Sky Taps Osero To Unlock Idle Stablecoin Yield

Every institutional asset manager runs a cash bucket – a permanent liquidity reserve parked in money market funds, not because the return is exceptional but because idle cash must work. That behavioral norm never migrated onchain.

The yield infrastructure is there. What was missing was the distribution bridge to the hundreds of billions in stablecoins sitting idle on the other side. Osero is the bridge closing the gap.

Osero joins Sky's Prime Agent network, purpose-built to embed the Sky Savings Rate (SSR) into the wallets, neobanks and fintech platforms where stablecoins already live, turning passive balances into productive ones.

Sky builds wholesale yield infrastructure

Sky, the decentralized finance (DeFi) protocol formerly known as MakerDAO that issues the USDS and DAI stablecoins, has quietly become the highest-conviction yield infrastructure in DeFi, run with the balance sheet discipline and institutional risk management rigour the space chronically lacked.

What sets it further apart is the revenue architecture backing the yield. Stability fees on overcollateralized debt, T-bill returns captured through the Peg Stability Module (PSM) – a mechanism that holds reserves to maintain the stablecoin peg – and income from curated real-world asset (RWA) vaults run by professional asset managers give Sky a yield profile that is structurally diversified – converging into a single rate paid to sUSDS holders.

(Source: Block Analitica)

The Sky ecosystem circulates $11.1bn in stablecoins – $6.99bn in USDS, the remainder in DAI – and of that USDS supply, $5.48bn has already converted into sUSDS, the protocol's native savings token. More than three-quarters of circulating USDS are actively staked, earning the SSR rather than sitting idle. The result is the largest yield-bearing stablecoin by outstanding supply globally, ahead of tokenized money market funds, synthetic dollars and every other yield-accruing vehicle the space has produced.

USDS has become a capital sink, absorbing liquidity at scale while broader markets pull back, and is increasingly treated as the safest-yielding dollar on mainnet.

Beneath the rate sits an architecture that operates more like a wholesale bank than a DeFi protocol. Sky Core acts as the issuing desk, the layer that controls the risk framework and issuance, governs the savings rate, collects fees from borrowers and holds the emergency levers.

The SSR functions as Sky's equivalent of the Fed funds rate, a governance-set floor that determines depositor returns. Excess collateral yield above that rate accumulates in the surplus buffer. Below it, the buffer absorbs the difference until governance recalibrates.

USDS enters circulation through overcollateralized CDP vaults – smart contracts known as collateralized debt positions that lock collateral to mint stablecoins – but it reaches the market through its independent Prime Agent network – Sky's distribution partners, where specialized entities extend reach to different market segments. Each agent is optimized for a distinct segment and a distinct set of counterparties, collectively extending USDS reach into corners of the market, with mandates designed to be additive rather than overlapping.

What binds them is Sky's capital market, charging every agent a cost of capital for the liquidity it allocates. Agents that generate a margin above it survive and grow their allocation. Those that cannot are replaced by ones that can. It is Darwinian by construction, and it is what makes the agent network a genuine growth engine for USDS circulating supply rather than a loose federation of distribution experiments.

(Source: Block Analitica)

Sky's balance sheet currently stands at $15.3bn in collateral, and its composition is telling. Stablecoins are the largest single category at $5.9bn, and the $7.2bn sitting across onchain and OTC crypto lending is itself dominated by top stablecoins – making stablecoin-adjacent exposure the overwhelming majority of what backs USDS. BTC, ETH-correlated collateral and blue-chip DeFi assets fill the remainder. Strip away the labels, and Sky is, at its core, a stablecoin credit machine.

(Source: Block Analitica)

Prime Agents now account for 52% of that collateral stack, with $7.94bn of the $15.3bn balance sheet sitting under agent management rather than direct protocol control.

Spark leads the pile at $4.33bn - roughly 55% of total agent collateral although more than a third sits idle - its position built through structured credit origination and cemented when the KelpDAO exploit sent capital fleeing Aave – a major decentralized lending protocol – towards safer architecture a few weeks ago. Grove holds $2.8bn in RWA-backed deployments. Obex manages $809mn. The share of the balance sheet under agent control is rising. The Sky Frontier Foundation's $20.6bn target by year-end – roughly doubling from current levels – depends on it continuing to do so.

Prime Agents are the primary mechanism through which that gap closes, deploying Sky's balance sheet into new markets and pulling fresh USDS into circulation with every allocation mandate they win.

Osero holds the mandate none of the others do – not credit origination, not real-world asset deployment, but the distribution infrastructure that takes Sky's yield to the platforms where stablecoins already sit idle and have never once been put to work.

Osero targets idle stablecoin distribution

Osero raised $13.5mn in a round co-led by Sky Ecosystem and Plasma. The most revealing number is not the headline – it is the allocation: $10mn of that raise, 74%, is designated as a first-loss risk reserve for client deployments. Osero is not primarily a product company but an infrastructure with a balance sheet behind it.

Through a dedicated SDK – a set of programming tools for easy integration – Osero connects Sky's capital allocation network to the platforms where stablecoins already sit, such as wallets, neobanks, exchanges and fintech products. The integration partner embeds the rate. Osero handles everything underneath it. No asset management responsibility transfers. No off-chain custody involved. For a crypto-native wallet or a fintech treasury team, the integration surface is an order of magnitude smaller than any competing yield product on the market. 
 

The market Osero is entering is wide open. The B2B2C DeFi-native quadrant – where yield reaches end users through platform embeds rather than direct protocol interaction – is nearly empty. Fireblocks Earn occupies a slice of it for institutional idle capital, but the dominant players across the yield infrastructure space anchor themselves in the RWA and T-bill quadrant, bringing with them compliance overhead, banking relationships, and integration timelines measured in months. Osero asks none of that. The Stablewatch incubation, a leading stablecoin yield intelligence platform, and Sky's balance sheet backing credibility open conversations that pure DeFi protocols typically cannot reach until much later in their development.

The yield alternatives make the case by failing it. Lending pools and vaults hand depositors curator risk, protocol exploit exposure, and yields that compress precisely when the risk premium should be highest – the KelpDAO cascade showed how fast that asymmetry resolves against lenders when something breaks.

Tokenized money market funds offer a cleaner profile but gate retail and crypto-native SMEs behind institutional custody requirements. Yield-bearing stablecoins backed by real revenue are the closest substitute, but without distribution infrastructure, they remain inaccessible to the platforms where most stablecoin balances actually sit. Osero is that infrastructure.

The recent Hyperliquid AQAv2 analogue sharpens the economic logic. $5bn in idle USDC that previously generated zero protocol revenue now routes yield back through Circle and Coinbase, producing an estimated $135–160mn annually for the exchange. Coinbase and Circle each committed $20mn in HYPE tokens to activate the arrangement, and the willingness to stake that much to monetize the idle float is the clearest available signal that the market is real and the economics work.

Dead money measured at scale

The scale of the opportunity is not a projection and is already observable onchain. Across five stablecoins representing roughly 91% of total stablecoin supply, $174.3bn sits idle in externally owned wallets (EOA) not generating any value. That is 62.9 cents of every dollar in circulation, parked in addresses with no yield exposure, no DeFi deployment and no savings instrument of any kind.

(Source: Steakhouse Financial)

According to Steakhouse Financial data, the headline opportunity needs to be discounted through practical adoption constraints before it becomes a realistic TAM. A significant portion of that EOA pool is not idle retail or institutional capital, but exchange and issuer infrastructure that attribution tools have not yet labelled.

In addition, a Range report says Binance runs dozens of USDT addresses with round-number balances. Coinbase Prime clusters USDC across identically-sized cold wallets. These positions are reachable only through platform-level deals with the exchanges themselves, a different GTM motion entirely from Osero's most directly embedded play. Stripping identified CEX and issuer cold storage removes $14.3bn from USDC and $63.1bn from USDT, leaving remainders of $24.6bn and $68.7bn respectively – making it an upper bound TAM of 96.9bn.

Yet, USDT requires further adjustment. The latter is an exchange settlement instrument by design, not savings – and onchain behaviour reflects that. Removing bridges and other irrelevant deployments, USDT has deployed 3.9% of its supply into DeFi, compared with 12.9% for USDC, a penetration gap that reveals a revealed preference for yield-seeking behaviour.

Applying that ratio as a conversion probability discount to the USDT remainder produces a yield-adjusted figure of $20.5bn. What remains across USDC, yield-adjusted USDT, and the smaller stablecoins – GHO, PYUSD, USDS – is an addressable pool of $48.7bn. Custodians, funds, DAOs, fintechs, SME treasuries, neobank customer bases and retail self-custody wallets: the platforms with the strongest operational incentive to deploy idle balances without acquiring asset management risk.

At 1% penetration, Osero is managing $487mn in deployed USDS. At 5%, $2.4bn – a figure that, if Osero accounts for 20% of prime agent collateral at that scale, sits squarely within Sky's year-end supply target.

Built to compound

The geographic dimension matters. The GENIUS Act bars fiat-backed issuers from paying yield directly to holders – a structural tailwind for sUSDS, which sits outside that prohibition. For US-regulated neobanks, however, a different constraint applies, given passing SSR yield directly to customers raises securities law questions, routing the distribution motion through investment product wrappers or activity-reward structures instead.

Outside the US, that friction does not exist. LatAm, APAC, MENA, and EU neobanks operate without an equivalent yield prohibition, and their customer bases already demonstrate the stablecoin adoption intensity that makes embedded yield a natural next product layer. For neobanks in those regions, stablecoin yield is the next margin layer, a revenue line sitting one integration away.

The Foundry product extends the ceiling further, onboarding asset managers, fund issuers, and structured product providers onto the same balance sheet infrastructure, pushing Osero's addressable market well beyond the distribution layer it enters. Each product expands the addressable surface beyond the one before it – from embed, to direct consumer access, to institutional origination.

The pipeline is coherent; the balance sheet behind it is credible, positioning Osero to enter a large, underpenetrated opportunity with a product suite purpose-built to compound within it. Governance volatility in DeFi protocols remains a key risk for participants.