History of the Japanese Yen: From Edo Money to the Modern JPY

Japan’s yen emerged from one of the most complex monetary transformations of the nineteenth century. Its history connects ancient copper coins, the gold and silver currencies of the Edo period, Mexican trade dollars, the Meiji government’s decimal reform, the creation of the Bank of Japan, the gold standard, wartime inflation, the post-war dollar peg and the modern floating exchange-rate system.

The yen is now one of the world’s most widely traded currencies, but it did not begin as a freely floating unit or as the product of a single reform. The monetary system introduced in 1871 was built to replace a fragmented collection of gold, silver, copper and paper currencies with a unified national unit suitable for taxation, modern banking and international trade.

This history also corrects several common misconceptions. The yen was not worth one US dollar in 1949; the official post-war rate was fixed at 360 yen per dollar. Japan did not move directly from the 1871 reform into a permanently functioning gold standard, and the modern yen was influenced by the wider silver-dollar economy of East Asia rather than being merely a copy of the Mexican peso.

Japanese Yen: Essential Facts

• Official currency: Japanese yen
• Japanese name: 円
• International currency code: JPY
• Currency symbol: ¥
• Common international spelling: Yen
• Basic unit: 1 yen
• Historical subdivisions: 1 yen = 100 sen = 1,000 rin
• Current issuing authority for banknotes: Bank of Japan
• Current circulating banknotes: ¥1,000, ¥2,000, ¥5,000 and ¥10,000
• Current circulating coins: ¥1, ¥5, ¥10, ¥50, ¥100 and ¥500
• Modern currency established: 1871
• Post-war fixed rate: ¥360 per US dollar from 1949
• Floating exchange-rate system: Adopted in 1973

Japanese Money in Eight Stages

1. Ancient coinage: Early state coins and imported Chinese copper money.
2. Commodity and imported money: Rice, cloth, gold dust and Chinese coins used when domestic minting declined.
3. Edo monetary system: Gold, silver and copper currencies circulating together at changing exchange rates.
4. Birth of the yen: The 1871 New Currency Act introduced yen, sen and rin.
5. Central banking and the gold standard: The Bank of Japan was created and a national banknote system developed.
6. War and post-war reconstruction: Inflation, the 1946 new-yen conversion and the 1949 dollar peg.
7. Floating yen: The breakdown of Bretton Woods, the 1973 float and the appreciation following the Plaza Accord.
8. Modern monetary era: New banknote series, unconventional monetary policy and a globally traded JPY.

What Does the Word Yen Mean?

The Japanese word written as 円 is commonly associated with the meanings “circle” or “round”. The older formal character was 圓. The modern simplified form is used in Japan today.

The exact reason the Meiji government selected the name is not documented beyond dispute. One explanation is that the new coinage was standardised in a circular form. Another connects the term to names used in China for Western round silver coins, including expressions translated as “silver yuan” or “foreign yuan”. These terms were familiar in the East Asian trading world before the Japanese currency reform.

The official international spelling is yen, not “en”, even though the modern Japanese pronunciation is close to “en”. Japanese government notes used the spelling YEN from the early Meiji period, and Bank of Japan notes have used it since the institution began issuing banknotes in 1885. Several explanations have been proposed for the additional letter Y, but no single origin has been conclusively established.

Money in Japan Before the Yen

The yen was introduced in the nineteenth century, but Japan’s monetary history extends much further into the past. Early exchange relied on commodities as well as coins, and the importance of money changed according to political authority, trade networks and the availability of metal.

Coins circulated in Japan before the eighth century, and the imperial government issued the Wado Kaichin in the early eighth century. These round coins with square central holes reflected the influence of Chinese coinage. A series of official coin issues followed, but domestic coin production declined as the political and economic structure changed.

From roughly the eleventh century, commodity money and payments in goods became more important. Rice, silk, cloth and other products could function as stores of value or means of settling obligations. From the medieval period, imported Chinese copper coins returned to widespread use as domestic commerce expanded.

The result was not a single national system in the modern sense. Different forms of value could coexist, and the money accepted in a transaction depended on region, market practice, political authority and the type of payment being made.

The Edo-Period Gold, Silver and Copper System

Under the Tokugawa shogunate, which ruled during the Edo period from the early seventeenth century, Japan developed a distinctive system based on gold, silver and copper money. The shogunate sought to organise coin production and bring major forms of currency under central control, but the system did not operate like a modern decimal currency.

Gold coins included the koban and other denominations calculated through units such as the ryo, bu and shu. Silver often circulated by weight rather than only through a fixed face value. Copper coins such as the Kan’ei Tsuho were used extensively for smaller transactions.

These monetary zones were linked through exchange markets. The rate between gold, silver and copper could change according to supply, demand, official recoinages and regional conditions. Merchants and money changers therefore played an important role in converting between different forms of currency.

The Edo economy also used paper instruments. Feudal domains, merchants, temples and other issuers produced local notes, commonly described as hansatsu when issued by domains. Their circulation depended on the credibility of the issuer and the territory in which they were accepted.

The system supported a large commercial economy, but it became increasingly difficult to reconcile with the standardised currencies and exchange practices of nineteenth-century international trade.

Foreign Trade, Mexican Silver and the Outflow of Japanese Gold

Japan’s reopening to international trade in the middle of the nineteenth century exposed a serious difference between domestic and international valuations of gold and silver. Gold was relatively cheaper in Japan than in many foreign markets. Foreign merchants could exchange silver for Japanese gold coins and then sell the gold abroad at a profit.

This process caused a substantial outflow of gold. The Tokugawa government responded with the Man’en recoinage of 1860, reducing the gold content of important coins and bringing the domestic gold-to-silver relationship closer to international conditions. The recoinage helped slow the outflow but also contributed to inflation and monetary disruption.

Mexican silver dollars were important in East Asian commerce during this period. They were widely recognised trade coins with a relatively dependable silver content. Japan’s new monetary authorities therefore operated within a regional commercial environment in which Mexican and other Western-style silver dollars were already familiar.

The influence of the Mexican peso should not be overstated. The yen was not simply a renamed Mexican coin. The Meiji government created a national decimal system with its own gold, silver and copper issues. However, the shape, weight conventions and international acceptance of silver trade dollars formed part of the environment in which the yen was designed.

The Meiji Restoration and the Need for a National Currency

The Meiji Restoration of 1868 replaced the Tokugawa shogunate with a new central government committed to building a modern state. Monetary reform was essential to that project.

The government inherited a confusing combination of Tokugawa gold, silver and copper coins, local domain notes, government paper money and regional exchange practices. It also needed a currency capable of supporting national taxation, modern public finance, industrial development, military expenditure and foreign trade.

During the first years of the new regime, older currencies continued to circulate while the government issued additional money. This transitional arrangement increased the urgency of creating a clear national unit and a modern minting system.

The New Currency Act of 1871 and the Birth of the Yen

In 1871, the Meiji government enacted the New Currency Act. The law introduced the yen as Japan’s basic national currency unit and replaced the traditional ryo, bu and shu system with a decimal structure.

• 1 yen: The principal unit.
• 1 sen: One hundredth of a yen.
• 1 rin: One tenth of a sen, or one thousandth of a yen.

The Act defined one yen in relation to 1.5 grams of gold and formally adopted a gold-based standard. It also authorised modern gold, silver and copper coins manufactured using Western minting technology.

In practice, the early system was more complicated than the formal law suggested. Japan lacked sufficient gold and silver reserves to make every government note fully convertible, while silver remained highly important in Asian trade. The government issued silver coins for foreign commerce, and those coins later circulated domestically as well.

The yen nevertheless achieved a crucial reform objective: it gave Japan a single national accounting unit. Prices, taxes, wages, bank accounts and government budgets could increasingly be expressed in a common decimal currency.

Early Meiji Banknotes and Inflation

The establishment of the yen did not immediately produce a unified and stable banknote system. The government issued yen-denominated notes, while licensed private institutions known as national banks were also permitted to issue banknotes.

Some early notes were intended to be convertible into specie, but shortages of precious metal and changes in banking rules weakened convertibility. By 1879, more than 150 national banks had been established, creating a large volume of notes from different issuers.

The Satsuma Rebellion of 1877 placed heavy financial demands on the government. Additional paper money was issued to meet wartime expenditure, contributing to inflation and a decline in the value of notes.

The experience demonstrated that a national currency required more than a legal unit called the yen. Japan also needed central control over banknote issuance and an institution capable of managing reserves, credit and monetary stability.

The Creation of the Bank of Japan

The Bank of Japan was established in 1882 and began operations on 10 October of that year. Its creation was part of a wider programme led by Finance Minister Matsukata Masayoshi to restore monetary stability, reduce the volume of depreciated paper money and centralise the banknote system.

The Bank became Japan’s central bank and eventually the sole issuer of Japanese banknotes. The Convertible Banknote Act was enacted in 1884, and the Bank of Japan issued its first banknote, a ten-yen note commonly associated with the figure of Daikokuten, in May 1885.

The earliest Bank of Japan notes were convertible into silver. This reflected the practical importance of silver in Japan’s reserves and trade. Government notes and banknotes issued by the national banks were gradually withdrawn, and their validity ended at the close of the nineteenth century.

The centralisation of issuance gave the yen a more coherent institutional foundation. Banknotes were no longer competing claims from many separate issuers but liabilities of a national central bank.

Japan’s Adoption of the Gold Standard in 1897

The 1871 reform formally referred to gold, but Japan’s monetary system did not operate as a fully established modern gold standard throughout the following decades. Silver remained central, and the first Bank of Japan notes were convertible into silver coins.

Japan adopted a formal gold standard under the Coinage Act of 1897. The new parity defined one yen as 0.75 grams of gold, half the gold weight established under the 1871 Act. The change reflected the worldwide rise in the value of gold relative to silver and the monetary conditions that had developed since the first Meiji reform.

Under the gold standard, Bank of Japan notes became convertible into gold, and Japan became more closely integrated with the monetary systems of the major Western economies. Fixed gold parities supported international payments and reduced exchange-rate uncertainty among countries operating under the system.

The gold standard also imposed constraints. The supply of money and the conduct of monetary policy were tied to gold reserves and international balance-of-payments conditions. The system could transmit financial pressure between countries and limit the ability of governments to respond independently to domestic crises.

World War I, Financial Crisis and the End of Gold Convertibility

The international gold standard was disrupted by World War I. Japan restricted gold exports during the conflict, effectively suspending the ordinary mechanism that connected the yen to gold.

The war initially created export growth and financial expansion, but the post-war period brought instability. Japan experienced banking stress and a major financial crisis in the 1920s. The Great Kanto Earthquake of 1923 also caused extensive physical and economic damage and complicated the settlement of financial claims.

Japan returned to the gold standard in 1930 at the pre-war parity. The decision proved difficult to sustain during the global depression. Falling prices, weak demand and pressure on reserves contributed to economic contraction.

In December 1931, Japan again prohibited gold exports and left the gold standard. The yen moved into a managed currency system in which its value was no longer directly convertible into a fixed quantity of gold.

The Yen During the 1930s and World War II

After leaving gold, the Japanese authorities gained greater freedom to expand money and credit. Fiscal spending, military expansion and the growing wartime economy placed increasing demands on the monetary system.

During World War II, the Bank of Japan operated under a legal framework that strongly reflected national wartime policy. Government finance and military expenditure contributed to a rapid expansion in the money supply.

Price controls and rationing obscured part of the inflationary pressure during the war, but the imbalance became increasingly visible after Japan’s defeat in 1945. Shortages, disrupted production and a large quantity of money in circulation contributed to severe post-war inflation.

The 1946 New-Yen Conversion

In February 1946, the Japanese government introduced emergency measures designed to restrain inflation. Existing banknotes were declared invalid after a limited transition, deposits were restricted and new banknotes were introduced. The programme became known as the new-yen conversion.

Because there were not enough new notes immediately available, some old banknotes were temporarily revalidated with official stickers. The measures attempted to immobilise part of the money supply and prevent unrestricted withdrawals.

The conversion did not create the modern yen as a new unit and it was not a redenomination comparable to replacing 1,000 old units with one new unit. The yen remained the currency unit. The reform changed which notes could circulate and imposed restrictions intended to control liquidity.

Inflation later resumed because reconstruction and public expenditure continued to be financed partly through monetary expansion. Greater stability was achieved only with broader fiscal and monetary measures at the end of the 1940s.

The 1949 Dollar Peg: 360 Yen to One US Dollar

In April 1949, the occupation authorities established a single exchange rate of 360 yen per US dollar. This corrected one of the most serious errors in many older summaries of the yen’s history: the yen was not equal to one US dollar in 1949.

The 360 rate became part of the Bretton Woods fixed exchange-rate system. It provided a stable basis for foreign trade and accounting during Japan’s post-war reconstruction and high-growth period.

The rate remained in effect for more than two decades. During that time, Japan developed into a major industrial and exporting economy. The fixed rate reduced exchange uncertainty, although it also became increasingly difficult to maintain as Japan’s productivity, trade balance and foreign reserves strengthened.

The End of the Fixed Rate and the Smithsonian Agreement

In August 1971, the United States suspended the dollar’s convertibility into gold. The decision, commonly associated with the Nixon shock, destabilised the Bretton Woods system and made the old ¥360 rate unsustainable.

Japan temporarily allowed the yen to move before participating in the Smithsonian Agreement later in 1971. Under the new arrangement, the official rate was revalued to 308 yen per US dollar.

The Smithsonian system did not resolve the underlying pressures. Differences in inflation, trade balances and capital flows continued to place major currencies under strain.

The Yen Becomes a Floating Currency in 1973

Japan moved to a floating exchange-rate system in 1973. From that point, the value of the yen was no longer permanently fixed at a single official dollar rate.

A floating currency does not mean that the government and central bank never influence the market. Japanese authorities may conduct foreign-exchange intervention or use monetary and economic policy in ways that affect the yen. The defining change was that no permanent parity such as ¥360 or ¥308 per dollar had to be defended indefinitely.

The yen’s market value became increasingly sensitive to Japan’s trade balance, interest-rate differences, inflation expectations, capital movements, energy prices and changes in global risk sentiment.

The Oil Shocks and the Internationalisation of the Yen

The oil shocks of the 1970s created major challenges for Japan, which depended heavily on imported energy. Higher oil prices affected inflation, trade and the exchange rate.

At the same time, Japan’s growing role in world trade increased international interest in the yen. Financial-market reforms gradually expanded the use of yen-denominated deposits, loans and bonds outside Japan.

The yen became more important as an international financing and reserve currency, although it did not displace the US dollar as the central currency of global trade and finance.

The Plaza Accord and the Yen’s Sharp Appreciation

In September 1985, Japan joined the United States, West Germany, France and the United Kingdom in the Plaza Accord. The participating governments agreed that the US dollar was overvalued and supported action intended to encourage an adjustment in exchange rates.

The yen appreciated sharply against the dollar after the agreement. A stronger yen reduced the domestic price of imports but placed pressure on Japanese exporters whose costs were largely denominated in yen and whose overseas sales were priced in foreign currencies.

Japanese companies responded through automation, overseas production and changes in sourcing. Monetary easing introduced partly in response to the stronger yen also formed part of the economic environment in which asset prices rose dramatically during the second half of the 1980s.

The Asset Bubble, Deflation and Unconventional Monetary Policy

Japan’s stock and property bubbles collapsed at the beginning of the 1990s. The following years brought weak growth, banking problems and persistent downward pressure on prices.

The Bank of Japan introduced a zero interest-rate policy in 1999. In 2001, it adopted quantitative easing and shifted its operating target from the overnight interest rate to the balance of current accounts held at the central bank.

Additional forms of monetary easing followed. Comprehensive monetary easing began in 2010, and quantitative and qualitative monetary easing was introduced in 2013. The Bank expanded purchases of government bonds and other assets.

In 2016, the Bank introduced a negative interest rate on part of the balances held by financial institutions and later adopted yield curve control. These policies affected domestic interest rates, capital flows and the foreign-exchange value of the yen.

In March 2024, the Bank changed its monetary policy framework and returned to guiding a short-term interest rate as its primary policy tool. This marked the end of the negative-rate and yield-curve-control framework, although the longer history of large central-bank asset holdings continued to shape financial conditions.

Why the Yen Is Sometimes Considered a Safe-Haven Currency

The yen has often strengthened during periods of global financial stress, leading market participants to describe it as a safe-haven currency. This behaviour is not guaranteed and does not mean that Japan is unaffected by crises.

Several explanations are commonly discussed. Japan has historically held a large net international investment position, Japanese investors own substantial overseas assets and periods of market stress may cause funds to be repatriated or leveraged positions funded in yen to be closed.

The yen has also been widely used as a funding currency when Japanese interest rates were lower than rates in other economies. Investors could borrow in yen and purchase higher-yielding assets elsewhere, a strategy known as a carry trade. When risk appetite falls, the reversal of these positions can create demand for yen.

Exchange-rate behaviour changes over time, however, and interest-rate differences, energy import costs and monetary-policy expectations can outweigh traditional safe-haven patterns.

Sen and Rin: Are They Still Japanese Currency?

The 1871 system divided the yen into 100 sen and 1,000 rin. Physical money denominated below one yen became increasingly impractical as prices rose.

A 1953 law stopped the issuance of currency worth less than one yen. Previously issued sub-yen coins and banknotes lost legal-tender status at the end of that year.

Sen and rin therefore cannot be used as circulating cash today. They still exist as calculation units in Japanese law, and fractions of a yen may appear in contexts such as interest calculations or foreign-exchange quotations.

Modern Japanese Coins

Japan currently issues six regular circulating coin denominations:

• ¥1 coin: Aluminium, first issued in its current type in 1955.
• ¥5 coin: Brass, with a central hole; the current type dates from 1959.
• ¥10 coin: Bronze, featuring Byodoin Phoenix Hall; the current plain-edge type dates from 1959.
• ¥50 coin: Cupronickel, with a central hole; the current type dates from 1967.
• ¥100 coin: Cupronickel, featuring cherry blossoms; the current type dates from 1967.
• ¥500 coin: A bicolour clad coin first issued in 2021 with advanced anti-counterfeiting features.

The ¥5 and ¥50 coins are immediately recognisable because of their central holes. The ¥5 coin is also unusual because its denomination is written only in Japanese characters rather than Western numerals.

Japan also issues commemorative coins in a range of denominations and metals. These are legal currency, although their unusual size, material or collector value may make them inconvenient for ordinary retail payments.

Modern Japanese Banknotes

Bank of Japan notes currently issued include four denominations:

• ¥1,000 note: The 2024 series features physician and bacteriologist Kitasato Shibasaburo and Hokusai’s Great Wave.
• ¥2,000 note: First issued in 2000, featuring Shureimon Gate and imagery associated with The Tale of Genji.
• ¥5,000 note: The 2024 series features educator Tsuda Umeko and Japanese wisteria flowers.
• ¥10,000 note: The 2024 series features industrialist Shibusawa Eiichi and the Marunouchi side of Tokyo Station.

The new ¥1,000, ¥5,000 and ¥10,000 notes entered circulation on 3 July 2024. They introduced updated anti-counterfeiting and accessibility features, including large denomination numerals and three-dimensional holographic portraits.

The ¥2,000 note remains valid and is still listed among currently issued Bank of Japan notes, although it is encountered less frequently than the other denominations in much of Japan.

Older banknotes do not automatically become invalid when a new series is introduced. Many earlier Bank of Japan notes remain legal tender. The Bank states that 25 types of banknotes are currently valid, including notes that are no longer being issued.

JPY, the Yen Symbol and International Use

The ISO 4217 code for the Japanese yen is JPY. Currency markets commonly quote the yen in pairs such as USD/JPY, EUR/JPY and GBP/JPY.

The symbol ¥ is also used for the Chinese yuan, so the surrounding context or the ISO code is important. In international finance, JPY provides the clearest identification of the Japanese currency.

Unlike currencies normally quoted as the amount of dollars per unit, USD/JPY is typically expressed as the number of yen required to purchase one US dollar. A rise in the USD/JPY number generally means that the yen has weakened against the dollar, while a fall generally means that the yen has strengthened.

The yen is used in international reserves, bond markets, cross-border lending and foreign-exchange trading. Its global role reflects the size of Japan’s economy and financial markets, although the dollar and euro have generally occupied larger positions in international payments and reserves.

Major Factors That Move the Yen

The exchange rate of the modern yen is influenced by several interacting forces:

• Interest-rate differences: Differences between Japanese rates and rates in the United States, Europe and other economies affect investment flows.
• Bank of Japan policy: Expectations about monetary tightening or easing can alter demand for yen-denominated assets.
• Trade and energy prices: Japan imports substantial quantities of energy, so oil and gas prices can affect its trade balance.
• Global risk sentiment: Financial stress can produce safe-haven demand or the reversal of yen-funded carry trades.
• Foreign-exchange intervention: Purchases or sales by the Japanese authorities can influence market conditions.
• Inflation expectations: Changes in expected inflation affect real interest rates and the perceived purchasing power of the currency.
• Economic growth: Relative growth prospects influence capital allocation and expectations for future policy.

No single factor explains every movement. The yen can weaken even when Japan records a trade surplus, or strengthen despite low domestic interest rates, because markets respond to expectations and international portfolio positions as well as current economic data.

Timeline of the Japanese Yen

1. Early eighth century: The imperial government issues Wado Kaichin coins.
2. Medieval period: Imported Chinese copper coins become widely used as commerce expands.
3. Seventeenth century: The Tokugawa shogunate organises a gold, silver and copper monetary system.
4. Edo period: Domain notes and other local paper currencies circulate alongside metal money.
5. 1850s: Japan reopens to international trade and experiences a major outflow of gold.
6. 1860: The Man’en recoinage reduces the gold content of important coins.
7. 1868: The Meiji government begins building a new national monetary system.
8. 1871: The New Currency Act introduces the yen, sen and rin.
9. 1872: The government begins issuing new yen-denominated paper money.
10. 1877: Financing of the Satsuma Rebellion contributes to inflation.
11. 1882: The Bank of Japan is established and begins operations.
12. 1885: The Bank of Japan issues its first banknote.
13. 1897: Japan formally adopts the gold standard under the Coinage Act.
14. 1930: Japan returns to the gold standard at the pre-war parity.
15. 1931: Gold exports are prohibited and Japan leaves the gold standard.
16. 1946: The new-yen conversion restricts old banknotes and deposits.
17. 1949: The official exchange rate is fixed at ¥360 per US dollar.
18. 1953: Currency below one yen loses legal-tender status.
19. 1971: The Nixon shock ends the old dollar-gold framework; the Smithsonian rate is set at ¥308 per dollar.
20. 1973: Japan moves to a floating exchange-rate system.
21. 1985: The Plaza Accord is followed by a major appreciation of the yen.
22. 1999: The Bank of Japan introduces a zero interest-rate policy.
23. 2000: The ¥2,000 banknote is issued.
24. 2001: The Bank introduces quantitative easing.
25. 2013: Quantitative and qualitative monetary easing begins.
26. 2016: Negative interest rates and later yield curve control are introduced.
27. 2021: A new bicolour ¥500 coin enters circulation.
28. 2024: New ¥1,000, ¥5,000 and ¥10,000 banknotes enter circulation, and the Bank of Japan changes its monetary policy framework.

Why the History of the Yen Matters

The history of the yen shows how a currency can be transformed by political unification, international trade, war, central banking and changes in the global monetary system.

The first recurring theme is standardisation. The Meiji government replaced a fragmented system of metal currencies and regional notes with one national unit, while the Bank of Japan later centralised banknote issuance.

The second is convertibility. The yen moved through formal gold definitions, practical silver convertibility, a mature gold standard, managed wartime money, a post-war dollar peg and finally a floating exchange rate.

The third is international influence. Mexican silver dollars, Western minting technology, the gold standard, Bretton Woods, the Smithsonian Agreement and the Plaza Accord all shaped the yen’s development.

The fourth is monetary policy. Japan’s experience ranges from specie-backed notes and fixed exchange rates to zero interest rates, quantitative easing, negative rates and large-scale central-bank asset purchases.

The yen is therefore more than a national unit of account. Its history records Japan’s transition from a decentralised early-modern economy to an industrial power and major participant in global finance.

Conclusion

The Japanese yen was officially created in 1871, but its origins lie in a much longer history of commodity money, imported Chinese coins, Tokugawa gold and silver, local paper notes and international trade dollars.

The New Currency Act established a decimal system of yen, sen and rin. The creation of the Bank of Japan gave the currency a central issuer, while the adoption and later abandonment of the gold standard reflected Japan’s changing relationship with the global monetary order.

After war and inflation, the yen was fixed at 360 per US dollar in 1949, revalued to 308 under the Smithsonian Agreement and allowed to float in 1973. It later became one of the world’s principal traded currencies and an important funding, reserve and investment unit.

Modern coins, the 2024 banknote series and changing Bank of Japan policies continue this history. The form of the currency has evolved from gold koban and silver trade coins to holographic banknotes and electronic balances, but the central objective remains the same: maintaining confidence in a unit that can support payments, savings, contracts and economic exchange.