Frax Price Index (FPI)
Decentralized Stablecoin·Active·Global
First production CPI-tracking stablecoin where the redemption price grows per second on-chain based on the US CPI-U. Over-collateralized 100% by frxUSD backed by BlackRock BUIDL Treasury fund, with FPIS as the governance token.
M69 Score
Methodology →3.1
Partially aligned
Monetary Sovereignty
3.3
Civilizational Durability
2.9
Universal Adoption
2.7
Framework v0.2-alphaRated 1mo ago
M69 Verdict
Frax Price Index (FPI) is the first production stablecoin whose redemption price targets the US Consumer Price Index (CPI-U) rather than a single fiat unit. Launched within the Frax Finance ecosystem in late March / April 2022 by co-founders Sam Kazemian and Travis Moore, FPI's peg is computed on-chain from the BLS-reported 12-month CPI-U inflation rate delivered monthly by a specialized Chainlink oracle. Between the monthly oracle updates, the redemption price grows per second in the FPI system contract, so by April 2026 the target peg stands at approximately $1.14 (roughly 3.5-4% annualized drift from the December 2021 base of $1.00). Reported token metrics show a circulating supply around 84.7M FPI, an FDV near $96.7M, and a companion governance/seigniorage token FPIS with an FDV of ~$10.7M. Mechanically, FPI maintains a 100% collateral ratio at all times. It is minted/redeemed via the FPI Controller Pool against frxUSD (which after the January 2025 FIP-418 vote is backed primarily by BlackRock's BUIDL tokenized US-Treasury fund via Securitize). When the treasury's on-chain yield fails to keep up with CPI drift, the protocol can sell newly minted FPIS for FRAX/frxUSD via TWAMM to backfill the collateral gap; when yield exceeds CPI drift, excess flows to FPIS holders as seigniorage. Liquidity exists on Curve, Fraxswap and Uniswap V3, though 24-hour volumes are very thin (~$1,300 reported on CMC for April 2026). From an M69 alignment perspective, FPI is one of the most conceptually ambitious stablecoins ever deployed: targeting CPI-adjusted purchasing power is precisely the kind of spending-power-preserving design the M69 Manifesto envisions, and the redemption-price-grows-per-second mechanism is an elegant on-chain realization. Its issuance is debt-free, fully backed, and contraction works symmetrically through redemption. At the same time, it has significant structural gaps: the unit of account is ultimately CPI-adjusted USD (a state-issued index), collateral is now effectively US Treasury Bills via BUIDL (high fiat exposure), traction is extremely thin (FDV <$100M, daily volume near zero, no merchant acceptance), and the broader Frax team has announced a roadmap that phases out FPIS into FXS by 2028. FPI is the best-designed CPI stablecoin in production but remains a niche experiment rather than a widely adopted purchasing-power currency.
Key Findings
Strongest category: Spending Power Stability (4.1/5.0)
FPI is the first and only production stablecoin whose redemption price is algorithmically tied to a real-economy price index (US CPI-U) and updated per second on-chain. It explicitly targets long-term purchasing-power preservation (the precise SPS commandment) while using Controller Pool arbitrage and TWAMM pressure for short-term dampening. This is as close to a purpose-built purchasing-power stablecoin as currently exists in production.
Weakest category: Fiat Independence (2.1/5.0)
FPI's central paradox: it targets purchasing power rather than a nominal fiat unit (M69-aligned intent) but implements that through a US-specific CPI index delivered by a centralized BLS feed, with collateral now routed through BlackRock BUIDL (cash and US Treasuries). The goal is fiat-independent purchasing power; the pipes are almost entirely fiat-dependent.
Strong Issuance Model (3.6/5.0)
Debt-free, reserve-backed mint/redeem model with symmetric expansion and contraction, tied to a real-economy signal (CPI). Supply responds to user demand at a 100% collateral ratio and the oracle-driven peg-growth mechanism encodes economic activity directly into redemption value. This is a structurally clean issuance design, though not as radically elastic as Ampleforth's rebase.
Traction is very weak (2.3/5.0)
After four years in production, FPI reports an FDV under $100M, daily volume in the low thousands of dollars, no merchant acceptance, and no evidence of wages/contracts/prices being denominated in FPI. "Inflation hedging at the stablecoin layer" hasn't resonated with DeFi users, and the Singularity Roadmap schedules FPIS to convert to FXS by 2028 -- implicitly treating FPI as a legacy product.
Governance/Sovereignty are middle-tier (~3.0)
Frax's frxGov Alpha/Omega system with on-chain voting + Safe multisig is more formalized than many DeFi peers, but voting power is concentrated among team/early backers (FIP-418 passed unanimously with thin participation), there is no separation between monetary and operational governance, and no immutable constitutional protection for the CPI-peg mechanism.
Big takeaway: FPI is the most ambitious real-world attempt at M69's "spending power stability" commandment but is undermined by its fiat-dependent architecture and chronic lack of adoption.
It is simultaneously the best-designed CPI stablecoin in production and the most instructive case of how hard it is to convince DeFi users to hold purchasing-power-stable money over nominal USD stablecoins. For partners or investors, FPI is interesting as a mechanism-design reference; as a monetary system it is a niche experiment now being folded back into the broader Frax stack.
M69 Score
M69 Alignment3.1
Partially aligned
1.02.03.04.05.0
Monetary Sovereignty3.3
Issuance (3x) + Stability (2x) + Fiat Indep. (2x)Civilizational Durability2.9
Sovereignty + Governance + ResilienceUniversal Adoption2.7
Traction (2x) + InclusivityIss Mod3x
3.6
Stability2x
4.1
Fia Ind & Int2x
2.1
Traction2x
2.3
Sovereignty
3.0
Governance
2.9
Resilience
2.9
Inclusivity
3.5
Scored against the Money2069 Manifesto — see methodology. Higher = more aligned.
Detailed Rating Breakdown
Issuance Model3x3.6
| Code | Question | Score |
|---|---|---|
| IM-01 | Is issuance permissionless?Any user can mint FPI permissionlessly via the FPI Controller Pool by depositing frxUSD/FRAX collateral; redemption is symmetric. There is no KYC or whitelist, but minting requires the on-chain collateral-locking action (non-custodial) and pre-acquiring frxUSD/FRAX. | 4 |
| IM-02 | Is new supply created through debt?FPI is issued against 100%-backed collateral (frxUSD/FRAX), not a collateralized loan. Users swap collateral of equal value for FPI via the Controller Pool; there is no borrowing, stability fee, or debt position. This is a reserve-backed swap model, not a debt-based CDP. | 5 |
| IM-03 | Is issuance tied to measurable real-world economic activity?FPI's peg target is algorithmically tied to the US CPI-U index, a published real-economy price index committed on-chain via a specialized Chainlink oracle. The CPI index requires BLS human methodology input, and issuance itself responds to user mint/redeem demand rather than directly tracking economic output, so the link is partial (real-world data → peg target, not supply). | 3 |
| IM-04 | Does the issuance model have a supply cap or hard ceiling?No hard cap. Supply expands and contracts based on user mint/redeem actions, constrained by the 100% collateral-ratio invariant. Governance can set mint/redeem fee parameters and collateral-ratio bounds, which act as soft governance-adjustable circuit breakers rather than a fixed ceiling. | 3 |
| IM-05 | Can supply contract (burn/redemption) as well as expand?Yes -- redemption is permissionless via the Controller Pool; users receive frxUSD/FRAX for burning FPI. Contraction is user-initiated rather than automatic, but functions symmetrically with expansion. | 3 |
Spending Power Stability2x4.1
| Code | Question | Score |
|---|---|---|
| SPS-01 | What mechanism does the protocol use to target spending power stability?FPI uses an algorithmic, on-chain mechanism tied directly to a real-economy price index (US CPI-U). The CPI Tracker Oracle commits BLS monthly inflation data to chain, and the redemption price grows per second between updates. A `twammToPeg` function automatically pushes market price toward the redemption price via TWAMM-based arbitrage, and the 100% collateral-ratio invariant is maintained by auto-selling FPIS for FRAX when treasury yield lags CPI. This is closer to "algorithmic with some oracle input" than fully autonomous because CPI releases come monthly. | 4 |
| SPS-02 | What benchmark is used to measure spending power?FPI targets the US CPI-U 12-month inflation rate published by the Bureau of Labor Statistics -- an established multi-component price index with published methodology tracking a broad basket of consumer goods and services. Per rubric, "established multi-component index (e.g. CPI, commodity basket) with published methodology... represents genuine multi-factor spending power measurement" = 4. Single-country bias prevents 5. | 4 |
| SPS-03 | How transparent and verifiable is the stability measurement?The redemption price is an on-chain state variable updated by a specialized Chainlink oracle that delivers BLS CPI-U data. The oracle is verifiable on-chain and the Controller Pool, price-growth-per-second logic, and collateral ratio are all auditable in real time. The underlying BLS data is publicly available but off-chain from a single government source. | 4 |
| SPS-04 | What is the protocol's historical deviation from its stability target?FPI has been live since April 2022 (4 years). Market price has tracked the redemption target closely -- example: $1.11 in Oct 2024 for a target reflecting ~3.5-4%/yr drift from Dec 2021 $1.00 base, and ~$1.14 in March 2026. No major depeg events are documented; the 100% collateral ratio and FPI Controller Pool arbitrage have kept deviations small. No reliable long-series deviation figure is published, but secondary aggregator data shows market price oscillating closely around the redemption target. Awarding 4 for 2-5% range with 1-3 year live track record (conservative given no authoritative deviation study). | 4 |
| SPS-05 | Does the protocol distinguish between short-term volatility and long-term purchasing power drift?FPI primarily targets long-term purchasing-power drift: the redemption price grows per second to match CPI over time. Short-term market-price deviations are dampened by Controller Pool arbitrage and the TWAMM-to-peg mechanism. Distinct mechanisms exist for both timescales (oracle-driven monthly peg updates for long-term drift; TWAMM + mint/redeem fees for short-term), but the long-term axis is the primary stated purpose. Per rubric, "primarily targets long-term purchasing power; short-term dampening is a secondary feature" = 4. | 4 |
| SPS-06 | Is the stability mechanism accessible globally?FPI is an ERC-20 token on Ethereum (with deployments / trading on Arbitrum, BSC). Minting, redemption and secondary trading are permissionless and globally accessible with no geographic restriction or KYC at protocol level. Regional front-end restrictions may apply to some Frax interfaces, but the core stability mechanism (Controller Pool, oracles) is open to any address. | 5 |
Fiat Independence & Interoperability2x2.1
| Code | Question | Score |
|---|---|---|
| FI-01 | What is the protocol's unit of account?FPI has its own on-chain unit (1 FPI = Dec-2021 purchasing power), but is architecturally defined relative to the US CPI-U and therefore relative to the US dollar. It is a CPI-adjusted USD rather than a fully sovereign unit. Per rubric, "hybrid unit; partially defined by fiat (e.g. tracks a basket where fiat is one of several components)" fits loosely; the closer rubric match is "own unit of account but bootstrapped with fiat reference". | 3 |
| FI-02 | What is the fiat composition of the protocol's collateral or reserves?FPI is backed 1:1 by frxUSD (formerly FRAX). After the unanimously approved FIP-418 (January 2025), frxUSD is backed by BlackRock's BUIDL fund -- cash, US Treasury Bills, and repurchase agreements -- tokenized by Securitize. Effectively, the backing is US Treasuries and bank cash. This places FPI at 90-100% fiat/fiat-backed reserves. | 1 |
| FI-03 | Does the protocol depend on fiat banking infrastructure to function?The FPI contracts themselves run entirely on-chain, but the reserve backing (frxUSD -> BUIDL) depends on BlackRock/Securitize and the US Treasury banking system for its real-world assets. On-chain redemption for FPI works without banks; redemption of the underlying BUIDL tokens back to USD does require banking. Core protocol can function without banks; reserve quality depends on them. | 3 |
| FI-04 | Are the protocol's price feeds and oracles fiat-denominated?The CPI Tracker Oracle is denominated in CPI-U (implicitly USD-referenced). The FRAX/FPI price feed is USD-denominated. Oracles are sourced via decentralized Chainlink infrastructure but the values are fiat-denominated. | 2 |
| FI-05 | What happens to the protocol if the primary fiat currency it references collapses or depegs?If USD/BLS CPI-U became unavailable or unreliable, the peg target would lose its data feed and the BUIDL-backed frxUSD collateral would likewise collapse. The protocol has no documented migration path to a non-USD CPI or commodity basket. A USD collapse would be existential. | 1 |
| FI-06 | Does the project have a credible transition path from fiat-dominated adoption to fiat-independent operation?Frax documentation mentions a longer-term aspiration to expand collateral to bridged BTC/ETH and eventually non-crypto consumer-good tokens, and to include non-USD inflation indices. However, post-2025 the direction has actually moved deeper into fiat dependency (BUIDL/Treasuries), and FPIS is scheduled to phase out into FXS by 2028 with no concrete multi-phase non-fiat transition plan for FPI. Aspirational, not measurable. | 2 |
| FI-07 | Can local or sectoral currencies be denominated in or settle against this currency?FPI is a vanilla ERC-20 redeemable against frxUSD. The architecture does not natively provide local-currency composability primitives (no mutual-credit layer, no local-issuance module). Other DeFi protocols could use FPI as a reference unit in theory, but no local or sectoral currencies have been built on top of it. | 2 |
| FI-08 | Does the protocol define open standards for interoperability with other monetary systems?FPI is ERC-20 with cross-chain deployments (Ethereum, Arbitrum, BSC) bridged via generic crypto infrastructure (Curve, Fraxswap, Uniswap V3). No protocol-specific monetary interoperability standard for cross-system settlement or CPI-peg mutual recognition is defined. Interoperability is generic DeFi-level. | 3 |
Traction2x2.3
| Code | Question | Score |
|---|---|---|
| TR-01 | Is the project still active?FPI is live and minting/redeeming as of 2026, with an active Chainlink CPI oracle and live redemption contract. Development pace has slowed: Frax's Singularity Roadmap schedules FPIS to convert to FXS by March 2028, and secondary markets show extremely low volume (~$1.3K/24h on CMC). Active but in maintenance mode / slow growth, not growing. | 4 |
| TR-02 | How long has the project been in existence?FPI launched in late March / April 2022; by April 2026 it has been live ~4 years. | 3 |
| TR-03 | How many active users does the project have?No authoritative daily-active-user figure is published. FPI's reported circulating supply is ~84.7M with FDV ~$96.7M and 24h volume ~$1.3K. Etherscan token trackers show a small number of holders and very low transfer activity. Estimated user base is well below 1K active users; more likely hundreds. Per rubric, "<1K or no measurable user base" = 1, "1K-10K" = 2. I assign 1 conservatively given the reported $1.3K daily volume across all venues. | 1 |
| TR-04 | How many businesses or organizations accept the project's currency?No evidence of merchant or business acceptance of FPI as a medium of exchange. FPI is used as a DeFi inflation-hedge holding, not a payment instrument. | 1 |
| TR-05 | Is the currency used as a unit of account?Frax docs describe FPI as an "on-chain denomination system to measure real value growth against inflation," and some DAO/treasury benchmarks use FPI as a yardstick. No evidence of wages, contracts, or merchant prices being natively denominated in FPI by independent parties. Always quoted as USD-equivalent. | 2 |
| TR-06 | Is the founder or core team still actively working on the project?Sam Kazemian and Travis Moore remain as advisors; the Frax company is now led by Ted Forselius, Navin Vethanayagam, and Cesar Rodriguez (~13 team members as of late 2024). Governance proposals related to Frax continue actively in 2026. For FPI specifically, the team treats it as a legacy product scheduled for wind-down via FPIS-to-FXS conversion. | 4 |
| TR-07 | What partner organizations or institutions support or integrate the project?Indirect partner set via Frax ecosystem: Chainlink (oracles), BlackRock / Securitize (BUIDL backing for frxUSD), Curve, Fraxswap, Uniswap V3. Directly integrated FPI partners are limited -- 2-5 meaningful. | 3 |
| TR-08 | Is the project covered or recognized by credible external sources?CoinDesk, CoinTelegraph, The Defiant and others have covered FPI since its 2022 launch. No peer-reviewed academic work specifically about FPI surfaced. Covered in niche crypto media but not cited in major policy or research papers. | 3 |
| TR-09 | Is adoption organic -- not dependent on subsidies, incentives, or mandates?FPI launched with an airdrop to FRAX/FXS holders and subsequently relied on Frax-ecosystem liquidity mining via Curve/Fraxswap AMOs to bootstrap pools. Current activity is low, suggesting organic demand is thin beyond the initial incentive-driven bootstrap. | 2 |
| TR-10 | What is the growth trend over the past 12 months?Reported supply (~84.7M) and FDV (~$96.7M) have been roughly flat or declining relative to prior years; secondary-market volume is effectively zero. No meaningful growth; adoption has stagnated since the 2022 launch bump. Sky-lite adoption but not sharp decline. | 2 |
| TR-11 | Does the project have a coherent narrative and cultural identity that drives long-term commitment?FPI has a clear and coherent narrative: "first CPI-pegged stablecoin, preserves purchasing power on-chain." The broader Frax community has a strong cultural identity, but FPI-specific community engagement is transactional, and there are no cultural artifacts (manifesto, rituals) that would drive century-scale commitment to FPI specifically. | 3 |
Sovereignty3.0
| Code | Question | Score |
|---|---|---|
| SO-01 | Can any single entity shut down the project?Core FPI smart contracts live on Ethereum; no single entity can halt Ethereum consensus. However, Frax governance (frxGov Alpha/Omega) plus a 3-of-5 Safe multisig holds upgrade authority over the Controller Pool, and the frxUSD collateral ultimately depends on BlackRock/Securitize for real-world redemption. Theoretical shutdown vectors require coordinating governance + custodians -- shutdown is not trivially single-entity. | 3 |
| SO-02 | Is the project's core infrastructure permissionless and self-hostable?All FPI contracts are open-source in FraxFinance/frax-solidity on GitHub, audited by CertiK and others. Users can interact directly with the contracts; front-ends are replaceable. The protocol depends on Ethereum plus Chainlink oracles (permissioned feed infrastructure). | 4 |
| SO-03 | Is the project subject to the jurisdiction of a single nation-state?The Frax team and core contributors are largely US-based (Sam Kazemian, Travis Moore). Frax has adopted BlackRock BUIDL (US-registered) as collateral, placing significant operational exposure in the US jurisdiction. The DAO is not incorporated as a single legal entity but US regulatory action could materially impair FPI. | 2 |
| SO-04 | Does the project control or custody user funds?FPI is an ERC-20 held in user wallets; the protocol is non-custodial at the token layer. The underlying frxUSD collateral (BUIDL) is custodied by institutional partners (BlackRock/Securitize), but that affects reserve custody rather than user holdings. For the end user, FPI is fully self-custodial. | 4 |
| SO-05 | Is the project resilient to key-person risk?Sam Kazemian remains influential as advisor and high-profile public face; day-to-day leadership sits with Ted Forselius, Navin Vethanayagam, Cesar Rodriguez and a ~13-person team. Protocol contracts operate autonomously once deployed. Moderate key-person exposure via Kazemian but distributed operational knowledge. | 3 |
| SO-06 | Does the project depend on any third-party service that could be revoked?Critical dependencies: Chainlink for AMPL/USD-equivalent and the specialized CPI oracle; Ethereum L1; BlackRock BUIDL / Securitize for collateral quality; BLS for underlying CPI data. Chainlink and BUIDL are meaningful single points of failure; alternatives exist (Tellor, other RWA providers) but migration would be disruptive. | 2 |
| SO-07 | Can the project be censored -- can specific users or transactions be blocked?The FPI ERC-20 itself has no documented blacklist or freeze function. However, the frxUSD collateral (BUIDL) is a regulated RWA token that can be frozen at the custodian level; that would not block FPI-to-FPI transfers but could impair redemption. Core FPI transfers remain censorship-resistant. | 4 |
| SO-08 | Does the protocol protect transaction privacy as a monetary right?Standard Ethereum pseudonymity. All FPI transfers, mints, redemptions, and oracle updates are publicly visible on-chain. No privacy-preserving features. | 3 |
| SO-09 | Does the technology enforce the project's monetary rules such that governance cannot silently override them?Core monetary rules (redemption price = last CPI update × per-second growth, 100% collateral invariant) are enforced on-chain by smart contracts. Parameter changes and upgrades route through frxGov (Alpha/Omega) with on-chain voting and Safe multisig approval -- public logging but limited mandatory time-lock on some operations. Governance can change the CPI oracle source, mint/redeem fees, and upgrade the Controller Pool. On-chain enforcement exists but silent override is technically possible via the admin multisig for some parameters. | 3 |
Governance2.9
| Code | Question | Score |
|---|---|---|
| GO-01 | How are decisions about the project made?Frax uses the frxGov system with two on-chain governors (FraxGovernorAlpha for veFXS proposals, FraxGovernorOmega as an additional Safe co-signer). FPI-specific governance also uses veFPIS / FPIS voting for parameters like peg source and fees. Process is publicly documented, proposals go through forum discussion, snapshot signaling (historically), then on-chain vote. | 4 |
| GO-02 | Who has voting or decision-making power, and how is that power distributed?Voting power comes from veFXS (locked FXS) and veFPIS (locked FPIS). FPIS circulating supply is ~29M of 41M total, with significant team/early-backer allocations and an upcoming conversion to FXS. Top holders of veFXS are concentrated; a 3-of-5 multisig (Sam Kazemian, Travis Moore, Jason Huan, Justin Moore + one) handles ~$690M of treasury. Top 5 likely control >50% of effective governance power. | 2 |
| GO-03 | Is the governance process -- and the monetary mechanism itself -- transparent and publicly auditable?Proposals and votes are on-chain via FraxGovernorAlpha/Omega and recorded in the public gov.frax.finance forum. Smart contracts are open-source in FraxFinance/frax-solidity. The FPI peg mechanism (CPI oracle, Controller Pool, per-second price growth) is fully auditable on-chain. Some deliberation occurs in Discord/Telegram (semi-public). | 4 |
| GO-04 | Can governance be captured by a small group or hostile actor?Standard token-weighted voting with veFXS lockups. No quadratic voting, no identity-weighted governance. Team and early backers hold enough veFXS to pass major proposals; the FIP-418 BUIDL vote passed unanimously with limited broad participation. Well-funded actors could acquire enough to capture governance, and the Omega governor requires Safe team co-sign -- which is itself capturable by the multisig. | 2 |
| GO-05 | How are upgrades and changes to the protocol or project proposed and executed?Structured: forum proposal -> formal FIP numbering -> on-chain vote via Alpha/Omega -> execution. Examples include FIP-418 (BUIDL collateral), FIP-377 (veFXS reward distribution), FIP-341 (Singularity Roadmap). Some timelock mechanisms exist but veto mechanisms are limited. | 4 |
| GO-06 | Is there a separation between governance over monetary policy and governance over operational decisions?No formal separation. Monetary-policy parameters (CPI oracle source, peg growth logic, collateral ratio, mint/redeem fees) and operational parameters go through the same FIP process. Awareness of the distinction exists in forum debate but not structurally enforced. | 2 |
| GO-07 | Does the project have a constitution, charter, or set of immutable principles?FPI's founding docs articulate principles (CPI peg, 100% CR, redemption price grows per second), and Frax's Singularity Roadmap sets long-term vision. No on-chain immutable constitution; governance can amend any parameter. The design philosophy is stated but not formally protected. | 2 |
| GO-08 | Can the project's issuance rules be changed, and are monetary policy changes subject to stronger constraints than operational changes?Issuance rules (mint/redeem fees, oracle source, collateral ratio thresholds) can be changed through the standard FIP governance process. The Singularity Roadmap itself proposes phasing out FPIS into FXS by 2028 -- a fundamental monetary-architecture change passing through the same governance process as operational changes. No special supermajority or extended time-lock for monetary policy vs operational. | 3 |
Resilience2.9
| Code | Question | Score |
|---|---|---|
| RE-01 | Has the project survived a major crisis or adversarial event?FPI has been live since April 2022, operating through the 2022 crypto winter, UST collapse, SVB/USDC contagion (March 2023, when the original FRAX backing was USDC), and 2024-25 market stress. The FPI redemption contract kept functioning; the broader Frax ecosystem had to shift FRAX's peg stability mechanism and later migrated to frxUSD/BUIDL. FPI itself has not suffered a major depeg event but has survived indirect ecosystem stress. Moderate stress; parameters adjusted but core mechanism held. | 3 |
| RE-02 | Does the project have redundancy in its critical infrastructure?Oracle feed is Chainlink (single dominant provider for the specialized CPI feed). Contracts deployed on Ethereum with satellite deployments on Arbitrum and BSC. Liquidity on multiple venues (Curve, Fraxswap, Uniswap V3). Limited redundancy at the oracle layer. | 3 |
| RE-03 | Can the project recover from a catastrophic failure?All contract code is open-source on GitHub; all state is on-chain on Ethereum; CPI oracle history is public. A competent team could redeploy. No formal tested disaster-recovery plan is published. | 3 |
| RE-04 | Is the project's design simple enough to be maintained and understood long-term?The core idea is simple (CPI oracle + per-second redemption-price growth + 100% collateral). Implementation includes AMO pattern, Controller Pool, TWAMM-to-peg, FPIS seigniorage logic, veFPIS, frxGov Alpha/Omega -- moderate complexity that requires Frax-ecosystem familiarity. Documentation exists but is spread across Frax docs. | 3 |
| RE-05 | Is the project dependent on a specific technology that could become obsolete?Built on Ethereum/EVM -- the dominant smart-contract platform with plausible multi-decade longevity. Logic is not intrinsically Ethereum-specific and could be re-implemented on any EVM chain; BSC/Arbitrum deployments prove portability. No tested migration to non-EVM. | 3 |
| RE-06 | How does the project handle economic stress (bank runs, liquidity crises, collateral crashes, inflation/deflation shocks)?FPI has explicit handling for macro stress: inflation is the target (so high-CPI environments cause peg growth rather than breakage), and if treasury yield lags CPI the protocol can sell FPIS for frxUSD via TWAMM to backfill. 100% collateral ratio reduces bank-run risk at the FPI layer. However, the underlying frxUSD reserve quality depends on BUIDL/US Treasuries; a Treasury-market crisis or USD deflation shock would strain the system. Mechanisms designed and documented; partially battle-tested (2022-2025 inflation shocks). | 4 |
| RE-07 | Does the project have sustainable funding for long-term maintenance?FPI-specific revenue is small (thin volume, ~$3M FPIS market cap, ~$10.7M FDV). It is subsidized by the broader Frax protocol which maintains healthy revenue. The Singularity Roadmap converts FPIS to FXS by 2028 implicitly merging FPI's funding into Frax's treasury. Funded in aggregate but FPI as a standalone product has weak revenue. | 3 |
| RE-08 | Can the system operate across extreme latency, disconnected networks, and multi-century timescales?Requires continuous Ethereum block production and monthly Chainlink oracle updates. Cannot operate in disconnected networks; CPI data and Treasury backing are inherently US-government-schedule-dependent. Multi-century operation would require both Ethereum and BLS CPI-U to persist. | 2 |
| RE-09 | Is the system designed for a world where AI agents are primary economic actors?FPI is a standard ERC-20 with smart-contract minting/redemption. AI agents can hold, transfer, mint, and redeem FPI programmatically with no KYC or CAPTCHA at protocol level. Protocol was not specifically designed for AI agents but is fully programmable and composable. | 4 |
Inclusivity3.5
| Code | Question | Score |
|---|---|---|
| IN-01 | Can anyone in the world participate regardless of nationality, wealth, or status?FPI is a permissionless ERC-20; anyone with an Ethereum/Arbitrum/BSC wallet can hold and trade FPI. No KYC, nationality restriction, or credit check at protocol level. Minor practical barriers: internet access, gas fees, acquiring frxUSD/FRAX for minting. Front-end geo-blocks may apply but do not prevent direct contract interaction. | 4 |
| IN-02 | What is the minimum cost to start using the project?On Ethereum mainnet, gas fees for minting/redeeming via the Controller Pool can reach $5-30 depending on congestion. On Arbitrum the cost is sub-$1. No minimum balance at protocol level, but practically users need some FRAX/frxUSD to mint FPI. Moderate cost for mainnet, low cost on L2. | 3 |
| IN-03 | Does the project actively serve underbanked or financially excluded populations?FPI is marketed as an inflation-hedge for DeFi users, not specifically targeted at the underbanked. Accessible in theory to anyone with crypto skills but no outreach or product design for financially excluded populations. | 3 |
| IN-04 | Does the project distribute economic benefits -- including seigniorage -- broadly, or concentrate them among insiders?Seigniorage (excess yield above CPI drift) flows to FPIS holders, and initial FPIS was airdropped to FXS holders and allocated to the treasury/team. FPI minting/redemption is open to all. FPIS token distribution is somewhat concentrated among early Frax ecosystem participants but the rebase-like peg mechanism does not discriminate among holders. Mixed: benefits broadly distributed to token holders but initial insider allocation. | 3 |
| IN-05 | Does the project treat all participants equally under the same rules?Core rules are identical for all participants -- same mint fee, same redeem fee, same redemption price per FPI. No tiered access or preferential rates. Governance is token-weighted (veFXS/veFPIS) so larger holders have more influence, but monetary treatment is equal. | 4 |
| IN-06 | Does the project require identity documentation or surveillance to participate?No KYC or identity requirement for protocol-level FPI usage. Fully pseudonymous. KYC may apply at centralized exchanges that list FPI, but these are optional. | 4 |
| IN-07 | Does the project have mechanisms to prevent wealth concentration over time?No anti-concentration mechanisms. Seigniorage to FPIS flows proportional to holdings; veFPIS/veFXS rewards are proportional to stake. Larger holders compound faster. Neutral on rebases (peg growth applies uniformly) but staking/governance design tends to accelerate concentration. | 2 |
Frequently Asked Questions
What is Frax Price Index (FPI) and what problem does it solve?
Frax Price Index (FPI) is the first production stablecoin whose redemption price targets the US Consumer Price Index (CPI-U) rather than a single fiat unit. Launched within the Frax Finance ecosystem in late March / April 2022 by co-founders Sam Kazemian and Travis Moore, FPI's peg is computed on-chain from the BLS-reported 12-month CPI-U inflation rate delivered monthly by a specialized Chainlink oracle.
How is money created in Frax Price Index (FPI)?
Any user can mint FPI permissionlessly via the FPI Controller Pool by depositing frxUSD/FRAX collateral; redemption is symmetric. There is no KYC or whitelist, but minting requires the on-chain collateral-locking action (non-custodial) and pre-acquiring frxUSD/FRAX.
How does Frax Price Index (FPI) maintain stable spending power?
FPI uses an algorithmic, on-chain mechanism tied directly to a real-economy price index (US CPI-U). The CPI Tracker Oracle commits BLS monthly inflation data to chain, and the redemption price grows per second between updates. A `twammToPeg` function automatically pushes market price toward the redemption price via TWAMM-based arbitrage, and the 100% collateral-ratio invariant is maintained by auto-selling FPIS for FRAX when treasury yield lags CPI.
Is Frax Price Index (FPI) independent from fiat currencies?
FPI has its own on-chain unit (1 FPI = Dec-2021 purchasing power), but is architecturally defined relative to the US CPI-U and therefore relative to the US dollar. It is a CPI-adjusted USD rather than a fully sovereign unit. Per rubric, "hybrid unit; partially defined by fiat (e.g.
Who controls Frax Price Index (FPI) and can it be shut down?
Core FPI smart contracts live on Ethereum; no single entity can halt Ethereum consensus. However, Frax governance (frxGov Alpha/Omega) plus a 3-of-5 Safe multisig holds upgrade authority over the Controller Pool, and the frxUSD collateral ultimately depends on BlackRock/Securitize for real-world redemption. Theoretical shutdown vectors require coordinating governance + custodians -- shutdown is not trivially single-entity.
How widely adopted is Frax Price Index (FPI) today?
No authoritative daily-active-user figure is published. FPI's reported circulating supply is ~84.7M with FDV ~$96.7M and 24h volume ~$1.3K. Etherscan token trackers show a small number of holders and very low transfer activity.
Is Frax Price Index (FPI) still active and growing?
FPI is live and minting/redeeming as of 2026, with an active Chainlink CPI oracle and live redemption contract. Development pace has slowed: Frax's Singularity Roadmap schedules FPIS to convert to FXS by March 2028, and secondary markets show extremely low volume (~$1.3K/24h on CMC). Active but in maintenance mode / slow growth, not growing.
What are the main risks or weaknesses of Frax Price Index (FPI)?
Weakest category: Fiat Independence (2.1/5.0): FPI's central paradox: it targets purchasing power rather than a nominal fiat unit (M69-aligned intent) but implements that through a US-specific CPI index delivered by a centralized BLS feed, with collateral now routed through BlackRock BUIDL (cash and US Treasuries). The goal is fiat-independent purchasing power; the pipes are almost entirely fiat-dependent.
What makes Frax Price Index (FPI) unique from an M69 perspective?
Strongest category: Spending Power Stability (4.1/5.0): FPI is the first and only production stablecoin whose redemption price is algorithmically tied to a real-economy price index (US CPI-U) and updated per second on-chain. It explicitly targets long-term purchasing-power preservation (the precise SPS commandment) while using Controller Pool arbitrage and TWAMM pressure for short-term dampening. This is as close to a purpose-built purchasing-power stablecoin as currently exists in production.
How is Frax Price Index (FPI)'s M69 Score calculated?
Frax Price Index (FPI) scores 3.1/5.0 overall. Pillar scores: Monetary Sovereignty 3.3, Civilizational Durability 2.9, Universal Adoption 2.7. Strongest: Spending Power Stability (4.1). Weakest: Fiat Independence (2.1).