US20Y

BondsLive

Tokenized US Treasury 20-Year Bond

Tokenized US Treasury 20-Year Bond, fixed-income exposure with coupons reinvested to NAV.

See US20Y on /markets →Underlying ticker: US20Y

Key facts

On-chain symbol
US20Y
Underlying
US20Y
Asset class
Bonds
Custody
Held at Flo Finance
Chains
Base, Arbitrum, Ethereum
Distribution treatment
Coupon reinvested to NAV
Attestation cadence
Daily
Issuer
Flo Finance
Backing
1:1 backed by the real underlying

How US20Y resolves to US20Y

Each US20Y on-chain represents a 1:1 claim on the underlying US Treasury 20-Year Bond held at an institutional custodian. The issuer and backing model are the same for every Flo token; only the underlying differs.

  1. 01

    Issuance

    Flo Finance issues US20Y as a tokenized US Treasury 20-Year Bond, 1:1 backed by the real underlying.

  2. 02

    Custody

    The underlying US Treasury 20-Year Bond is held at Flo Finance, an institutional custodian.

  3. 03

    Settlement

    US20Y settles on-chain on Base, Arbitrum, Ethereum. Cross-chain transfers route through Chainlink CCIP.

  4. 04

    Attestation

    Reserves are attested daily by an independent auditor and published on the Flo transparency surface.

Mint US20Y with one SDK call

Every Flo-issued token shares the same six SDK methods. Mint, redeem, supply, withdraw, borrow, repay.

POST /v1/mint

{
  "asset": "US20Y",
  "notional_usdc": "1000.00",
  "slippage_bps": 50,
  "settlement": {
    "currency": "USDC",
    "chain": "base"
  }
}

Where US20Y lives today

Flo distributes through partners. The same US20Y on-chain is the asset every partner integrates against; partner UIs may relabel it for their own brand.

Partner integrations in build

No live partner is distributing US20Y yet. Twelve integrations are in build across exchanges, wallets, fintechs, neobanks, and asset managers. Partners are listed here only after they ship.

Audits

Four independent firms, $250K bug bounty

Sherlock, Halborn, Cantina, and Cyfrin have audited the smart contracts that issue and settle US20Y. The same contracts power every Flo-issued token; one audit covers the catalogue.

Read the audit reports →

Backing

1:1 backed by the real underlying

US20Y is issued by Flo Finance and 1:1 backed by real US Treasury 20-Year Bond held at institutional custodians. Reserves are attested daily and published on the Flo transparency surface.

Open the transparency page →

Risks

US20Y carries the market risk of the underlying US Treasury 20-Year Bond, plus the structural risks common to every tokenized asset: custody concentration, smart-contract risk, and oracle dependency. Read the full risk disclosures on the Flo transparency surface before integrating or holding.