Commodity money

Commodity money is a medium of exchange that has intrinsic value because it is made of a valuable commodity, such as gold, silver, copper, salt, or even tobacco. Its value is derived from the material itself, not from any government decree. Key characteristics include durability, portability, divisibility, and uniformity, which make it suitable for trade. For example, gold is durable, easily divisible into coins, and portable, making it a widely used commodity money throughout history.¹

Unlike fiat money, which is backed by the trust and credit of the issuing government, commodity money's value is independent of any central authority. This means that its purchasing power is tied to the market value of the commodity, which can fluctuate based on supply and demand. Historically, many societies have used commodity money, from cowrie shells in Africa to salt in ancient Rome, where the word 'salary' derives from the Latin 'salarium' (salt money).

One of the earliest forms of commodity money was barley in ancient Mesopotamia, used as a standard of value and for payments. In China, cowrie shells were used as money as early as 1200 BCE, and later, bronze and copper coins were minted. The Lydians are credited with introducing the first official coinage in the 7th century BCE, made from electrum, a natural alloy of gold and silver.²

In the Americas, cacao beans served as currency among the Aztecs, and wampum (shell beads) was used by Native Americans and later by European colonists. In more recent history, the gold standard, which tied currency value to a specific amount of gold, was a form of commodity money system that prevailed globally until the 20th century. The Bretton Woods system, established in 1944, pegged the US dollar to gold, but this was abandoned in 1971, marking the end of the last major commodity-backed monetary system.³

While most modern economies use fiat money, commodity money still has relevance. Gold and silver are held by central banks as reserves, and investors buy precious metals as a hedge against inflation and currency devaluation. Some economists advocate for a return to a gold standard to limit government spending and inflation, but critics argue that it would restrict economic growth and make monetary policy inflexible.⁴

Cryptocurrencies like Bitcoin are sometimes compared to commodity money because they are scarce and not backed by any government, but they lack intrinsic value and are highly volatile. The debate over the merits of commodity money versus fiat money continues, with some arguing that commodity money provides more stability, while others point to the advantages of fiat money in managing economic crises.

Beyond the well-known examples, commodity money has taken many unusual forms. In Yap, a Micronesian island, large stone discs called Rai stones were used as money; their value was based on size and history, and they were often not physically moved but ownership was transferred verbally. In prison camps, cigarettes have served as a de facto currency due to their durability and divisibility.

Another niche example is the use of tea bricks in China and Siberia, which were compressed tea leaves that could be used as money and also consumed. In medieval Iceland, butter was used as a form of payment, and in some parts of Africa, manillas (horseshoe-shaped metal objects) were used as currency. These examples illustrate the adaptability of commodity money to local resources and needs.⁵

Fiat money

Currency that has no intrinsic value and is declared legal tender by a government.

Intrinsic value

The inherent worth of a commodity based on its material composition.

Gold standard

A monetary system where a country's currency value is directly linked to a specific amount of gold.