Etherfuse

Etherfuse is a real-world asset (RWA) platform that tokenizes sovereign government bonds and issues currency-denominated digital assets backed by those bonds, making institutional-grade fixed-income instruments accessible to retail investors, fintech companies, and corporate treasuries. Founded in 2022 by David Taylor (formerly Apple and MIT) and AJ Taylor, the company built its initial product on Solana before expanding to Stellar, Monad, Base, and Polygon. Its core thesis is that idle capital should earn sovereign-grade yield, and that blockchain settlement can dramatically lower the friction and cost of accessing that yield across borders and at micro-denomination sizes.

The Problem Etherfuse Addresses

Government bond markets have historically been dominated by institutional players, foreign investors, and state entities. Mexico illustrates the disparity sharply: the country has a $623 billion bond market with roughly $200 million in average daily trading volume, yet only 2% of bondholders are Mexican nationals. Retail access is gated by brokerage minimums, custody infrastructure, and legacy banking rails. Etherfuse targets this gap by representing bond positions as on-chain tokens that can be bought in increments as small as the USDC equivalent of one Mexican peso — a unit size that would be economically unviable on traditional financial infrastructure but works on Solana because per-transaction fees are negligible.

Stablebonds (eYield)

Stablebonds are the flagship product. Each token represents a proportional economic claim on a segregated pool of underlying sovereign debt and is valued at net asset value (NAV) rather than a fixed peg. NAV moves with interest accrual, sovereign credit spreads, market liquidity, fees, and operational costs. At maturity, holders can redeem tokens at the applicable NAV plus any accrued interest.

Etherfuse currently offers Stablebonds backed by five types of government debt:

• CETES — Certificados de la Tesorería de la Federación, Mexico's short-term treasury securities, which yield approximately 8% annually on 28-day instruments
• USTRY — US Treasury notes
• TESOURO — Brazilian government bonds
• EUROB — Eurozone government debt
• GILTS — UK government bonds

The interest-accrual mechanism is implemented on Solana using the token extensions program's interest-bearing extension. This allows Stablebond tokens to accrue value continuously on-chain without requiring weekly manual transfers of yield to holders — a significant reduction in operational overhead compared to earlier approaches. The minimum purchase size equals one peso in USDC value, enabling true micro-investment.

Commission structure scales with underlying yield: 0.25% fixed for yields below 4.5%, a formula-based rate for mid-range yields, and 1.5% fixed for yields at or above 10%. Mexican authorities withhold 0.5% of interest earnings as tax. Proof of reserves is published weekly and verified by third-party attestation firms.

Sovereign Coins (eFX)

Alongside Stablebonds, Etherfuse issues Sovereign Coins — blockchain-native currency tokens denominated in non-USD national currencies and backed by sovereign debt rather than cash deposits. The initial Sovereign Coin is MXNe, a Mexican peso-denominated token backed by CETES. Structurally these differ from USD-pegged stablecoins: the collateral earns yield, and the instruments are designed for cross-border use cases including remittances and corporate treasury management.

The eFX product targets USD-to-MXN conversion specifically, offering instant on-chain settlement against government-backed collateral at costs far below what traditional correspondent banking charges. As of 2025, Etherfuse enabled direct on/off-ramping from Mexican bank accounts — users can move from pesos to Stablebonds in a few clicks without going through a stablecoin intermediary.

Regulatory Status

In April 2024, Mexico's financial regulator CNBV issued Resolution P090/2024 granting no-action relief to Etherfuse Liquid, determining that its tokens do not require prior authorization. This made Etherfuse the first and only Mexican blockchain company to receive formal regulatory clarity allowing it to engage the general public and sell Stablebonds directly in Mexico. The company also maintains a government-approved regulatory sandbox arrangement, giving it a legal framework to operate while the broader Mexican regulatory environment around tokenized assets develops.

Security and Audits

Etherfuse's smart contracts have been audited by OtterSec, a prominent Solana-focused security firm, and Highland Security. The platform publishes proof of reserves reports weekly through independent third-party attestation. AML audit results and smart contract audit reports are publicly available through the Etherfuse platform dashboard.

Custodians and Integrations

Rather than self-custodying the underlying government securities, Etherfuse works with regulated custodians and banking partners. Named partners include BBVA, Shinhan Securities, B3 (Brazil's stock exchange operator), Felix Pago, Pago46, and Brale. This institutional custody layer segregates user assets from Etherfuse's operational balance sheet and forms the trust foundation of the proof-of-reserves system.

Beyond direct retail access, Stablebonds have been integrated as collateral by external DeFi protocols. Falcon Finance added tokenized CETES Stablebonds as accepted collateral, extending their utility into on-chain lending and yield markets. CETES Stablebonds are also listed and tracked on Coinbase.

Fit within the Solana Ecosystem

Etherfuse was built on Solana from inception, specifically because Solana's transaction costs make micro-denomination bond positions economically viable. CEO David Taylor noted that a one-peso Stablebond position still generates net value after a week even accounting for fees — something impossible on higher-cost chains. Solana's token extensions program, particularly the interest-bearing extension, enabled Etherfuse to embed yield accrual directly in the token standard rather than engineering it at the application layer. The project serves as a flagship example of Solana's RWA infrastructure, and Solana Labs has profiled it as a case study.

The platform now runs on multiple chains — Stellar, Monad, Base, and Polygon in addition to Solana — but Solana remains the origin chain and primary settlement layer for CETES Stablebonds. Etherfuse's product vision, described in a 2026 blog post titled "Stablecoins Are Not Enough," frames Stablebonds as a next-generation financial primitive that can underpin global payment and treasury systems in ways that non-yield-bearing stablecoins cannot.