What BUIDL, OUSG, and USDY actually are
All three products are designed to do the same job: put short-duration US Treasury exposure on a blockchain so crypto-native capital can earn something close to the risk-free rate without leaving the on-chain environment. The wrapper around that exposure, however, is where everything diverges.
BUIDL is the BlackRock USD Institutional Digital Liquidity Fund, launched in March 2024 on Ethereum with Securitize as the transfer agent and tokenization partner. It invests in cash, US Treasury bills, and overnight repurchase agreements, and targets a $1 token price. Yield accrues into the token itself; the share you hold grows in value rather than paying you a separate cash stream. Minimum investment is $5 million, and access is restricted to eligible non-US persons and to US persons who are qualified purchasers or accredited investors meeting extra thresholds. The product expanded to Aptos, Arbitrum, Avalanche, Optimism, and Polygon, with a portion deployed as collateral on lending markets.
OUSG is Ondo Finance's institutional tokenized US Money Market fund, backed by short-duration Treasuries and held through a Cayman-domiciled company structure. Its yield is delivered through a wrapped, rebasing token: OUSG accrues value in its base form, and a parallel token called USDY serves as the yield-bearing claim. OUSG targets $1 and is available on Ethereum and Solana, primarily aimed at institutional desks. USDY is Ondo's broader distribution arm: a tokenized note that distributes yield monthly into holders' wallets. Its minimum is far lower and its on-chain footprint wider, but US persons are restricted from the primary issuance. Both Ondo products are designed to be composable across DeFi while still living inside a regulated wrapper.
The shared design goal is what is sometimes called a "stablecoin that isn't a stablecoin": the underlying is the safest short-duration instrument in US capital markets, but the legal wrapper is a fund or note, not a payment stablecoin under the GENIUS Act framework, which we will come back to.
The real risks of tokenized Treasury funds
Marketing copy tends to flatten these products into "T-bills on-chain, what could go wrong." Several things can, and a serious comparison has to name them.
Credit risk is the smallest concern. The funds hold US Treasuries with maturities under about three months and overnight repo backed by Treasuries. The probability that the US government fails to make a T-bill payment in any quarter you care about is not zero, but it is small enough that practitioners model it as background noise. BlackRock and Ondo do not take meaningful credit risk themselves; the risk is mechanical and operational, not balance-sheet.
Custody and operational risk is the largest. Your claim sits behind an issuer, a fund administrator, a custodian bank, a transfer agent, and one or more smart contracts. If any link in that chain fails, your tokenized claim is a string of bytes that cannot reach the underlying. BlackRock uses Bank of New York Mellon as custodian for BUIDL's cash and Treasuries. Ondo uses a mix of institutional custodians for the underlying. Both products also depend on the smart contracts that mint, burn, and track the tokens. A bug in tokenization code, a compromised admin key, or a halt at the transfer agent can freeze redemptions regardless of how solvent the underlying is.
Redemption queue and liquidity risk are the under-discussed dangers. Tokenized Treasury funds promise same-day or T+1 settlement, but in stressed market conditions redemption gates can be activated, just as they have been at traditional money market funds in past crises. If a panic hits the crypto side of the market, holders may try to redeem simultaneously. The fund has to sell Treasuries and wire cash, which can take longer than a smart-contract unwind. During that gap, your token trades at a discount to NAV on secondary markets and you either accept that haircut or wait.
Depeg risk on wrapped forms is real. OUSG exists in a wrapped form on certain chains to be used as collateral in DeFi. Wrapping adds smart-contract and counterparty layers on top of the underlying fund token. In stressed conditions, wrappers can trade below the underlying, and unwrapping can be slow. If you take the wrapped version, you are taking on liquidity and redemption path risk that a direct holder does not face.
Regulatory risk is the structural one. US persons are largely walled out of primary issuance. If the SEC or CFTC changes the rules around tokenized funds, if a custodian loses a charter, or if the GENIUS Act's definition of permitted stablecoin collateral narrows, the product you hold could face a redesign, a redemption event, or a US-person wind-down. This is not hypothetical: the legal status of these tokens under US securities law is an evolving conversation, and the products themselves are priced for that uncertainty.
Yield distribution creates tax events that pure accrual does not. If you are a US taxpayer, OUSG and USDY distributions are taxable events in the year paid, even if you reinvest them. BUIDL's accrual pattern defers tax until you redeem. Same headline yield, very different after-tax behavior for taxable accounts.
How the yield actually reaches you
Yield size is where these products look similar; yield delivery is where they look nothing alike.
BUIDL accrues. There is no coupon payment, no claim to collect. Each token is designed to track $1, and the yield shows up as the fund's net asset value per token drifting upward by a small amount every day. If you hold 100 BUIDL on day one, on day 90 you hold fewer tokens worth more in dollar terms, and the accounting lives in the share price rather than in your wallet. From a composability standpoint this is elegant: your collateral stays at $1, your borrowing power does not fluctuate with payments, and there is no "what do I do with the distribution" decision. From a tax standpoint, the IRS treats the daily NAV drift as a taxable event for some structures, so this is not actually a tax-free ride.
OUSG uses a split structure. The base OUSG token accrues, and USDY is the separate token that represents the claim to the yield stream. This separation lets institutional desks treat OUSG as collateral that behaves like a stable dollar and harvest the USDY claim separately. It also means the redemption path is more complex and the depeg risk on the wrapped version is real.
USDY distributes. Each token represents a fixed amount of underlying plus a right to a monthly USDC payment that represents the prior month's yield, net of fees. You see cash land in your wallet each month. That is the most familiar pattern for a retail user, but it produces a monthly taxable event for US taxpayers, requires you to think about what to do with the distribution, and creates a slight mismatch between the time yield is earned and the time it is paid.
Net of fees, all three products cluster within a few basis points of the underlying short-Treasury rate. The reason to choose between them is access, mechanics, jurisdiction, and where the product sits under the GENIUS Act framework, not yield-shopping.
Who can actually buy them
This is the question most comparison pieces gloss over, and it is the one that determines whether a product is real for you or merely an interesting chart.
BUIDL requires eligible investors. The minimum is $5 million, and the eligible-investor definition is narrower than "accredited investor." It includes qualifying non-US persons (which generally means people who are not US citizens or residents and who are buying from outside the US), certain institutional investors, and US persons who are qualified purchasers or who meet the higher accredited thresholds. In practice, BUIDL holders are institutions, family offices, qualified individual investors, and entities registered under specific regulations. Retail US access is essentially closed.
OUSG has a similar institutional gate: KYC, accreditation, and jurisdiction checks apply through Ondo's issuance process. Minimums are lower than BUIDL but still institutional in flavor, and the token is mainly held by desks that use it as collateral or treasury.
USDY is Ondo's widest-distribution product. Minimums are modest and the onboarding flow is built for non-US individuals. US persons are still excluded from primary issuance, which means a US resident cannot complete KYC with Ondo to mint USDY directly. What US residents can do is buy USDY on a secondary market, but the legal and tax posture of a secondary-market purchase is different from primary issuance, and the yield rights may behave differently depending on how the token changes hands.
On the platform side, BUIDL has been integrated with several institutional rails, including services that allow certain eligible investors to subscribe and redeem through their existing custodian relationships. OUSG is available on Ethereum and Solana through Ondo's own interface and through partner venues. USDY has the broadest retail footprint: it lives on Ethereum, Solana, Aptos, Arbitrum, and other chains, and is supported by a range of wallets and DEXs. Buying is also possible through partners like Bitget and other exchanges that have listed USDY for non-US users.
The practical upshot: if you are a US person, none of these three are accessible at primary issuance. If you are a non-US institutional buyer, BUIDL and OUSG are both on the table. If you are a non-US retail buyer, USDY is the realistic option, and you should understand that you are buying a tokenized note with distribution risk, jurisdiction risk, and tax risk in your home country.
Where they sit under the GENIUS Act
The GENIUS Act framework, as it has been discussed in 2025 and early 2026, is aimed at payment stablecoins: tokens used to move dollars, settle transactions, or back other crypto instruments. It allows payment stablecoin issuers to back their tokens with short-duration Treasuries under specific conditions, and it creates a federal regulatory path for those issuers.
Tokenized Treasury funds like BUIDL, OUSG, and USDY are not payment stablecoins in the legal sense. They are securities: investment-company shares or notes that happen to be issued and transferred on a blockchain. That means the GENIUS Act's payment-stablecoin rules do not directly apply to them. What does apply is the existing securities framework: the Investment Company Act of 1940 for BUIDL, securities anti-fraud and disclosure rules, and the KYC, AML, and accredited-investor regime that all three products operate within.
The relevant questions for the buyer are different. Does the fund qualify as a permitted reserve asset for a payment stablecoin? Some of these products are designed to do exactly that: a stablecoin issuer holds BUIDL as backing, and the BUIDL holder's claim is on Treasuries, not on the stablecoin issuer's solvency. In that sense, BUIDL and its peers sit one layer underneath payment stablecoins under the GENIUS Act, providing the safe-asset substrate that compliant stablecoins hold against their float.
The second question is whether the tokens themselves count as permitted stablecoin collateral if used inside DeFi. That is a use-case question, not an issuer question, and it depends on the protocol's own risk framework. BUIDL is accepted as collateral on certain lending markets; USDY and OUSG are integrated into various DeFi venues. Each integration makes its own determination about which tokens it treats as safe.
The third question is jurisdictional. If you are a non-US person, the US securities framework still touches your wallet through the issuer's compliance regime. If you are a US person, you are largely outside the primary issuance market and into secondary-market and DeFi-based access paths, each with its own legal gray area.
Practical implications for the buyer
If you are choosing between these products, the decision tree looks like this.
Step one is eligibility. Are you a US person or not. If yes, primary issuance is closed, and you are looking at secondary markets, wrapped forms, and DeFi-based exposure, with the legal posture of a buyer rather than a fund shareholder. If no, you can complete KYC and access primary issuance subject to the issuer's rules.
Step two is size and use case. Are you parking $50 million in on-chain treasury? BUIDL is designed for that. Are you running a market-making or lending desk that needs a $1-stable collateral asset? OUSG's split structure is built for that. Are you an individual non-US user looking for monthly yield on stablecoin holdings? USDY is the realistic option.
Step three is jurisdiction and tax. US persons have a different tax treatment than non-US persons for each product, and distributions versus accrual produce different cash-flow patterns.
Step four is on-chain footprint. If you need Arbitrum or Optimism exposure, BUIDL's multi-chain presence matters. If you live on Solana, OUSG's availability there matters. If you want the widest retail-chain coverage, USDY's footprint is broadest.
Step five is your exit. How quickly can you redeem at par? What happens to the price of the secondary-market token if the fund gates redemptions? Where does the wrapped version trade during stress? These are not academic questions; they are the difference between a 5% yield and a 5% yield plus a 3% haircut that takes six months to recover.
Comparing the three side by side
Issuer: BUIDL is issued by BlackRock, the world's largest asset manager. OUSG and USDY are issued by Ondo Finance, a tokenized-asset specialist. Both issuers rely on established institutional partners for custody, administration, and transfer-agent functions.
Underlying: All three hold cash, US Treasury bills, and overnight repo backed by Treasuries, with weighted average maturities measured in weeks.
Yield mechanism: BUIDL accrues into NAV. OUSG accrues into NAV in the base form, with USDY carrying the claim stream separately. USDY distributes monthly USDC.
Access: BUIDL and OUSG are institutional. USDY is the most retail-accessible of the three, but still excludes US persons from primary issuance.
Chains: BUIDL has expanded across Ethereum, Aptos, Arbitrum, Avalanche, Optimism, and Polygon. OUSG is on Ethereum and Solana. USDY has the broadest multi-chain footprint, including Ethereum, Solana, Aptos, and Arbitrum.
Minimum: BUIDL is $5 million. OUSG minimums are institutional but lower. USDY has the lowest minimum and is the only one realistically accessible to non-US retail buyers.
Use case: BUIDL is the institutional reserve asset and stablecoin backing. OUSG is the institutional collateral token. USDY is the broader distribution and retail yield product.
Risk profile: All three have near-zero T-bill default risk and meaningful operational, custody, redemption, and regulatory risk. The biggest differentiator is which combination of those risks you can stomach and which you can price into your decision.
Follow tokenized T-bill funds with the right signal
Tokenized Treasury funds move with Treasury yields, with crypto liquidity conditions, and with regulatory news, and those three drivers do not always point the same direction. A jump in the T-bill yield, a stablecoin-issuer's reserve disclosure, a SEC comment letter, or a redemption queue incident at any one of these funds can move the price and the narrative within hours. Tracking those signals manually means reading dozens of feeds and trying to tell policy news from protocol noise. Zippfeed surfaces tokenized-fund headlines with sentiment scoring (bullish, neutral, or bearish) and an importance rating, so you can spot the signals that actually move these products before they show up in your wallet.
