USDY is a yield-bearing token issued by Ondo Finance, backed by short-duration U.S. Treasuries and bank demand deposits. Each USDY represents a senior unsecured claim on a portfolio held by Ondo USDY LLC, a Delaware bankruptcy-remote vehicle. The token accrues interest through a rising redemption value: holders see USDY trading at a premium to $1.00 that grows over time, with the premium reflecting accumulated yield. As of April 25, 2026, USDY pays 4.65% APY, with $740 million in supply across Ethereum, Solana, Mantle, Sui, and Aptos (Ondo USDY composition).
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Below we explain the structure, the yield mechanics, the regulatory restrictions (USDY is non-U.S.-only), and how it compares to other tokenized-Treasury offerings like BUIDL and OpenEden TBILL. Read the claim structure first: USDY is a note, not a fund share, and that single distinction drives where it sits in a credit stack. USDY is the most chain-distributed of the major tokenized-Treasury wrappers, which makes it the de facto standard for cross-chain treasury allocations to short-duration government debt.
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The framing we would start from: USDY is a tokenized note. The token represents a debt claim on Ondo USDY LLC, secured by a portfolio of U.S. Treasury securities (with maturities under 6 months) and bank demand deposits at insured U.S. banks. The portfolio is held in segregated custody and reviewed monthly by an independent auditor. As of April 2026 the composition is approximately 92% Treasuries and 8% bank deposits, with the deposit portion functioning as redemption-day liquidity (Ondo transparency reports).
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USDY launched in August 2023 as an Ethereum-native token. It expanded to Solana in early 2024, Mantle and Sui in mid-2024, and Aptos in late 2024. Cross-chain availability is bridged through native deployments coordinated with Ondo's issuance system. Supply has grown substantially since launch and is spread across those chains; current supply and the per-chain split are published on Ondo's USDY page.
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USDY's distinctive feature is its accrual mechanism. The token does not target $1.00. It launched at $1.00 and the redemption value rises with accrued interest. As of April 23, 2026, 1 USDY trades at approximately $1.117. There is also a rebasing variant, rUSDY, that pays interest as a balance increase rather than a price increase. Holders choose the form that fits their accounting.
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The mechanism is straightforward. The complexity lies in the legal structure and the redemption process.
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Ondo USDY LLC holds Treasuries through a regulated broker-dealer (Morgan Stanley) and bank deposits at multiple U.S. insured banks. The Treasuries are short duration to minimize interest-rate risk; the deposits provide T+1 redemption liquidity. BlackRock acts as investment manager.
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Each USDY is a transferable digital note representing a fractional senior claim on the LLC's assets. Holders receive interest pro-rata to their balance, calculated daily and reflected in the redemption value (or the rebased balance for rUSDY).
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The yield is the weighted-average return on the portfolio minus the annual management fee set out in Ondo's USDY documentation. The blend of short-dated Treasuries and bank deposits, less that fee, produces the headline APY.
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Mint requires KYC. Eligible holders wire USD to Ondo's bank, and Ondo mints USDY at the current token price. Redemption is the reverse: holders submit USDY to the contract, and Ondo wires USD on T+1. Minimum mint and redemption: $100,000. Below that minimum, holders rely on secondary-market liquidity (Curve, Aerodrome, Solana DEXs) to enter and exit.
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Ondo coordinates supply across chains through a controlled mint-burn process. There is no single canonical chain; Ondo can shrink supply on one chain and expand on another to match demand. This contrasts with many tokenized-Treasury products that exist on a single chain. The cross-chain availability is why USDY appears in DeFi vaults on Solana, Sui, and Mantle that have no other Treasury exposure.
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USDY's yield tracks the front-end Treasury curve less the management fee, and the APY is set monthly by Ondo under the USDY governing documents rather than floating continuously, per Ondo's USDY page. We have deliberately not reproduced a rate history here. Any figure we printed would be stale within the month and we could not verify past months against a primary source, so read the current rate from Ondo's USDY page directly.
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Directionally, the rate falls as the Fed cuts and rises as it hikes, with a lag while the portfolio rolls into newly issued bills. Fixed-yield exposure is available through Pendle's PT-USDY market on Ethereum for anyone who would rather lock a rate than take that drift.
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Four risks matter here and they are not equally weighted. Custodian and redemption-queue risk are the ones that would actually stop you getting your money back; interest-rate risk only changes what you earn next. We would read them in that order.
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Treasuries are held at Morgan Stanley; deposits at multiple insured banks. A custodian failure freezes redemption. Bank deposits are FDIC-insured up to $250,000 per bank, meaningful for retail but immaterial for the multi-million-dollar deposit positions Ondo holds. The Treasury holdings are bankruptcy-remote from Morgan Stanley's broker-dealer balance sheet.
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The portfolio is short duration. Because the portfolio is short duration, a parallel shift in the curve produces only a small mark-to-market change. The risk is a step-function at Fed meetings: yields drop, USDY's go-forward APY drops with them. Past accruals are locked in.
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T+1 redemption assumes orderly demand. A Friday-evening redemption queue clears Monday. A holiday weekend can stretch to T+3. During an SVB-style stress event, the bank-deposit leg might be temporarily unavailable, deferring redemption until the Treasury portion can be sold and settled.
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Each chain deployment is a contract. Cross-chain coordination introduces a transient inconsistency window during supply moves. Ondo audits cover Spearbit and OpenZeppelin for the Ethereum and Solana deployments; newer chains (Sui, Aptos) have correspondingly less audit history.
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USDY is restricted to non-U.S. persons. The Ondo terms and the LLC's offering memorandum exclude U.S. holders from primary issuance. Secondary-market acquisition by U.S. persons is technically possible but legally murky. U.S. institutions seeking equivalent exposure typically use Ondo's separate U.S.-permitted product (OUSG, which is qualified-purchaser only).
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USDY's edge is chain availability. The token is the easiest tokenized-Treasury exposure for a Solana-native team, a Sui-native team, or a multi-chain treasury that wants Treasury yield without bridging T-bill exposure manually. Mountain Protocol's USDM used to compete here on rate, but Mountain wound USDM down, closed the primary market and cut the rate to 0.00% APY, per mountainprotocol.com, so it is no longer an option. BUIDL is institutional-only.
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There are two ways in, and which one applies to you is mostly a question of size and jurisdiction. Direct mint runs through Ondo with KYC and a high minimum; the secondary market is open to any wallet but prices at whatever the venue quotes.
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Eligible holders complete KYC with Ondo, wire USD, and receive USDY. Redemption mirrors the process. The $100K minimum makes this path institutional-only in practice.
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Anyone with a wallet can buy USDY on Curve (Ethereum), Orca (Solana), Aerodrome (Base via bridge), or any DEX listing. Spreads vary by venue and depth; quote them at execution rather than assuming a fixed range. The acquired USDY accrues interest the same way regardless of how it was obtained.
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USDY is collateral on multiple DeFi platforms. Notable: Drift Protocol on Solana lists USDY collateral, Aave V3 on Ethereum has had governance proposals to onboard it, and Pendle splits USDY into PT and YT tokens for fixed-yield exposure.
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Treasury teams use USDY as a yield-bearing alternative to plain USDC for working-capital balances. The 4.65% on idle dollars compares to 0% on Circle's USDC. The trade-off is the non-U.S. restriction and the dependence on Ondo's custodian relationships.
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USDY's chain availability is its most distinctive feature among tokenized-Treasury products. The breakdown as of March 2026:

For a Solana-native team that wants Treasury exposure, USDY is the most accessible option without bridging from Ethereum-native products. BUIDL launched on Solana in March 2025 (one year after its Ethereum debut) and has since expanded to Aptos, Avalanche, Arbitrum, Optimism, Polygon, and BNB Chain. USYC is permissioned. USDY uniquely covers the multi-chain DeFi-native treasury use case.
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Secondary-market depth varies by chain:

A holder buying or selling USDY on any chain other than Ethereum or Solana should expect wider spreads and longer execution windows. Primary redemption is the cleaner exit at scale, subject to the $100K minimum and T+1 settlement.
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The token's composability is improving but is still limited compared to plain USDC. Notable integrations:

The composability ceiling is higher for USDY than for permissioned tokens like BUIDL or USYC, lower than for sUSDS or sUSDe. The token's regulated status (non-U.S.-only) limits some integrations.
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USDY's multi-chain presence means a treasury team can hold USDY on Solana, Ethereum, or Sui simultaneously. Settling payments still requires unwinding to USDC or USDT and routing to the destination. Eco Routes orchestrates the multi-leg path: a team holds USDY on Solana, submits an intent to settle 100,000 USDC on Base, and Routes selects solvers willing to source USDC on Base in exchange for USDY-denominated value on Solana. The team retains yield where it accrues most efficiently while still settling counterparty obligations on the chain those counterparties prefer. See digital dollars explained and stablecoin treasury APIs compared for related context.
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Ondo Finance issues several related yield products and understanding the family helps holders pick the right one. USDY is one entry in a structured set.

The product split reflects a regulatory bifurcation: U.S. holders use OUSG with QP credentials; non-U.S. holders use USDY across chains. The combined Ondo product family aims to make tokenized Treasury exposure available across regulatory regimes.
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USDY is a yield-bearing token. It does not target $1.00. The price rises with accrued interest. A rebasing variant (rUSDY) keeps a $1.00 price and increases the holder's balance instead. Both represent the same underlying claim. Read the digital dollars explainer for context on yield-bearing variants.
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Primary issuance is restricted to non-U.S. persons. Secondary-market acquisition by U.S. persons is technically possible but legally untested. U.S. institutions seeking equivalent exposure usually hold OUSG (Ondo's U.S.-permitted Treasury product) instead.
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OUSG is Ondo's U.S.-accessible tokenized Treasury product, structured as a pool that holds BUIDL and short-term Treasuries. It is qualified-purchaser only ($100K min net worth or $5M for entities). USDY is the non-U.S. version with broader chain support and a slightly higher net APY due to differences in fee structure.
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Direct T-bill ownership requires a brokerage account, settles through TreasuryDirect or a broker, and is U.S.-accessible. USDY tokenizes the exposure, settles 24/7 on multiple chains, integrates with DeFi, and accepts non-U.S. holders. The trade-off is the management fee and the additional custodian and smart-contract risk.
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rUSDY is the rebasing variant of USDY. It maintains a $1.00 token price and increases the holder's balance daily to reflect interest. Useful for accounting systems that prefer balance changes over price changes. Convertible 1:1 with USDY through the Ondo app.
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USDY's underlying assets are short-duration U.S. Treasuries; USDe's are crypto + perp shorts. By traditional credit-risk measures, USDY is materially safer. The trade-off is yield: USDY pays ~4.7%, sUSDe pays ~9.4%. Different risk profiles for different roles in a portfolio. See related automation platforms for routing options.
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