> ## Content Index > Fetch the complete content index at: https://stablecoininsider.org/llms.txt > Use this file to discover other available public pages before exploring further. # Are Algorithmic Stablecoins Still Used in 2026? Data - URL: https://stablecoininsider.org/algorithmic-stablecoins/ - Published: 2025-11-08T09:20:41.000Z - Updated: 2026-09-28T08:58:14.000Z - Description: Dive into algorithmic stablecoins' 2025 resurgence: Post-Terra hybrids boast 98.5% stability, AI safeguards, and DeFi. Uncover regulations, risks, and why they're crypto's resilient underdogs. - Author: Alexandra - Tags: Analysis, algorithmic stablecoins, Stablecoins, Stablecoin News Algorithmic stablecoins try to hold a $1 price through smart-contract rules that expand or shrink supply, instead of holding a full reserve of cash, Treasuries or crypto collateral. The idea promised a stablecoin that was decentralized and capital efficient at the same time. This update looks at what the category actually looks like in 2026, using live supply data rather than projections. For background on the wider market, see [what is a stablecoin](https://stablecoininsider.org/what-is-a-stablecoin/). The turning point was TerraUSD (UST). Its supply peaked at about $18.77B on May 7, 2022, before it lost its peg and collapsed to zero within weeks ([DefiLlama](https://defillama.com/stablecoin/terraclassicusd)). The wider Terra collapse wiped out about $40B, and on December 11, 2025 Terraform co-founder Do Kwon was sentenced to 15 years in US prison for misleading investors ([AP News](https://apnews.com/article/do-kwon-terraform-court-montenegro-crypto-king-0df8b30b5f3cff2954f0a08bf0a327f3)). ### Key Takeaways: - Tokens DefiLlama classifies as algorithmic totaled only about $270M on September 28, 2026, under 0.1% of the roughly $311.4B USD stablecoin market ([DefiLlama](https://defillama.com/stablecoins)). - The largest, legacy FRAX, had about $151.4M in circulation and traded near $0.993 ([DefiLlama](https://defillama.com/stablecoin/frax)). - Frax itself moved to full collateral: after FIP188 it targets at least a 100% collateral ratio ([Frax docs](https://docs.frax.finance/frax-v3/overview)). - Several past algorithmic designs have failed outright, including USDN at about $0.016 and USDR at about $0.44 ([DefiLlama](https://defillama.com/stablecoin/neutrino-usd)). - The GENIUS Act requires permitted payment stablecoins to hold at least 1:1 reserves in cash-like assets, which a purely algorithmic token cannot meet ([Public Law 119-27](https://www.govinfo.gov/content/pkg/PLAW-119publ27/html/PLAW-119publ27.htm)). [Stablecoin Newsletter](https://stablecoininsider.org/the-stablecoin-insider-weekly-newsletter/) [![Algorithmic Stablecoins](https://storage.ghost.io/c/73/6a/736af0e4-2274-4543-a329-2952b2b52abc/content/images/2025/11/image-52.png)](https://stablecoininsider.org/) ## The Algorithmic Stablecoin Market in 2026 DefiLlama tags every tracked stablecoin by peg mechanism. On September 28, 2026, fiat-backed tokens accounted for about $287.0B, crypto-backed tokens about $27.3B and algorithmic tokens only about $270M across all currencies ([DefiLlama](https://defillama.com/stablecoins)). Total USD-pegged supply was about $311.4B, down from about $318.0B on May 1, 2026 but up from $241.3B a year earlier ([DefiLlama](https://defillama.com/stablecoins)). In other words, the category that briefly looked like a rival to USDT and USDC in early 2022 is now a rounding error. Most of the remaining supply sits in a few long-running projects, and several of the tokens still listed trade well below $1. ### Largest algorithmic stablecoins by supply Supply and price on September 28, 2026, according to [DefiLlama](https://defillama.com/stablecoins): | Token | Supply | Price | Status | | -------------------------------------------------------------------- | ------- | ------------------------------------------------------- | ---------------------------- | | [FRAX (legacy)](https://defillama.com/stablecoin/frax) | $151.4M | [$0.993](https://defillama.com/stablecoin/frax) | Now targets 100%+ collateral | | BEAN | $33.4M | n/a | Credit-based design | | [USDR](https://defillama.com/stablecoin/real-usd) | $19.3M | [$0.436](https://defillama.com/stablecoin/real-usd) | Depegged | | [Mento Dollar (USDm)](https://defillama.com/stablecoin/mento-dollar) | $16.7M | [$1.003](https://defillama.com/stablecoin/mento-dollar) | Backed by Mento Reserve | | [alUSD](https://defillama.com/stablecoin/alchemix-usd) | $9.9M | [$0.950](https://defillama.com/stablecoin/alchemix-usd) | Below peg | | [USDN](https://defillama.com/stablecoin/neutrino-usd) | $6.5M | [$0.016](https://defillama.com/stablecoin/neutrino-usd) | Failed | Two details stand out. First, the healthiest names on the list are the ones that have added real collateral. Second, a token staying "listed" is not the same as working: USDN and USDR still show supply, but holders cannot get anything close to $1 for them ([DefiLlama](https://defillama.com/stablecoin/real-usd)). --- ## How the Surviving Designs Changed The projects that survived the post-Terra period did so by moving toward collateral, not away from it. ### Frax: from fractional to fully collateralized Frax launched as a fractional-algorithmic stablecoin, partly backed by collateral and partly by its governance token. In its V3 design, after the FIP188 governance vote, the protocol attempts to keep FRAX at a minimum 100% collateral ratio using AMO contracts and approved real-world assets, and the peg tracks USD through Chainlink oracles and governance-approved reference rates ([Frax docs](https://docs.frax.finance/frax-v3/overview)). Frax now also issues frxUSD, which DefiLlama classifies as fiat-backed, with about $101.6M in circulation on September 28, 2026 ([DefiLlama](https://defillama.com/stablecoin/frax-usd)). ### Mento: reserve-backed with algorithmic mechanics Mento, the stablecoin platform that grew out of Celo, still uses on-chain exchange mechanics, but its stablecoins are supported by the Mento Reserve, which the project describes as overcollateralized and verifiable on-chain in real time ([Mento](https://www.mento.org/)). Its Mento Dollar had about $16.7M in supply ([DefiLlama](https://defillama.com/stablecoin/mento-dollar)). ### Why pure seigniorage models failed Pure seigniorage or dual-token designs rely on a second token to absorb volatility: when the stablecoin trades below $1, users burn it to mint the volatile token, and vice versa. This works while demand for the volatile token holds up. When confidence breaks, the mechanism mints ever more of the volatile token, its price collapses, and the stablecoin loses its only backing. That is the pattern UST followed in May 2022 ([DefiLlama](https://defillama.com/stablecoin/terraclassicusd)). [Stablecoin News](https://stablecoininsider.org/) ## Regulatory Status in 2026 Regulators in the two largest markets have written rules that effectively exclude purely algorithmic stablecoins from the regulated payment category. For a wider comparison, see our guide to [stablecoin regulations worldwide](https://stablecoininsider.org/stablecoin-regulations/). ### United States: the GENIUS Act The GENIUS Act became law as Public Law 119-27 on July 18, 2025 ([congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/1582)). It requires a permitted payment stablecoin issuer to maintain identifiable reserves on at least a 1-to-1 basis in assets such as US currency, bank deposits, short-dated Treasury bills and certain repos and money market funds ([Public Law 119-27](https://www.govinfo.gov/content/pkg/PLAW-119publ27/html/PLAW-119publ27.htm)). The law also orders the Treasury, with the banking agencies, the SEC and the CFTC, to study non-payment stablecoins, including "endogenously collateralized" stablecoins, defined as tokens that rely solely on the value of another digital asset created by the same originator to hold their fixed price. The report was due within 365 days of enactment ([Public Law 119-27](https://www.govinfo.gov/content/pkg/PLAW-119publ27/html/PLAW-119publ27.htm)). That definition describes the UST and LUNA model almost exactly. ### European Union: MiCA Under MiCA, issuers of e-money tokens and asset-referenced tokens need authorization, must hold reserve assets and must give holders redemption rights. The transitional period for crypto-asset service providers ended on July 1, 2026 ([ESMA](https://www.esma.europa.eu/esmas-activities/digital-finance-and-innovation/markets-crypto-assets-regulation-mica)). A token that is stabilized only by an algorithm does not fit either stablecoin category, so it cannot be offered as a regulated stablecoin in the EU. [![Algorithmic Stablecoins](https://storage.ghost.io/c/73/6a/736af0e4-2274-4543-a329-2952b2b52abc/content/images/2025/11/image-53.png)](https://stablecoininsider.org/the-2025-stable-act/) ## Where Algorithmic Mechanisms Still Show Up Algorithmic ideas have not disappeared. They have moved inside collateralized designs: - Automated market operations: Frax uses AMO contracts to deploy collateral and manage the peg rather than to replace collateral ([Frax docs](https://docs.frax.finance/frax-v3/overview)). - Crypto-backed stablecoins: DAI, with about $4.82B in supply, is overcollateralized by crypto but uses automated rules for rates and liquidations ([DefiLlama](https://defillama.com/stablecoin/dai)). - Synthetic dollars: Ethena’s USDe, about $4.95B in supply, uses hedged crypto positions and is classified by DefiLlama as crypto-backed, not algorithmic ([DefiLlama](https://defillama.com/stablecoin/ethena-usde)). This is the practical answer to the question in the title: the algorithms are still in use, but almost never as the only thing holding the peg. --- ## Risks to Understand - Reflexivity: if the stabilizing asset is issued by the same project, a loss of confidence can hit both tokens at once. - Oracle dependence: supply and collateral rules rely on accurate price feeds. - Liquidity: thin markets can turn a small depeg into a spiral. - Governance: parameter changes can lag a fast-moving market. - Regulatory exclusion: in the US and EU, these tokens cannot be marketed as regulated payment stablecoins. [![Algorithmic Stablecoins](https://storage.ghost.io/c/73/6a/736af0e4-2274-4543-a329-2952b2b52abc/content/images/2025/11/image-54.png)](https://aave.com/) ## Algorithmic vs Other Stablecoin Types - Fiat-backed (USDT, USDC): hold cash and Treasuries, dominate supply at about $287.0B across all currencies ([DefiLlama](https://defillama.com/stablecoins)), and can freeze addresses. - Crypto-backed (DAI, USDe and others): about $27.3B, more decentralized but exposed to crypto price swings ([DefiLlama](https://defillama.com/stablecoins)). - Algorithmic: about $270M, most decentralized in theory, weakest track record in practice ([DefiLlama](https://defillama.com/stablecoins)). ## Outlook Nothing in current data suggests a comeback for pure algorithmic stablecoins. The US and EU rules favor reserve-backed tokens, the category has shrunk to under 0.1% of stablecoin supply, and the most successful former algorithmic project has converted to full collateral. The most likely future is the one already visible: algorithmic tools used for rates, liquidations and peg management inside collateralized systems. [![Algorithmic Stablecoins](https://storage.ghost.io/c/73/6a/736af0e4-2274-4543-a329-2952b2b52abc/content/images/2025/11/image-55.png)](https://www.circle.com/usdc) ## Conclusion Algorithmic stablecoins are still technically in use in 2026, but only at the margins. About $270M of supply remains in tokens DefiLlama tags as algorithmic ([DefiLlama](https://defillama.com/stablecoins)), and several of those trade far below $1\. Anyone holding them should treat them as experimental, check live price and supply data before using them, and prefer designs with verifiable collateral. [Work With Us](https://form.typeform.com/to/c5cdIHp0?typeform-source=www.stablecoininsider.com) **Read Next:** - [**Aave Horizon Complete Breakdown for 2025: How to Borrow Stablecoins Against Tokenized RWAs**](https://stablecoininsider.org/aave-horizon-complete-breakdown-2025/) - [**Your Guide to Earning Stablecoin Yield**](https://stablecoininsider.org/11-best-stablecoin-yield-strategies-in-2026/) - [**The 2025 STABLE Act: Complete Breakdown of America's New Stablecoin Regulation**](https://stablecoininsider.org/the-2025-stable-act/) - [**OpenOcean Cross-Chain Aggregator: Complete Breakdown for 2025**](https://stablecoininsider.org/openocean-cross-chain-aggregator/) - [**The Best Stablecoin Bridges in 2025: Safety Ratings and More**](https://stablecoininsider.org/best-crypto-cross-chain-bridges-in-2026/) --- ## FAQs: ### 1\. What are algorithmic stablecoins and how do they work? They are tokens that aim for a fixed price, usually one US dollar, by using code to expand supply when the price is above target and contract it when the price is below, instead of relying on full collateral. ### 2\. Are algorithmic stablecoins still used in 2026? Only on a small scale. Tokens classified as algorithmic totaled about $270M on September 28, 2026, versus about $311.4B for all USD stablecoins ([DefiLlama](https://defillama.com/stablecoins)). ### 3\. What happened to Frax? Frax moved from a fractional-algorithmic model to targeting at least 100% collateralization after FIP188 ([Frax docs](https://docs.frax.finance/frax-v3/overview)), and it now also issues the fiat-backed frxUSD. ### 4\. How do regulators treat algorithmic stablecoins? The US GENIUS Act requires 1:1 reserves in cash-like assets for permitted payment stablecoins and orders a Treasury study of endogenously collateralized stablecoins ([Public Law 119-27](https://www.govinfo.gov/content/pkg/PLAW-119publ27/html/PLAW-119publ27.htm)). MiCA requires reserves and redemption rights for EU stablecoins ([ESMA](https://www.esma.europa.eu/esmas-activities/digital-finance-and-innovation/markets-crypto-assets-regulation-mica)). ### 5\. What is the difference between algorithmic and collateralized stablecoins? Collateralized stablecoins hold assets worth at least the tokens in circulation and let holders redeem them. Algorithmic stablecoins rely on supply rules and market incentives, which can fail when confidence breaks, as UST did in 2022.