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

A stablecoin savings position looks like "stablecoin, but it grows." What you hold is a value-accruing receipt token, the rate is governance discretion, and the yield is someone's protocol revenue. Each of those is a risk a treasury must price. This guide is the model behind the rate.

TL;DR

• You hold a value-accruing receipt token (sUSDS / sDAI / sUSDC) — non-rebasing; value grows, token count doesn't. sDAI = ERC-4626 wrapper of DAI in the DSR.
• Rate = Sky governance-set, variable: SSR (USDS/USDC), DSR (DAI) — a snapshot, not a contracted return.
• Yield is funded by Sky protocol revenue (loan fees, RWA incl. tokenized-Treasury exposure, deployed liquidity) — that funding is the risk.
• Risks: protocol/smart-contract, governance, revenue-durability, redemption — assessed on its own dimensions.
• Account as a value-accruing position (not cash, not rebasing — ties #165); within the yield risk budget.

What you hold: a value-accruing receipt

Depositing USDS / DAI / USDC into Spark/Sky Savings returns sUSDS / sDAI / 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 variable:

• USDS/USDC → Sky Savings Rate (SSR);
• DAI → 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; 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, not a rebasing balance: the receipt is held, its value accretes, gain generally recognised on redemption or per the jurisdiction's rules, 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.

How vendor tools handle savings receipts

Cryptio and Request Finance can track a value-accruing receipt via its exchange value rather than inventing inflows. Confirm the tool models sUSDS/sDAI as non-rebasing value-accruing positions (not cash, not rebasing) and reports allocation against policy — treating a savings receipt as a stablecoin or a rebasing balance is the recurring error.

How Wag3s helps

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.

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

• Spark/Sky Savings — deposit USDS/DAI/USDC → non-rebasing value-accruing receipt tokens sUSDS/sDAI/sUSDC (sDAI = ERC-4626 wrapper of DAI in the DSR module); value accretes, realised on redemption
• Rate is set by Sky governance and variable: Sky Savings Rate (SSR) for USDS/USDC, Dai Savings Rate (DSR) for DAI — not a contracted return
• SSR/DSR funded by Sky protocol revenue (crypto-collateralised loan fees, RWA returns incl. tokenized-Treasury exposure such as BUIDL, deployed liquidity) — funding durability is the risk; account as a value-accruing position, jurisdiction-specific