OUSG is the Ondo Short-Term US Government Bond Fund, a tokenized money-market product issued by Ondo Finance that holds short-duration US Treasury exposure onchain. As of Q1 2026 OUSG carries roughly $625M in assets under management per rwa.xyz, with its underlying portfolio held in BlackRock's BUIDL fund following a 2024 migration. Access is restricted to verified qualified purchasers with a $100,000 minimum subscription.
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OUSG, short for the Ondo Short-Term US Government Bond Fund, is a permissioned ERC-20 token representing fractional ownership in a regulated fund holding short-duration US Treasury exposure. Each token tracks the net asset value of the fund. Ondo Finance issues OUSG to qualified purchasers who pass KYC, AML, and accreditation review, then mints or redeems against US dollars or stablecoins.
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The fund launched in January 2023 and was originally backed by a portfolio of short-term Treasury ETFs, primarily BlackRock's iShares Short Treasury Bond ETF (SHV). In 2024 Ondo restructured the fund to hold BlackRock's BUIDL token as its primary underlying, citing same-day mint and redemption capability through the BUIDL primary market. The legal wrapper is the Ondo Short-Term US Government Bond Fund LP, organized under Cayman Islands law, with Ankura Trust serving as administrator and trustee for the onchain wrapper.
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OUSG trades on three networks: Ethereum mainnet, Mantle, and Polygon. Token addresses are listed on the Ondo OUSG product page. Holders earn the net yield of the underlying portfolio, currently in the 4 percent area before fees, distributed through token rebasing on the rOUSG variant or via NAV growth on the standard OUSG token.
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OUSG operates as a permissioned fund token with a two-stage flow. Subscribers send USDC or USD to Ondo, Ondo routes the cash into BUIDL through BlackRock's primary issuer Securitize, and the BUIDL position sits in the fund's custody account at Bank of New York Mellon. The onchain OUSG supply expands to match. Redemptions reverse the flow, with same-day settlement available 24/7 thanks to the BUIDL primary market.
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The 2024 BUIDL migration was the operational unlock. Before the migration, OUSG redemptions depended on settling ETF trades during US market hours, capping redemption windows at one or two business days. After migration, Ondo published an instant investment and redemption mechanism that uses BUIDL's same-day primary issuance to clear subscriptions and redemptions in minutes during US banking hours, with overnight queueing outside those windows.
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Token holders interact through the Ondo dApp at ondo.finance after completing KYC through Plaid and Persona, or through approved distribution partners. The standard OUSG token accrues yield via NAV appreciation; the rOUSG variant rebases daily so wallet balances grow in token units. Both share the same underlying fund and the same redemption mechanics. Smart-contract permissioning enforces transfers only between addresses on the Ondo allowlist, so OUSG cannot move to a non-whitelisted wallet or AMM.
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Onchain, OUSG sits behind a transfer hook that checks an allowlist contract before any debit or credit. New addresses pass through Ondo's compliance review and get added in batches once attestation completes. Failed transfers revert at the contract level, which means a holder cannot accidentally send OUSG to a non-whitelisted exchange address or to a smart-contract wallet that has not been individually cleared. This is the load-bearing piece of OUSG's compliance posture and is the reason OUSG can be sold as a security to qualified purchasers without breaching the same accreditation perimeter as the underlying fund itself.
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OUSG is restricted to qualified purchasers as defined under Section 2(a)(51) of the US Investment Company Act, which requires at least $5M in investments for individuals and $25M for institutions. Non-US investors must meet equivalent professional or accredited investor standards in their home jurisdiction. The fund's posted minimum subscription is $100,000, with no maximum. Retail US investors do not qualify and should look at Ondo's other product, USDY, which targets non-US individual investors.
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Access flows through three paths. Direct subscription through ondo.finance after KYC and accreditation review. Allocation through institutional distribution partners such as prime brokers and crypto-native asset managers that hold whitelisted OUSG balances on behalf of their clients. And secondary transfers between two addresses already on the Ondo allowlist, which is rare in practice because most holders subscribe directly. The full eligibility criteria are documented in Ondo's OUSG documentation.
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OUSG yield tracks the net return of its BUIDL-backed portfolio minus Ondo's 15 basis-point management fee, which itself sits on top of BlackRock's 20 basis-point BUIDL fee. Headline yield in Q1 2026 sits in the 4 percent area, in line with short-duration US Treasury rates. Because the underlying is BUIDL, OUSG inherits BUIDL's yield profile: daily accrual, monthly payout in the underlying fund mechanics, and onchain reflection through rebasing or NAV growth.
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Yield disclosures are published in the Ondo monthly transparency report on the OUSG product page and replicated on rwa.xyz. The disclosed yield is net of all fund-level fees but before any network gas or external custody fees the holder absorbs. Yield drops in lockstep with the Fed's policy rate, which is the load-bearing factor in OUSG's pricing relative to non-yield-bearing stablecoins like USDC and USDT.
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Compared to direct Treasury ETF exposure, OUSG carries a roughly 35-basis-point all-in fee load against the 7 to 15 basis points typical of major institutional Treasury ETFs. The spread pays for tokenization, onchain transferability between allowlisted parties, the BUIDL primary connection, multi-chain deployment, and Ondo's compliance and reporting overhead. For a treasury team that already holds stablecoins onchain and would otherwise need to offramp to subscribe to an ETF, the spread is usually smaller than the round-trip banking and custody costs of going offchain.
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OUSG and BUIDL share the same underlying assets but differ in distribution, fee structure, and integrations. BUIDL is the BlackRock-issued primary token at the bottom of the stack; OUSG wraps BUIDL into a redistribution layer that adds DeFi integrations, multi-chain availability, and stablecoin-native rails. The table below summarizes the structural differences.
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The practical implication: a buyer with $5M of dry powder and an institutional mandate goes straight to BUIDL. A buyer with $100K to $5M, or one who wants the additional integrations Ondo has built around OUSG including DeFi collateral acceptance and stablecoin minting routes, uses OUSG. Ondo absorbs the operational cost of running the distribution layer in exchange for the 15-basis-point spread.
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OUSG carries the layered risks of its construction. Treasury credit risk is the floor and remains the smallest piece. Above that sit fund-structure risk in the Cayman LP wrapper, custody risk at BNY Mellon and at Securitize for the BUIDL leg, smart-contract risk on the OUSG token contracts, allowlist administration risk, and concentration risk because OUSG holds a single underlying. Anchorage and Coinbase Custody serve as approved custodians for institutional holders, but custodian failure remains a tail scenario.
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The most discussed structural risk is BUIDL dependency. A material operational failure at BlackRock, Securitize, or BNY Mellon would cascade into OUSG redemptions even though Ondo's smart contracts and team are independent. Ondo has publicly noted it can transition back to a basket of Treasury ETFs if BUIDL becomes unavailable, but that transition would not be instant. The migration announcement documents the dependency explicitly.
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Regulatory risk is the other live concern. OUSG is sold as a private fund interest under Regulation D Rule 506(c), which limits offering scope and demands ongoing compliance with US securities law. Changes in SEC interpretation of tokenized fund interests, or in CFTC treatment of stablecoin-funded subscriptions, could change the access pathways even if the underlying fund continues operating.
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OUSG's allowlist gating limits open-DeFi composability, but several permissioned integrations have launched. Flux Finance, an Ondo-affiliated lending protocol, accepts OUSG as collateral for stablecoin borrowing inside its KYC pool. Maker, now operating as Sky, holds OUSG indirectly through allocations to Morpho's Coinbase-curated KYC vault. Pendle has explored OUSG yield-stripping in its permissioned pools but no public market existed at time of writing.
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Ondo also launched USDY, a separate token that is not OUSG but consumes a similar underlying. USDY targets non-US retail buyers, has no minimum subscription, trades freely on whitelisted secondary markets in supported jurisdictions, and carries roughly $2.1B in AUM as of Q1 2026 per rwa.xyz. The pairing of OUSG for US qualified purchasers and USDY for non-US individuals lets Ondo cover most segments without unifying the wrapper.
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Looking at the broader integration story, OUSG functions as institutional collateral inside a small set of KYC'd venues rather than as a free-floating DeFi primitive. That tradeoff is by design. Ondo prioritized regulatory clarity over composability, betting that the largest pools of demand for tokenized Treasuries sit at funds, treasuries, and market makers who already operate under accreditation regimes. The 2025 to 2026 growth in OUSG AUM, from roughly $200M at the start of 2025 to ~$625M in Q1 2026 per rwa.xyz historical snapshots, supports that thesis.
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OUSG holders who need to move stablecoins across Ethereum, Mantle, and Polygon to subscribe, redeem, or rebalance can use Eco Routes to route USDC between supported chains in a single transaction. Eco does not custody OUSG or any tokenized fund interest. The product is a stablecoin transport layer that complements RWA distribution by removing the per-chain bridging step from the institutional subscription flow.
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No. OUSG is restricted to qualified purchasers under the US Investment Company Act, which requires at least $5M in investments for individuals. US retail investors should look at non-yield-bearing stablecoins or wait for retail-eligible tokenized Treasury products. Ondo's USDY is available to non-US retail buyers but is also not US-retail eligible.
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OUSG accrues yield daily as net asset value growth. The rOUSG variant rebases daily so wallet balances increase in token units rather than per-unit NAV. The standard OUSG token holds a stable count and reflects accrual through its dollar price. Both share the same fund and the same headline yield, currently in the 4 percent area before holder-side fees.
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Ondo has publicly stated OUSG can transition back to direct Treasury ETF holdings if BUIDL becomes unavailable, but the transition would not be instant. During any interim period, redemptions could be delayed or processed at NAV using cash reserves. Holders should treat BUIDL dependency as a primary structural risk per the 2024 migration disclosure.
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OUSG is deployed on Ethereum mainnet, Mantle, and Polygon as of Q1 2026 per Ondo's product page. Token addresses and bridge mechanics are documented in the OUSG developer docs. Cross-chain transfers between supported networks happen through Ondo's allowlist-aware bridge, not through permissionless bridges.
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OUSG and USDY are both Ondo products that hold short-duration US Treasury exposure, but they target different audiences. OUSG is for US qualified purchasers with a $100K minimum and BUIDL backing. USDY is for non-US individual buyers with no minimum, freely transferable inside whitelisted jurisdictions, and backed by a directly-held Treasury and bank-deposit portfolio rather than BUIDL.
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Sources and methodology. AUM, yield, and chain coverage pulled from rwa.xyz and ondofinance.com in May 2026. Fund-structure and migration details verified against Ondo's published announcements and product documentation. Figures refresh quarterly.
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OUSG is a regulated security and is not investment advice. Consult Ondo's official disclosures and a qualified advisor before subscribing.
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