What is algorithmic stablecoin?

A stablecoin that tries to hold its price using supply rules or a paired token rather than holding reserves worth the tokens issued.

Designs of this kind failed publicly in 2022, and the European Union's MiCA framework now imposes reserve and authorization requirements that an unbacked design cannot meet (source: Regulation (EU) 2023/1114). The failure mode is well documented: once confidence goes, the mechanism that is meant to restore the peg mints more of the paired token into a falling market.

Some tokens described as algorithmic are actually collateralized, and some collateralized tokens use algorithmic components for rate setting. Read what actually backs it rather than what the marketing calls it. Where a design of this kind is still offered, treat the absence of a redeemable reserve as the main fact about it rather than a detail in the documentation.

How it works

A reserve-backed stablecoin promises redemption. You hand back one token and receive one unit of the reference currency from a pool of assets held for that purpose, so arbitrage has a hard floor to push against.

An algorithmic design replaces that promise with an incentive. The common construction pairs the stablecoin with a volatile governance token and lets anyone swap one for the other at the target price. When the stablecoin trades below target, arbitrageurs are meant to buy it cheaply, redeem it for a dollar's worth of the volatile token, and sell that, retiring supply and lifting the price.

The mechanism works while the volatile token has a market capitalization comfortably larger than the stablecoin supply. It inverts when it does not: minting more of the volatile token to honor redemptions increases its supply exactly when its price is falling, which lowers the value backing each remaining stablecoin and invites more redemptions.

Under Regulation (EU) 2023/1114, a token referencing an official currency must be an e-money token issued against reserves of at least equivalent value, with a redemption right at par. A design with no reserve has no route to authorization.

Example

Illustrative: a stablecoin has 1 billion units outstanding and its paired governance token has a $4 billion market value, so backing is four times supply. Confidence drops and the stablecoin trades at $0.95. Holders redeem 200 million units, minting $200 million of new governance tokens into the market. The governance token falls 40% to $2.4 billion, so remaining backing is now $2.4 billion against 800 million units. Each further redemption worsens the ratio. Numbers are illustrative but the direction is the documented failure pattern.

Why it matters when you buy

If you park value between trades, what matters is whether you can get it back at par under stress. A reserve-backed token gives you a redemption claim and a published reserve report; an algorithmic one gives you a mechanism that depends on other people's confidence. Check which category a token falls into before using it as a trading pair, and see the stablecoin yield risks guide.

Related terms

• stablecoin — the broader category and its variants
• fiat backed stablecoin — the reserve-backed alternative
• e money token — the EU category with a redemption right
• depeg — what happens when the target fails
• mica — the EU rules that gatekeep issuance
• over collateralization — the buffer algorithmic designs lack

Questions

How can I tell if a stablecoin is algorithmic?

Look for a redemption right against reserves. If the issuer's documentation describes swapping into another token it also issues, rather than into cash or short-dated government debt held by a custodian, the design is algorithmic in substance.

Are all algorithmic designs the same?

No. Some are partly collateralized and use an algorithmic layer only at the margin. The relevant question is what fraction of supply is covered by assets you could redeem against, not the label.

Can these be sold in the European Union?

An unbacked design cannot meet the reserve and authorization requirements of Regulation (EU) 2023/1114 for tokens referencing an official currency, which is why several were delisted from EU-facing venues.