy.”

Devon Zuegel, a U.S. software engineer and economics blogger who travels frequently to Argentina, has observed one unusual way that some people in Argentina save while experiencing hyperinflation:

“Bricks—actual bricks, not stacks of cash—are another common savings mechanism, especially for working-class Argentinians. The value of bricks is fairly stable, and they’re useful to a family building out their house. Argentina doesn’t have a mortgage industry, and thus buying a pallet of bricks each time you get a paycheck is an effective way to pay for your home in installments. (Bricks aren’t fully monetized, in that I don’t think people buy bricks and then sell them later, so people only use this method of saving when they actually have something they want to use the bricks for.)”

Sources: “Sergio Massa Is the Only Thing Standing Between Argentina and Chaos,” economist. com, October 13, 2022; Devon Zuegel, “Inside Argentina’s Currency Exchange Black Markets,” devonzuegel.com, September 10, 2022; Silvina Frydlewsky and Juan Forero, “Inflation Got You Down? At Least You Don’t Live in Argentina,” Wall Street Journal, April 25, 2022; and Federal Reserve Bank of St. Louis, FRED data set.

Solved Problem: How Does the Value of the U.S. Dollar Affect the U.S. and World Economies?

Supports: Macroeconomics, Chapter 18, Economics, Chapter 28, and Essentials of Economics, Chapter 19.

Between June 2021 and September 2022, the exchange rate between the U.S. dollar and an average of the currencies of the major trading partners of the United States increased by 14 percent. (This movement is shown in the figure above.) An article in the New York Times had the headline “The Dollar Is Strong. That Is Good for the U.S. but Bad for the World.”

Briefly explain what the headline means by a “strong” dollar.
Do you agree with the assertion in the headline that a stronger dollar is good for the United States but bad for the economies that the United States trades with? Briefly explain.
During this period the Federal Reserve was taking actions that raised U.S. interest rates. The article noted that “Those interest rate increases are pumping up the value of the dollar ….” Why would increases in U.S. interest rates relative to interest rates in other countries increase the value of the dollar?

Solving the Problem

Step 1: Review the chapter material. This problem is about the effect of fluctuations in the exchange rate and the relationship between interest rates and exchange rates, so you may want to review Macroeconomics, Chapter 18, Section 8.2, “The Foreign Exchange Market and Exchange Rates,” or the corresponding sections in Economics, Chapter 28 or Essentials of Economics, Chapter 19.

Step 2: Answer part a. by explaining what a “strong” dollar means. A strong dollar is one that exchanges for more units of foreign currencies, such as British pounds or euros. (A “weak” dollar means the opposite: A dollar that exchanges for fewer units of foreign currencies.)

Step 3: Answer part b. by explaining whether you agree with the assertion that a stronger dollar is good for the United States but bad for the economies of other countries. A stronger U.S. dollar produces winners and losers both in the United States and in other countries. U.S. consumers win because a stronger dollar means that fewer dollars are needed to buy the same quantity of a foreign currency, which reduces the dollar price of imports from that country. For example, a stronger dollar reduces the number of dollars U.S. consumers pay to buy a bottle of French wine that has a 40 euro price. A strong dollar is bad news for foreign consumers because they must pay more units of their currency to buy goods imported from the United States. For example, Japanese consumers will have to pay more yen to buy an imported Hershey’s candy bar with a $1.25 price.

The situation is reversed for U.S. and foreign firms exporting goods. Because foreign consumers have to pay higher prices in their own currencies for goods imported from the United States, they are likely to buy less of them, buying more domestically produced goods or goods imported from other countries. U.S. firms will either to have accept lower sales, or cut the prices they charge for their exports. In either case, U.S. exporters’ revenue will decline. Foreign firms that export to the United States will be in the opposite situation: The dollar prices of their exports will decline, increasing their sales.

We can conclude that the article’s headline is somewhat misleading because not all groups in the United States are helped by a strong dollar and not all groups in other countries are hurt by a strong dollar.

Step 4: Answer part c. by explaining why higher interest rates in the United States relative to interest rates in other countries will increase the exchange value of the dollar. If interest rates in the United States rise relative to interest rates in other countries—as was true during the period from the spring of 2021 to the fall of 2022—U.S. financial assets, such as U.S. Treasury bills, will be more desirable, causing investors to increase their demand for the dollars they need to buy U.S. financial assets. The resulting shift to the right in the demand curve for dollars will cause the equilibrium exchange rate between the dollar and other currencies to increase.

Source: Patricia Cohen, “The Dollar Is Strong. That Is Good for the U.S. but Bad for the World,” New York Times, September 26, 2022.

Interest Rates, the Yen, the Dollar, and the International Financial System

From early March to early May 2022, the Japanese yen persistently lost value versus the U.S. dollar. Between March 1 and May 9, the yen declined by 14% against the dollar, which is a substantial loss in value during such a short time period. What explains the decline in the exchange rate between the yen and the dollar during that time? In Macroeconomics, Chapter 18, Section 18.2 (Economics, Chapter 28, Section 28.2), we saw that the exchange rate between most pairs of currencies fluctuates in response to these factors:

The foreign demand for U.S. goods
U.S. interest rates relative to foreign interest rates
Foreign demand for making direct investments or portfolio investments in the United States
The U.S. demand for foreign goods
Foreign interest rates relative to U.S interest rates
U.S. demand for making direct investments or portfolio investments in other countries

The following figure shows movements in the exchange rate between the yen and the U.S. dollar since 2010. During different periods, the factor that is most important in explaining fluctuations in an exchange rate varies. (Important note: The figure follows the convention of expressing the exchange between the yen and dollar in terms of yen per dollar. Therefore, in the figure, an increase in the exchange rate corresponds to a decrease in the value of the yen versus the dollar because it takes more yen to buy one dollar.)

From early March to early May 2022, the decline in value of the yen versus the dollar was mainly the result of U.S. interest rates increasing relative to Japanese interest rates. As the inflation rate increased rapidly in the spring of 2022, both short-term and long-term interest rates in the United States increased, partly in response to policy actions taken by the Federal Reserve. The Federal Reserve was attempting to increase interest rates in order to raise borrowing costs for households and firms, thereby slowing spending and inflation. Japan was experiencing much lower rates of inflation—well below the Bank of Japan’s 2% annual inflation target—so the BOJ was reluctant to increase interest rates. As a consequence, the gap between the interest rate on 10-year U.S. Treasury notes and the interest rate on 10-year Japanese government bonds had risen to 2.9 percentage points.

Higher U.S. interest rates caused a shift to the right in the demand for dollars in exchange for yen as foreign investors exchanged their yen for dollars in order to buy U.S. Treasury securities and other U.S. financial assets. As we show in Chapter 18, Figure 18.13, an increase in the demand for dollars (holding all other factors constant) increases the equilibrium exchange rate between the yen and the dollar.

What effect does a stronger dollar and a weaker yen have on the two countries’ economies? A weaker yen means that the yen price of imports from the United States will be higher. The higher prices will increase the Japanese inflation rate, but with inflation being low in in the spring of 2022, Japanese policymakers weren’t concerned by this effect. And because the value of U.S. imports is small relative to the size of the Japanese economy, the effect on the inflation rate wouldn’t be large in any case. The dollar price of Japanese exports to the United States will be lower, which should help Japanese firms exporting to the United States.

The effect on the U.S. economy will be the mirror image of the effect on the Japanese economy. The dollar price of Japanese imports being lower will help reduce the U.S. inflation rate, but not to a great extent because the value of Japanese imports is small relative to the size of the U.S. economy. The yen price of U.S. exports to Japan will be higher, which will be bad news for U.S. firms exporting to Japan.

Finally, many banks, other financial firms, and non-financial firms borrow money in dollars. They do so because over time the advantages of borrowing dollars has increased, even for foreign firms that receive most of their revenue in their domestic currency rather than dollars. In particular, the value of the dollar is relatively stable compared with the value of many other currencies. In addition, the Federal Reserve has made available short-term dollar loans to foreign central banks that allow those banks to provide short-term loans to local firms that are having temporary difficulty making dollar payments on their loans. By late 2021, the total amount of dollar loans made outside of the United States had risen to more than $13 trillion. In the spring of 2022, the value of the dollar was rising not just against the Japanese yen but also against many other currencies. The increase was bad news for foreign firms borrowing in U.S. dollars because it would take more of their domestic currency to buy the dollars necessary to make their loans payments. A large and prolonged increase in the value of the U.S. dollar could possibly upset the stability of the international financial system.

Sources: Yuko Takeo and Komaki Ito, “Japan’s Stepped-Up Warnings Fail to Stem Yen’s Slide Past 128,” bloomberg.com, April 19, 2022; Jacky Wong, “Japan Gets a Taste of the Wrong Type of Inflation,” Wall Street Journal, April 1, 2022; Megumi Fujikawa, “Yen Hits Lowest Level Since 2015, and Japan, U.S. Are OK With That,” Wall Street Journal, March 28, 2022; Bank for International Settlements, “BIS International Banking Statistics and Global Liquidity Indicators at End-September 2021,” January 28, 2022; and Federal Reserve Bank of St. Louis.

The U.S. Dollar in the World Economy

The U.S. dollar is the most important currency in the world economy. The funds that governments and central banks hold to carry out international transactions are called their official foreign exchange reserves. (See Macroeconomics, Chapter 18, Section 18.1 and Economics, Chapter 28, Section 28.1.) There are 180 national currencies in the world and foreign exchange reserves can be held in any of them. In practice, international transactions are conducted in only a few currencies. Because the U.S. dollar is used most frequently in international transactions, the majority of foreign exchange reserves are held in U.S. dollars. The following figure shows the composition of official foreign exchange reserves by currency as of mid-2021.

Over time, the percentage of foreign exchange reserves in U.S. dollars has been gradually declining, although the dollar seems likely to remain the dominant foreign reserve currency for a considerable period. Does the United States gain an advantage from being the most important foreign reserve currency? Economists and policymakers are divided in their views. At the most basic level, dollars are claims on U.S. goods and services and U.S. financial assets. When foreign governments, banks, corporations, and investors hold U.S. dollars rather than spending them, they are, in effect, providing the United States with interest-free loans. U.S. households and firms also benefit from often being able to use U.S. currency around the world when buying and selling goods and services and when borrowing, rather than first having to exchange dollars for other currencies.

But there are also disadvantages to the dollar being the dominant reserve currency. Because the dollar plays this role, the demand for the dollar is higher than it would otherwise be, which increases the exchange rate between the dollar and other currencies. If the dollar lost its status as the key foreign reserve currency, the exchange rate might decline by as much as 30 percent. A decline in the value of the dollar by that much would substantially increase exports of U.S. goods. Barry Eichengreen of the University of California, Berkeley, has noted that the result might be “a shift in the composition of what America exports from Treasury [bonds and other financial securities] … toward John Deere earthmoving equipment, Boeing Dreamliners, and—who knows—maybe even motor vehicles and parts.”

As shown in the following figure, the importance of the U.S. dollar in the world economy is also indicated by the sharp increase in the demand for dollars and, therefore, in the exchange rate during the financial crisis in the fall of 2008 and during the spread of Covid-19 in the spring of 2020. (The exchange rate in the figure is a weighted average of the exchange rates between the dollar and the currencies of the major trading partners of the United States.) As an article in the Economist put it: “Last March, when suddenly the priority was to have cash, the cash that people wanted was dollars.”

Sources: International Monetary Fund, “Currency Composition of Official Foreign Exchange Reserves,” data.imf.org; Alina Iancu, Neil Meads, Martin Mühleisen, and Yiqun Wu, “Glaciers of Global Finance: The Currency Composition of Central Banks’ Reserve Holdings,” blogs.imf.org, December 16, 2020; Barry Eichengreen, Exorbitant Privilege: The Rise and Fall of the Dollar and the Future of the International Monetary System, New York: Oxford University Press, 2001, p. 173; “How America’s Blockbuster Stimulus Affects the Dollar,” economist.com, March 13, 2021; and Federal Reserve Bank of St. Louis.

Solved Problem: The Macroeconomic Effects of a Stronger Euro

Supports: Economics: Chapter 28 – Macroeconomics in an Open Economy (Section 28.2); Macroeconomics: Chapter 12, Section 12.2; and Essentials: Chapter 19 – Comparative Advantage, International Trade, and Exchange Rates (Section 19.6)

Solved Problem: The Macroeconomic Effects of a Stronger Euro

In December 2020, an article in the Wall Street Journal discussed the effects of changes in the value of the euro in exchange for the U.S. dollar. The article noted that: “A stronger euro makes exports from the region less competitive overseas” and that a stronger euro would also “damp inflation” in countries using the euro as their currency.

a. What does the article mean by a “stronger euro”? Why would a stronger euro make European exports less competitive?

b. What does the article mean by “damp inflation”? Why would a stronger euro damp inflation in countries using the euro?

Source: Caitlin Ostroff, “Euro Rally Weighs on Inflation, Sapping Appetite for Stocks,” Wall Street Journal, December 9, 2020.

Solving the Problem

Step 1: Review the chapter material. This problem is about the effect of changes in the exchange rate on a country’s (or region’s) imports and exports, so you may want to review Chapter 28, Section 28.2 “How Movements in Exchange Rates Affect Imports and Exports.”

Step 2: Answer part a. by explaining what a “stronger euro” means and why a stronger euro would make European exports less competitive. A stronger euro is one that exchanges for more dollars or, which amounts to the same thing, requires fewer euros to exchange for a dollar. (You may want to review the Apply the Concept “Is a Strong Currency Good for a Country?”) A stronger euro results in U.S. consumers having to pay more dollars to buy goods and services imported from Europe. In other words, the prices of European exports to the United States will rise making the exports less competitive with U.S.-produced goods or with other countries exports to the United States. If the euro is also becoming stronger against currencies such as the British pound, Japanese yen, and Chinese yuan, then European exports will also be less competitive in those countries.

Step 3: Answer part b. by explaining what “damp inflation” means and why a stronger euro would damp inflation in countries using the euro. To “damp inflation” is to reduce inflation. So the article is stating that a stronger euro will result in lower inflation in Europe. To understand why, remember that while a stronger euro will raise the dollar price of European exports to the United States, it will reduce the euro price of European imports from the United States (and from other countries if the euro is also becoming stronger against currencies such as the British pound, Japanese yen, and Chinese yuan). Inflation in a country is measured using the prices of goods and services that consumers purchase, whether those goods and services are produced domestically or are imported.