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Live since September 4, 2026. The rate shown in the app is the distribution vesting right now, annualised; it is what is being paid, never a forecast.
The sdUSD coin: an engraved sd over USD, ringed by laurel

sdUSD — the staked Denar dollar.

sdUSD is where the reserve’s earnings go. Stake dUSD, receive vault shares at the going price, and every harvest from then on raises what a share is worth. Unstake whenever you like — there is no lock and no cooldown.

Why unstaked dUSD earns nothing

This is the system’s engine, so it is worth saying without spin: the reserve earns on every dUSD in circulation, but pays only the staked ones. A dUSD sitting in a wallet, a liquidity pool, or a collateral position contributes its share of reserve income to the stakers who opted in. The more dUSD lives its life as a dollar, the higher the staking rate sits above the reserve’s raw yield. That is the same architecture used by the largest reserve-backed dollars in DeFi — a base token that stays boring, and a staking wrapper that concentrates the yield.

The seven-day drip

Harvested rewards are not credited at once. Each distribution is transferred into the vault and vests linearly over seven days; a new distribution folds any still-unvested remainder into a fresh seven-day round, so the share price is a smooth, continuous line rather than a staircase. With frequent harvests the tail is continuously re-vested rather than ever dropping, so there is never a step to snipe. The seed earns its own small slice of every distribution, which nobody can withdraw: rewards are only accepted while real stakers hold at least 95% of the vault, so that slice never exceeds 5%. The consequences are exactly the ones you would want:
  • No sandwich. Staking one block before a harvest captures nothing instant — you collect only your pro-rata slice of the drip for as long as you stay.
  • No cliff on exit. Unstaking mid-drip pays the vested share price at that moment; nothing you have already accrued can be taken back, and nobody is ever held in while a drip finishes.
  • Multiple payers, no coordination. The T-bill harvest and the lending harvest land whenever they are ready; the vault folds them together.

Mechanics worth knowing

What the rate will look like

No number is promised, but the shape is knowable: the staking rate is the reserve’s net income divided by the staked fraction of supply. Reserve income today means the net T-bill rate on the SGOV sleeve plus borrower interest on the vault sleeve; the staked fraction is the market’s choice. The app will show the realized rate, computed from what was actually distributed — the only version of an APY Denar is willing to print.