What Are Stablecoins and How Do They Work?

What Are Stablecoins and How Do They Work?

Cryptocurrencies are often associated with large price swings. Bitcoin, Ethereum, and many other digital assets can move sharply in value, which can make them difficult to use as everyday units of payment.

Stablecoins were designed around a different objective.

A stablecoin is a crypto asset that aims to maintain a stable value relative to a reference asset, most commonly a national currency such as the U.S. dollar. Instead of relying entirely on market demand to determine its value, a stablecoin generally uses reserves, collateral, or another stabilization mechanism to keep its price close to a target. (IMF)

That gives stablecoins a distinctive role in digital finance. They can represent dollar- or euro-linked value on a blockchain while avoiding much of the price volatility associated with unbacked crypto assets.

But “stable” does not mean guaranteed.

A stablecoin’s ability to maintain its target value depends on how it is backed, how its reserves are managed, how redemption works, and whether users trust the issuer and the underlying system.

What Is a Stablecoin?

A stablecoin is a digital token designed to maintain a relatively stable value against a specified asset or reference value.

Most major stablecoins are denominated in U.S. dollars. A dollar stablecoin may therefore be designed to remain close to $1, allowing users to hold and transfer a dollar-linked digital asset on a blockchain.

The International Monetary Fund’s research on stablecoins describes them as crypto assets that seek to maintain a stable value relative to a specified asset, pool, or basket of assets. Their stabilization mechanisms can involve financial assets, commodities, other crypto assets, or, in some cases, programmed market mechanisms.

That creates an important difference between stablecoins and cryptocurrencies such as Bitcoin.

Bitcoin has its own market price and does not have an issuer promising to redeem each bitcoin for one U.S. dollar.

A fiat-backed stablecoin generally has a specific issuer that holds reserve assets and seeks to maintain a defined relationship between the token and its reference currency.

In simple terms, stablecoins combine:

• Blockchain-based transferability
• A mechanism designed to reduce price volatility
• A reference value, usually a national currency

That combination explains why stablecoins have become an important part of the crypto and digital-payments ecosystem.

How Do Stablecoins Work?

The easiest way to understand a stablecoin is to look at a dollar-backed model.

Suppose an issuer creates a stablecoin designed to maintain a value of $1.

The issuer needs a reserve structure that supports the tokens in circulation. If users purchase $1 million worth of newly issued stablecoins, the issuer may hold approximately $1 million in eligible reserve assets, depending on the stablecoin’s structure and applicable rules.

The tokens can then circulate between users on a blockchain.

A simplified process looks like this:

User provides funds → issuer receives funds → stablecoins are issued → tokens circulate → user redeems tokens → tokens are removed from circulation.

The last step is important.

When a user redeems stablecoins with the issuer, the issuer provides the relevant redemption value according to its terms and the redeemed tokens are generally removed from circulation. This process is often described as burning the tokens.

The relationship between issuance, reserves, and redemption is therefore central to the stablecoin model.

It also explains why a stablecoin is not simply “a cryptocurrency that happens to stay at $1.” The stability comes from a financial and operational structure supporting the token.

The IMF notes that most stablecoins are fiat-backed and that these stablecoins are generally intended to be supported by safe, liquid, short-term financial assets. (IMF)

Why Reserves Matter

Reserves are one of the most important parts of a fiat-backed stablecoin.

Depending on the issuer and regulatory framework, reserve assets can include cash, bank deposits, U.S. Treasury securities, and other short-term liquid instruments.

The purpose is to provide assets that can support redemptions and maintain confidence in the token.

This creates a simple economic relationship:

More stablecoins in circulation → more supporting assets required → greater importance of reserve quality and liquidity.

The quality of those assets matters because users may want to redeem their stablecoins quickly, including during periods of market stress.

The IMF’s 2026 research on making stablecoins stable emphasizes timely redemption and reserve backing with safe and highly liquid assets as important parts of stablecoin design. (IMF)

This is also where stablecoins differ from Bitcoin. Bitcoin does not depend on an issuer maintaining a reserve portfolio against every unit in circulation. A fiat-backed stablecoin does.

So while the token may move through decentralized blockchain infrastructure, the stability mechanism can depend heavily on a centralized issuer and its financial assets.

Main Types of Stablecoins

Stablecoins are not all structured in the same way. Their main differences come from what supports their value and how the system attempts to maintain the target price.

Fiat-Backed Stablecoins

Fiat-backed stablecoins are linked to traditional currencies such as the U.S. dollar or euro.

They are generally supported by reserves denominated in the relevant currency or by assets closely connected to it. This is the dominant model in the stablecoin market. (IMF eLibrary)

The basic idea is relatively straightforward: users hold a blockchain-based token while the issuer maintains reserve assets intended to support its value.

Crypto-Backed Stablecoins

Crypto-backed stablecoins use other cryptocurrencies as collateral.

Because crypto assets can be highly volatile, these systems may require more collateral than the value of the stablecoins issued.

For example, a system might require $150 worth of crypto collateral to support $100 worth of stablecoins. The additional collateral provides a buffer if the underlying crypto asset loses value.

The trade-off is greater complexity and exposure to movements in the crypto market.

Commodity-Backed Stablecoins

Some stablecoins are linked to commodities such as gold.

In this structure, the token’s reference value is connected to the underlying commodity rather than directly to a national currency.

This can allow users to hold and transfer a blockchain-based representation of commodity-linked value, although the precise rights and backing arrangements depend on the issuer.

Algorithmic Stablecoins

Algorithmic stablecoins attempt to maintain a target value through programmed rules, market operations, supply adjustments, or other mechanisms rather than relying primarily on conventional reserves.

This model is fundamentally different from a reserve-backed stablecoin.

It can also introduce additional risks because the stabilization mechanism itself may come under pressure when market confidence falls sharply.

The IMF identifies algorithmic arrangements as one category of stablecoin design while noting that fiat-backed stablecoins make up most of the market. (IMF)

What Does Blockchain Add?

The blockchain does not create the stablecoin’s value by itself.

Instead, it provides much of the infrastructure through which the token can be issued, recorded, transferred, and settled.

As explained in What Is Blockchain?, blockchain technology provides a distributed ledger for recording transactions. Stablecoins use that infrastructure to represent ownership and transfer tokens between blockchain addresses.

This can support features such as:

• 24/7 transferability
• Peer-to-peer transactions
• Programmable payments
• Integration with decentralized applications
• Blockchain-based settlement
• Transfers across geographic borders

The IMF describes public blockchains as common infrastructure for recording ownership and settling stablecoin transfers. (IMF)

The distinction is important:

The blockchain handles the digital transfer of the token. The issuer and stabilization mechanism support the token’s target value.

Those are related functions, but they are not the same thing.

What Are Stablecoins Used For?

Stablecoins first became deeply integrated into cryptocurrency markets, where they provide a relatively stable unit for trading and settlement.

Instead of converting crypto assets into traditional bank money every time they want to reduce exposure to market volatility, traders can move into a dollar-linked stablecoin.

The BIS reports that crypto trading remains the main practical use of stablecoins, while their use in real-economy payments remains much smaller than overall transaction volumes might suggest. (Bank for International Settlements)

Crypto Trading

Stablecoins are widely used as trading pairs on crypto platforms.

For example, a trader may exchange Bitcoin for a dollar-linked stablecoin rather than immediately converting the proceeds into a bank deposit.

This allows capital to remain within the digital-asset ecosystem while reducing exposure to movements in Bitcoin or other volatile assets.

Payments

Stablecoins can also be used to transfer value through blockchain networks.

Their potential advantage is that payment and settlement can occur using blockchain infrastructure rather than relying entirely on traditional payment rails.

Actual costs still depend on network fees, conversion costs, liquidity, exchange rates, and on- and off-ramp arrangements.

Cross-Border Transfers

A dollar-linked stablecoin can provide a digital dollar-like asset that moves across blockchain networks.

This has attracted attention for cross-border transfers and remittances, although stablecoin payment activity in the real economy remains much smaller than headline blockchain transaction volumes. (Bank for International Settlements)

Decentralized Finance

Stablecoins are also important within decentralized finance, or DeFi.

They can serve as trading pairs, collateral, settlement assets, and units of account within blockchain-based applications.

For a broader explanation of the technology behind these applications, see How Does Blockchain Work?.

Stablecoins vs. Bitcoin

Stablecoins and Bitcoin are both digital assets, but their economic designs are fundamentally different.

A stablecoin should therefore not be viewed simply as a “less volatile Bitcoin.”

Bitcoin’s market value does not depend on an issuer holding dollars or government securities against every coin. A fiat-backed stablecoin’s value is much more closely connected to its issuer, reserves, redemption arrangements, and stabilization mechanism.

For a separate comparison of major crypto networks, see Bitcoin vs Ethereum: What Is the Difference?.

Why Can a Stablecoin Lose Its Peg?

A stablecoin may be designed to remain at $1, but its market price can temporarily move above or below that level.

Several factors can cause a deviation.

Loss of Confidence

If users become concerned about an issuer’s reserves or ability to process redemptions, they may rush to sell or redeem the stablecoin.

Heavy selling can push the market price below its intended value.

Reserve Problems

The amount of reserves matters, but so does their quality.

An issuer could hold assets whose total value appears sufficient while still facing difficulty meeting rapid redemption requests if those assets are not sufficiently liquid.

The IMF’s 2026 work on stablecoin stability emphasizes the importance of reserve assets that can support timely redemption. (IMF)

Market Liquidity

Stablecoins trade across exchanges and blockchain markets. Differences in liquidity, trading activity, and market demand can therefore cause temporary deviations from the target price.

Arbitrage can help bring the market price back toward the intended value, but it does not eliminate the underlying risks.

Problems With the Stabilization Mechanism

Crypto-collateralized and algorithmic stablecoins face risks that differ from those of conventional reserve-backed models.

If collateral falls sharply or a stabilization mechanism fails to respond effectively, maintaining the target value can become difficult.

The key point is simple:

“Stable” describes the intended outcome, not a guarantee that the token will always trade at its target price.

Are Stablecoins Safe?

There is no single answer for every stablecoin.

Risk depends on the issuer, reserve structure, redemption rights, blockchain infrastructure, custody arrangements, governance, and applicable regulation.

For a reserve-backed stablecoin, several questions are particularly important:

• What assets back the tokens?
• Who controls those assets?
• How liquid are the reserves?
• Can users redeem directly with the issuer?
• What are the redemption conditions?
• How often are reserve holdings disclosed or reviewed?
• What happens during severe market stress?
• Which laws and regulators apply?

These questions matter because holding a stablecoin is not automatically equivalent to holding a bank deposit or physical U.S. dollar.

The BIS has highlighted liquidity and redemption risks associated with stablecoins, particularly when reserve assets have different liquidity characteristics from the tokens users expect to redeem. (Bank for International Settlements)

The exact risk profile therefore depends on the specific stablecoin rather than the category alone.

Stablecoins and Regulation

Stablecoin regulation has become a major area of financial policy because these assets sit between cryptocurrency markets and traditional financial infrastructure.

In the United States, the GENIUS Act created a federal framework for payment stablecoins. Implementation of that framework is now moving into the regulatory rulemaking stage.

On September 24, 2026, the Federal Reserve proposed rules covering Board-supervised payment stablecoin issuers under the GENIUS Act. The proposal addresses permissible reserve assets, capital requirements, risk-management standards, custody of reserve assets, and related banking activities. (Federal Reserve)

The Federal Reserve’s accompanying statement also emphasized the importance of reliable redemption at par, reserve-asset limitations, capital requirements, and clear redemption rights. (Federal Reserve)

The regulatory approach is not identical worldwide. Different jurisdictions have taken different positions on reserve requirements, permitted assets, foreign-currency-backed stablecoins, issuer licensing, and algorithmic models. (IMF eLibrary)

For users and businesses, that means the legal protections surrounding one stablecoin may differ substantially from those surrounding another.

Stablecoins and the Financial System

Stablecoins occupy an unusual position in finance.

They are crypto assets, but their value is often tied to traditional currencies. They operate on blockchain networks, but many depend on centralized issuers. Their transactions can be global, while their reserves may consist largely of traditional financial assets.

That combination gives stablecoins a bridge-like role between digital assets and conventional finance.

The scale of the market has also grown enough to attract attention from central banks and international financial institutions. The BIS reported stablecoin market capitalization of around $320 billion at the end of May 2026, while noting that most current use remains connected to crypto trading and that real-economy payment use is still relatively limited. (Bank for International Settlements)

The IMF similarly notes that stablecoins could affect payments, financial intermediation, and currency use, while creating risks related to financial stability, monetary policy, and currency substitution. (IMF)

That makes stablecoins relevant beyond the crypto industry. Their growth could influence how digital payments develop, how financial institutions compete, and how demand for dollar-denominated assets evolves.

Stablecoins Are More Than “Stable Crypto”

The easiest way to understand stablecoins is to stop thinking of them simply as cryptocurrencies with lower volatility.

Their defining feature is the relationship between the token, its reference value, and the mechanism designed to maintain that relationship.

For a reserve-backed stablecoin, that mechanism can involve an issuer, reserve assets, issuance, redemption, and market liquidity. The blockchain provides the infrastructure for transferring the token, but the blockchain itself does not guarantee the token’s value.

That distinction explains both the appeal and the risks.

Stablecoins can provide a relatively stable digital unit for crypto trading, blockchain applications, and potentially payments. At the same time, users still need to consider the issuer, reserves, redemption rights, technology, liquidity, and regulatory framework.

The current stablecoin market is therefore best understood as a developing part of digital finance rather than a replacement for traditional money.

As regulation develops and financial institutions explore blockchain-based payments, stablecoins may become more closely connected to conventional financial infrastructure. How significant that role becomes will depend not only on technology, but also on trust, regulation, liquidity, and whether stablecoins can provide reliable value transfer when markets are under pressure.