Stablecoin Savings-Rate Yield for Treasury: The Receipt Token and Its Source

This article is about the savings-rate instrument specifically — the kind where you deposit USDS or DAI and hold something like sUSDS or sDAI. It looks like "a stablecoin, but it grows." Three things make that appearance misleading, and each is a risk a treasury has to price: what you hold is a value-accruing receipt token (not a balance that ticks up), the rate is set at governance discretion (not a market clearing price like DeFi lending utilization), and the yield is funded by someone's protocol revenue (not a fund or bank obligation, as with a regulated tokenized T-bill). The model behind the rate is the scope here; how its variability compares to locking a fixed rate is the fixed vs variable decision.

In short

• You hold a value-accruing receipt token (sUSDS, sDAI, sUSDC) — non-rebasing: value grows, token count does not. sDAI is an ERC-4626 wrapper of DAI in the DSR.
• The rate is Sky-governance-set and variable: the Sky Savings Rate (USDS/USDC) or Dai Savings Rate (DAI) — a snapshot, not a contracted return.
• Yield is funded by Sky protocol revenue (loan fees, RWA including tokenized-Treasury exposure, deployed liquidity) — that funding source is the risk.
• Risks: protocol/smart-contract, governance, revenue durability, redemption — assessed on their own dimensions.
• Account as a value-accruing position, not cash and not rebasing (ties to rebasing vs non-rebasing tracking), within the yield risk budget.

What you hold: a value-accruing receipt

Depositing USDS, DAI, or USDC into Spark/Sky Savings returns sUSDS, sDAI, or sUSDC — non-rebasing tokens whose value increases over time as yield accrues, rather than the token count changing. sDAI is an ERC-4626 wrapper of DAI in the Dai Savings Rate module. The position's growth is in the receipt's value, realised on redemption — the wstETH model class, not the stETH rebase one (the rebasing-vs-non-rebasing distinction, at treasury scale).

The rate is governance discretion

The rate is set by Sky governance and is variable:

• USDS/USDC earns the Sky Savings Rate (SSR);
• DAI earns the Dai Savings Rate (DSR).

It is not a contracted return — it is a governance-set parameter that has moved materially over time. A treasury relying on it accepts a discretionary, variable rate, and any displayed figure is a snapshot, not a promise. Do not plan as if it were fixed (the variable side of the fixed-vs-variable choice).

Where the yield comes from is the risk

The SSR/DSR is funded by Sky protocol revenue — broadly crypto-collateralised loan fees, real-world-asset returns (which have included tokenized-Treasury exposure such as BUIDL), and deployed liquidity. That funding source is the risk: the yield depends on the protocol's revenue and governance choices remaining sound, not on a bank or fund obligation to you. The savings rate is as durable as the protocol economics behind it — diligence the source, not just the rate.

The risk profile

Generally a different profile from a regulated tokenized T-bill fund — neither strictly higher nor lower by default; assess on its own dimensions within the risk budget.

Accounting

Account as a value-accruing crypto-asset position — not cash, and not a rebasing balance: the receipt is held, its value accretes, gain is generally recognised on redemption or per the jurisdiction's rules, and the whole position is reconciled with an audit trail. The rebasing-vs-non-rebasing distinction matters: a value-accruing receipt is tracked via its exchange value, not invented inflows. Confirm tax characterisation per jurisdiction.

Practical guidance

1. Know you hold a value-accruing receipt (sUSDS/sDAI) — non-rebasing, not cash.
2. Treat SSR/DSR as governance discretion — variable snapshot, not a promise.
3. Diligence the yield's funding source (protocol revenue) — that is the risk.
4. Assess on its own risk dimensions vs other yield rungs.
5. Account via exchange value, gain on redemption, jurisdiction-specific.
6. Bound the allocation within the policy yield risk budget.

Choosing a tool that models the receipt correctly

Treating a savings receipt as a stablecoin, or as a rebasing balance that invents daily inflows, is the recurring error. Tools like Cryptio and Request Finance can track a value-accruing receipt via its exchange value, but the modelling default is what to verify. Before relying on one, confirm the tool:

• models sUSDS/sDAI/sUSDC as non-rebasing value-accruing positions, recognising growth through the exchange rate rather than fabricating receipt-token inflows;
• keeps the position distinct from cash and from the underlying stablecoin;
• reports the allocation against the treasury's policy limit for this yield rung.

A tool that books the receipt at $1 face value, or that treats the accrual like a rebasing token's new balance, will misstate both the carrying value and the income.

How Wag3s handles it

Wag3s Ledger models savings receipt tokens (sUSDS/sDAI/sUSDC) as non-rebasing value-accruing positions tracked by exchange value, distinct from cash and from stablecoins, with gain on redemption and policy-allocation reporting on the audit trail. See the Ledger product page and the Wag3s for accountants page.

Worked example: sDAI accounting entries at period end

A treasury deposits 500,000 DAI into the Sky Savings Rate module on 1 January 2026. It receives 476,190 sDAI (the exchange rate on that date is 1 sDAI = 1.05 DAI, so 500,000 ÷ 1.05 = 476,190.48 sDAI).

Day 1 — Deposit entry.

• Debit: DeFi Savings Position – sDAI (476,190 units) $500,000
• Credit: Cash/Stablecoin – DAI $500,000

Note: the position is recorded at the cost of DAI deposited ($500,000), not at the number of sDAI units times the $1 face value. The entry reflects economic reality: 500,000 DAI was deployed, and 476,190 sDAI was received as the receipt representing that deployment.

31 January 2026 — Period-end remeasurement. After 30 days, the DSR has been earning approximately 5.8% annualised. The sDAI/DAI exchange rate has moved from 1.05000 to 1.05484 (an increase of 0.00484 per sDAI). The position value is now: 476,190 × 1.05484 = $501,829.

The accrued income for January: $501,829 − $500,000 = $1,829.

If the entity applies a fair-value model:

• Debit: DeFi Savings Position – sDAI $1,829
• Credit: Stablecoin Savings Income $1,829

If the entity applies a cost model:

• No remeasurement entry during the period; income is recognised only on redemption.

The choice of model is framework-specific and auditor-confirmed. For a treasury whose primary concern is income statement accuracy over short reporting periods, the fair-value approach captures yield in the period earned. For a treasury that wants simplicity and is comfortable with book value tracking, cost-plus-redemption works — at the cost of income-statement accuracy.

15 March 2026 — Partial redemption. The treasury redeems 238,095 sDAI (half the position) for DAI. At redemption, the exchange rate is 1 sDAI = 1.0601 DAI.

Proceeds received: 238,095 × 1.0601 = $252,405 DAI

Under the fair-value model, the carrying value of 238,095 sDAI is $250,980 (half of the most recent remeasured balance of approximately $501,960 at redemption date). The redemption gain at the remeasurement date is $252,405 − $250,980 = $1,425 — not the full gain from inception, which was already recognised through periodic remeasurement.

Under the cost model, the carrying value is the original cost of 238,095 sDAI = $250,000 (half the initial $500,000). The full gain on redemption is $252,405 − $250,000 = $2,405 — recognised in full at the redemption date.

The governance-rate risk in practice

The DSR and SSR are not set-and-forget parameters. Sky governance has adjusted them multiple times in response to market conditions. In 2023, the DSR was at 1%; by mid-2024 it had reached 8%; by early 2025 it had been reduced again. A treasury that allocated 30% of its reserves to sDAI at 8% DSR and then saw the rate drop to 3% may have been better served by a fixed-rate tokenized T-bill for the same period.

The specific risk for treasury planning: the DSR/SSR is voted on by MKR/SKY governance token holders, who may have interests that do not align with a depositor's preferred rate stability. A governance vote can reduce the rate immediately with no notice period for existing depositors. By contrast, a 90-day tokenized T-bill has a fixed yield for its term — the rate risk is removed for that duration, though the credit risk profile differs.

For a treasury that needs to budget yield for a defined period (e.g. to fund a quarterly grants cycle), a fixed-yield instrument is structurally preferable to a governance-variable one, regardless of which displays a higher APY at any given moment. The stablecoin savings rate is best suited to floating reserves where the yield is a bonus rather than a budget line.

Further reading

• Crypto Treasury Yield Strategy
• Rebasing vs Non-Rebasing Token Tracking
• Lido stETH vs wstETH Tracking
• DeFi Lending Yield for Treasury
• Fixed vs Variable Yield for Treasury
• Tokenized Treasury Bills for Yield

Sources

• Sky — sUSDS token (Sky Protocol developer docs): sUSDS is the ERC-4626 tokenized implementation of the Sky Savings Rate for USDS; sDAI is the equivalent ERC-4626 receipt for the Dai Savings Rate.
• Sky — Sky Savings Rate (sUSDS): the SSR is set by governance vote and is funded by Sky protocol revenue — fees from crypto-collateralised loans, investments into US Treasury bills, and liquidity provisioning — which is why the rate is variable and its durability depends on those revenue sources.
• Tax characterisation of the accrued yield is jurisdiction-specific and is not covered by the protocol documentation; confirm it with a qualified adviser.