Park balances.
Earn t-bill yield.
A dedicated account that pays the prevailing US Treasury bill rate on idle balances. Backed 1:1 by USDtb, the tokenised t-bill stablecoin from Ethena, custodied through Anchorage Digital. Deposit any fiat or crypto Nxos supports. Withdraw any time, no lock-up.
Deposit fiat or crypto.
Yield accrues underneath.
When you fund the yield account, Nxos converts the deposit 1:1 into USDtb, a fully reserved stablecoin issued by Ethena and backed by short-duration US Treasury bills (held via BlackRock’s tokenised money-market fund, BUIDL). The reserves sit at Anchorage Digital, a federally chartered US crypto bank.
Deposits accept any fiat or crypto Nxos already supports. USD, HKD, SGD, AED, CHF on the fiat side. USDC, USDT, and other supported stablecoins on the crypto side. Each converts to USDtb at par at the moment of deposit.
Yield accrues by the second. The balance climbs continuously, the same way a money-market fund accrues interest, just visible in real time. When you want the dollars back, you swap out at 1:1. No redemption window, no exit fee. You never have to interact with USDtb directly.
What you earn is what t-bills earn,
minus a small slice.
The gross yield on the account is the rate USDtb publishes, currently sitting at the short end of the US Treasury curve. Nxos takes a flat 10 bps off the top. No subscription, no minimum, no exit fee.
The gross rate floats with the t-bill curve. The Nxos slice is flat. When t-bill yields rise, accruals rise. When they fall, accruals fall.
Three line items.
Move funds from any Nxos balance into the yield account at par. No conversion spread, no transfer fee.
Move funds back at par, the moment you want them. Settles instantly to the destination account. No notice period.
Taken from the gross APY published by USDtb. Already netted into the rate quoted to you. Not shown as a separate line item.
No minimum balance. No subscription. No lock-up. No exit penalty.
In the product
The yield account is a regular balance inside the same Nxos dashboard you already use. Click any row for a closer look.
T-bill yield, on a regulated stack
T-bills are short-dated debt issued by the US Treasury, the standard reference for low-risk dollar yield. USDtb is the wrapper that makes those t-bills accessible on the same rails as your other Nxos balances.
Short-duration (typically 1 to 3 month) debt issued and guaranteed by the US Treasury. The reserves backing USDtb hold t-bills via BlackRock’s tokenised money-market fund, BUIDL.
- Backed by the full faith and credit of the US Treasury
- Mark-to-market daily; reserves are over-collateralised
- BUIDL reserves audited and reported monthly
A 1:1 USD-pegged token issued by Ethena. Reserves are held exclusively in BUIDL and overnight cash equivalents. No derivatives, no perpetuals, no exotic collateral. The yield paid to holders is the yield on the t-bills behind it, minus issuance costs.
- 1:1 fully reserved, daily attestations
- Mint and redeem at par with eligible counterparties
- Distinct from USDe: pure t-bill exposure, no funding-rate dependency
A federally chartered US national bank (OCC-regulated) and the qualified custodian for USDtb’s reserves and for Nxos’s institutional positions. The same rails US asset managers use to hold tokenised treasuries.
- OCC-chartered national trust bank
- SOC 1 Type 2 and SOC 2 Type 2 audited
- Bankruptcy-remote custody of customer reserves
$1,000,000 idle in the yield account.
~$41,500 a year, hands-off.
The same dollars that would sit in a non-interest operating account, working at the t-bill rate. No portfolio to manage, no roll, no early-redemption penalty if the cash needs to come back tomorrow.
The math is symmetric in either direction. If t-bill yields fall, accruals slow. If they rise, accruals speed up. What you earn is the t-bill rate, minus 10 bps.
- Balance held
- $1,000,000 USD
- Held as
- USDtb (1:1)
- Period
- 1 year, hands-off
- Daily accrual
- ~$114
- Monthly accrual
- ~$3,458
- Annual accrual
- ~$41,500
Common questions
Is this a yield-farming product?
No. The yield comes from short-dated US Treasury bills held in reserve, not from lending, leverage, derivatives, funding rates, or staking. The same instrument the short-end of any conservative dollar portfolio holds.
How is the yield credited?
Continuously. The balance on the yield account climbs by the second, tracking the gross USDtb rate net of the 10 bps Nxos fee. No monthly payout, no claim step, nothing to opt into. When you withdraw, you receive principal plus everything accrued to that moment.
What can I deposit?
Any fiat or crypto Nxos supports. USD, HKD, SGD, AED, CHF, and EUR on the fiat side. USDC, USDT, and other supported stablecoins on the crypto side. Each converts to USDtb 1:1 at deposit. The withdrawal side is symmetric.
What’s the minimum balance?
Zero. Open the account empty, fund it whenever, withdraw to empty whenever. No tier system, no minimum-to-earn threshold. One dollar accrues the same rate as ten million.
What happens to my money if Nxos disappears?
The reserves backing USDtb are held in bankruptcy-remote custody at Anchorage Digital, on the customer’s account, not Nxos’s. USDtb itself is redeemable directly with Ethena for the underlying t-bills. The value lives at the regulated custodian, not on a Nxos balance sheet.
Can I lose money?
The principal exposure is to short-dated US Treasury bills, the standard reference for low-risk dollar holdings. Yields fluctuate, so the accrual rate changes, but the instruments themselves are full-faith-and-credit US government debt. There is no peg-break risk of the kind algorithmic or under-collateralised stables carry.
How does this differ from USDe?
USDe (also Ethena) earns yield from delta-neutral derivatives. Its rate moves with crypto funding rates. USDtb is pure t-bills only, no derivatives leg. The trade-off: lower headline yield than USDe in high-funding regimes, a simpler risk profile, and full pass-through of whatever the US Treasury pays on short-term debt.
Tax reporting?
Yield accrued is income in most jurisdictions. Statements are generated annually and available to download from the dashboard. Specific treatment depends on your domicile; check with your accountant.
Open a yield account
The account is one click from any Nxos dashboard. New to Nxos? Open one first and the yield account is available right after.