USDY: The Yield-Bearing Token Backed by Treasuries
USDY pays holders the yield on short-term US Treasuries while moving like a stablecoin onchain. Here is how the token is structured, who can use it, and why the design matters.
USDY is a token that looks like a dollar stablecoin but pays you the interest that a stablecoin keeps for itself. Issued by Ondo Finance, USDY (short for US Dollar Yield token) is backed by short-term US Treasuries and bank deposits, and its price is designed to climb over time as that collateral earns yield. According to Ondo's own documentation, USDY is a tokenized note secured by those assets, not a stablecoin pegged to exactly one dollar.
That distinction sits inside a fast-growing category. According to Allium's crosschain RWA dataset (as of September 7, 2026), tokenized Treasuries and money market funds account for $17.3B of the $33.4B in real-world assets now onchain, the single largest RWA vertical by value.
Key takeaways
- USDY is a yield-bearing token from Ondo Finance, backed by short-term US Treasuries and bank deposits, structured as a note rather than a one-dollar stablecoin.
- Its value accrues over time, so a holder earns yield by simply holding the token, without staking or claiming.
- USDY is not available to US persons, a direct result of its securities-style structure and the disclosures Ondo publishes.
- Tokenized Treasuries and money funds now sit at $17.3B onchain, the largest RWA category, and the broader RWA market grew roughly 175% over the trailing year to $33.4B, per Allium's dataset.
- USDY competes with a group of tokenized Treasury products that make different trade-offs between yield accrual, rebasing, and who is allowed to hold them.
The stablecoin that hands you the interest
A conventional dollar stablecoin holds reserves, often in Treasuries, and keeps the interest those reserves generate. The holder gets a stable dollar and no yield. USDY inverts that arrangement. The collateral still sits in Treasuries and deposits, but the return flows to the token holder through a rising token value.
Ondo offers USDY in two forms described in its product materials. Standard USDY is an accumulating token whose redemption value rises as yield accrues, so one USDY is worth progressively more than one dollar. rUSDY is a rebasing version that keeps a price near one dollar and instead increases the number of tokens in your wallet. Same economics, different mechanics, chosen to fit how a given protocol or treasury expects a balance to behave.
Why care about the difference? An accumulating token is simpler for accounting and cleaner for smart contracts that dislike a changing supply. A rebasing token slots more naturally into applications that assume a stable unit price. The choice determines how easily USDY plugs into lending markets, DEX pools, and onchain treasuries.
Why yield-bearing tokens are having a moment
For most of crypto's history, the risk-free rate lived offchain. When US Treasury yields climbed, the opportunity cost of holding an idle stablecoin became impossible to ignore. Tokenized Treasury products emerged to close that gap, letting onchain capital earn something close to the government rate without leaving the chain.
USDY is one of the more visible entries in that shift, alongside products such as BlackRock and Securitize's BUIDL and Franklin Templeton's BENJI, each documented by its own issuer. The growth is not marginal. Allium's dataset shows the total RWA market rising from $12.2B to $33.4B over the trailing year, with tokenized Treasuries and money market funds leading at $17.3B. For context on where the rest sits: tokenized commodities like gold at $4.6B, private credit and corporate debt at $4.4B, private funds at $3.9B, tokenized equities at $3.2B, and real estate at $0.1B.
The reason this matters for a USDY holder is composability. A yield-bearing token that behaves like cash can be posted as collateral, paired in a liquidity pool, or held in a DAO treasury, all while the underlying Treasuries keep earning. That is capital that used to sit idle now doing two jobs at once.
How USDY works, step by step
- Deposit. An eligible investor sends US dollars or an approved stablecoin to Ondo and completes onboarding, including identity checks, per Ondo's disclosures.
- Collateralization. Ondo allocates the funds to short-term US Treasuries and bank deposits that back the token.
- Minting. After a waiting period defined in Ondo's terms, USDY is minted to the investor's wallet.
- Yield accrual. The token's redemption value (standard USDY) or token count (rUSDY) grows daily as the collateral earns interest.
- Transfer and use. Once held, USDY moves peer to peer and into supported DeFi applications, carrying its accrued value with it.
- Redemption. An eligible holder redeems USDY back to dollars at its current value, subject to Ondo's redemption terms.
What the yield looks like on real money
Because USDY accrues value rather than paying a coupon, the return shows up as a rising redemption price. The table below illustrates how a hypothetical accumulating token behaves at different annual yields on a $10,000 position, before any fees or spreads. These are illustrative figures to show the mechanic, not a quoted rate.
| Annual yield | Value after 1 year | Value after 2 years | Yield earned (year 1) |
|---|---|---|---|
| 4.0% | $10,400 | $10,816 | $400 |
| 4.5% | $10,450 | $10,920 | $450 |
| 5.0% | $10,500 | $11,025 | $500 |
| 5.25% | $10,525 | $11,078 | $525 |
The concrete contrast with a plain stablecoin: on that same $10,000, a non-yield stablecoin returns exactly $10,000 after a year. The interest the reserves earned went to the issuer. With a yield-bearing token, that spread lands in the holder's balance instead. Over two years at 5%, the difference is roughly $1,025 that would otherwise have been left on the table.
USDY versus other tokenized cash instruments
The tokenized Treasury field is not one product repeated. Issuers differ on accrual mechanics, eligibility, and structure. The comparison below is qualitative and drawn from each issuer's own materials.
| Feature | USDY (Ondo) | Plain fiat stablecoin | rUSDY (Ondo rebasing) |
|---|---|---|---|
| Pays yield to holder | Yes | No | Yes |
| Price behavior | Rises over time | Pegged near $1 | Held near $1 |
| Yield delivery | Accruing value | None | More tokens |
| Backing | Treasuries + deposits | Varies by issuer | Treasuries + deposits |
| US persons eligible | No | Often yes | No |
Concrete benefits, stated plainly
- Idle cash starts earning. Before, onchain dollars held for liquidity earned nothing. With USDY, the same balance accrues Treasury-linked yield while remaining transferable.
- No claiming step. Before, yield products often required staking or a manual claim. USDY's value grows in place, so a holder does not have to interact with a contract to capture return.
- Round-the-clock movement. Before, moving into a money market fund meant business hours and settlement delays. USDY transfers whenever the chain is running.
Reading USDY activity across chains
USDY is deployed on more than one blockchain, and its balances move between wallets, lending markets, and liquidity pools. Answering a straightforward question, such as how much USDY is held onchain versus locked in a specific protocol on a given day, is deceptively hard. Each chain records a USDY transfer in its own format. A mint on one network, a rebase event, a bridge transfer, and a DEX swap all need to resolve to the same underlying fields before they can be summed: asset, issuer, holder, amount, USD value, and transaction type. Without that, the accrued-value mechanic alone can make a naive balance count wrong.
This is the normalization problem Allium is built to solve. Allium ingests raw data from 150+ blockchains and standardizes tokenized asset activity into consistent records, so a USDY holding resolves to the same schema whether it sits on Ethereum, Solana, or another network. That is the same data behind Allium's RWA datasets, the source of the $17.3B tokenized Treasury figure above.
Risks and open questions
- Eligibility is a hard gate. USDY is not available to US persons. That restriction, tied to its securities-style structure, limits who can hold it and reduces its reach compared with open stablecoins.
- Redemption is not instant. Minting and redeeming involve waiting periods set in Ondo's terms. USDY moves freely between wallets, but converting back to dollars runs on the issuer's schedule.
- Yield is not fixed. The return tracks short-term rates. When Treasury yields fall, so does the accrual, and USDY carries no guarantee of a particular rate.
- Counterparty and collateral risk. Holders rely on Ondo to hold and manage the backing assets as disclosed. That introduces issuer and custody risk that a self-custodied asset does not have.
- Regulatory trajectory. Tokenized Treasuries sit at the edge of securities law in several jurisdictions. How rules settle will shape which products can be offered, to whom, and where.
USDY is a clean expression of a larger idea: onchain dollars can carry the risk-free rate with them. Whether that idea belongs to USDY specifically or to the broader $17.3B tokenized Treasury category, the direction is the same. Cash that used to sit still is starting to work.
Frequently asked questions
Is USDY a stablecoin?
Not in the strict sense. USDY is structured by Ondo Finance as a yield-bearing note backed by short-term US Treasuries and bank deposits. Standard USDY rises in value over time rather than holding a fixed one-dollar price, though the rebasing version (rUSDY) is designed to stay near one dollar while increasing token count.
How does USDY pay yield?
The collateral behind USDY (Treasuries and deposits) earns interest, and that return flows to the holder. With standard USDY, the token's redemption value increases daily. With rUSDY, the balance in your wallet grows. There is no separate claiming or staking step.
Can US residents hold USDY?
No. Per Ondo's disclosures, USDY is not available to US persons, a restriction tied to its securities-style structure. Eligibility and onboarding requirements are set out in Ondo's own terms.
What backs USDY?
According to Ondo's product materials, USDY is secured by short-term US Treasuries and bank deposits. Holders rely on Ondo to hold and manage those assets as disclosed, which introduces issuer and custody risk.
How large is the tokenized Treasury market?
According to Allium's crosschain RWA dataset (as of September 7, 2026), tokenized Treasuries and money market funds total $17.3B onchain, the largest single RWA category. The overall RWA market reached $33.4B, up roughly 175% over the trailing year.
What is the difference between USDY and rUSDY?
They share the same economics but differ in mechanics. Standard USDY is an accumulating token whose price rises as yield accrues, which suits accounting and smart contracts that expect a fixed supply. rUSDY is a rebasing token that stays near one dollar and increases the number of tokens you hold, which fits applications assuming a stable unit price.
