What is fiat money?
Correct answer
Answer A: An official currency without fixed convertibility into gold.
Quick explanation
Fiat money does not get its monetary status from being redeemable for a fixed amount of a commodity. Its use depends, among other things, on the monetary system, the legal framework and broad acceptance.
Detailed explanation
Fiat money describes a monetary system in which the monetary unit cannot be redeemed for gold or another commodity at a fixed rate. A banknote's material value is therefore not the basis of its face value.
This does not mean fiat money is supported by nothing. Its use rests on laws, contracts, taxes, payment infrastructure, economic activity and the expectation that other people and institutions will accept the same unit. Central banks are meant to use their tools to contribute to currency stability.
Fiat money can take the form of cash or bank balances. Bank deposits are legally claims against commercial banks and are not identical to banknotes. Both, however, are denominated in the same currency and usually used at the same face value in everyday life.
A fiat system offers greater flexibility, for example in providing liquidity during crises. At the same time, it lacks an automatic quantity limit imposed by a commodity. Stability therefore depends more on credible rules, institutions and responsible policy. A lack of gold backing makes money neither automatically worthless nor automatically stable.
Example or everyday application
A 50-euro note cannot be exchanged for gold at a fixed rate. It is still accepted because prices, taxes and contracts are denominated in euros and the currency is widely usable.
Common misconception
Beginners often equate not being gold-backed with being worthless. The explanation shows the legal, economic and institutional foundations that actually support fiat money.
What the sources support
The ECB explains fiat money as money without a redemption claim on a commodity. The Bitcoin white paper describes a peer-to-peer system without a central clearing party; the sources document different architectures, not which money is “better”.