The stablecoin market through 2024 was structurally simple: USDT and USDC dominated by market capitalisation, both held their pegs to the dollar through reserves of cash and Treasury bills, and the interest earned on those reserves was retained by the issuers as revenue. Holders earned no yield on their stablecoin balances; the issuer captured the float economics.
By 2026, this structure has been substantially disrupted by a wave of yield-bearing stablecoin products that share part or all of the reserve interest with token holders. Ethena’s USDe and sUSDe combine the dollar peg with a basis trade yield that has reached double-digit annualised returns in favourable conditions. Sky Protocol (formerly Maker)’s USDS distributes protocol surplus to holders who lock their USDS in the savings rate module. Ondo Finance’s USDY explicitly pays Treasury bill yield to holders structured as a regulated security. PayPal’s PYUSD and several other regulated stablecoin products have introduced yield-sharing mechanisms in different jurisdictional structures. This competitive dynamic has become what crypto Twitter calls the “stablecoin yield wars.”
Understanding which yield mechanisms are sustainable, which are vulnerable to specific market conditions, and which carry hidden risks that the yield headlines do not disclose is the analytical work that distinguishes informed stablecoin participation from naive yield chasing.
What Each Mechanism Actually Does
The yield mechanisms underlying competing stablecoins are not equivalent and should not be evaluated as if they were. The yield in each case is generated by a different underlying activity with different risk characteristics.
Ondo Finance’s USDY is the most straightforward yield mechanism. USDY holders own a claim on a basket of short-duration US Treasury bills and bank deposits, and the yield distributed to holders is the interest earned on those underlying assets minus the operating costs of running the product. The structure operates as a regulated security in jurisdictions where Ondo offers the product, with associated KYC requirements and investor accreditation rules in some cases. The yield is whatever short-duration Treasuries are paying minus the operating spread — a structurally simple and conservative product.
Sky Protocol’s USDS savings rate (formerly DAI’s DSR) distributes protocol surplus to USDS holders who deposit their tokens into the savings module. The yield comes from the protocol’s revenue, which is generated by stability fees charged on collateralised debt positions (Maker’s foundational mechanism), the interest earned on Maker’s own holdings of Treasury bills and other yielding assets in the protocol’s PSM (peg stability module), and the various other revenue streams the protocol has developed over its long operating history. The yield is variable and depends on protocol revenue conditions, but the mechanism is structurally similar to a dividend paid from operating cash flows of an established protocol.
Ethena’s USDe is the most aggressive and structurally complex of the major yield-bearing stablecoins. USDe maintains its dollar peg through a delta-neutral strategy: Ethena holds spot ETH or BTC and simultaneously holds an equivalent short position in ETH or BTC perpetual futures. The combination is dollar-neutral — gains in spot are offset by losses in futures (or vice versa) — and produces yield from two sources: the funding rate paid by perpetual futures traders to maintain their positions (typically positive when futures trade in contango), and the staking yield on the ETH collateral. In favourable conditions, this combination has produced double-digit annualised yields.
The Ethena Mechanism and Its Real Risks
The Ethena USDe mechanism deserves more detailed examination because it carries risks that the yield figures alone do not communicate, and because its rapid growth has made it systemically relevant to the broader DeFi ecosystem. The core risk is funding rate exposure: USDe’s yield depends on perpetual futures funding rates being positive, which they are in most market conditions but can become negative during sustained bear markets or specific market dislocations. In a sustained negative funding rate environment, USDe holders earn negative yield rather than positive, and the delta-neutral strategy that maintains the peg becomes a cost rather than a revenue source.
The historical funding rate data for ETH and BTC perpetual futures shows that funding rates are positive the majority of the time in bull market conditions and become negative during specific stress episodes. The 2022 bear market produced sustained periods of zero or negative funding, which would have produced negative yield for a USDe-equivalent product if one had existed at the time. Ethena’s yield represents a structural carry trade on perpetual futures market structure, with all the risks that any carry trade carries — including the risk of large losses when the carry reverses.
Ethena has built risk management mechanisms to handle adverse market conditions: an insurance fund that absorbs short-term funding rate losses, the option to invest in alternative yield-generating activities when funding rates are unfavourable, and the ability to redeem USDe back to the underlying collateral. These mechanisms reduce but do not eliminate the underlying funding rate risk. A USDe holder is structurally taking exposure to the perpetual futures market in a way that a USDC or USDT holder is not, and the additional yield compensates for that additional risk.
The systemic significance of Ethena’s growth deserves attention. USDe’s circulating supply has reached billions of dollars, and the associated ETH and BTC positions held as collateral represent meaningful market participation. If a sustained adverse funding environment forced Ethena to reduce its position significantly, the unwinding of the delta-neutral strategy could have spot price implications for ETH and BTC and could affect perpetual futures market dynamics in ways that other DeFi protocols would feel.
The Regulatory Framework Question
The regulatory treatment of yield-bearing stablecoins is more complex than the treatment of pure dollar-pegged stablecoins because the yield component potentially makes them securities rather than payment instruments. The GENIUS Act framework for stablecoins primarily addresses the payment stablecoin category — products designed to function as digital cash equivalents — and the treatment of yield-bearing products under that framework is less clear.
Ondo Finance’s USDY explicitly operates as a regulated security, accepting the registration and compliance overhead in exchange for clarity about its legal status. Ethena’s USDe has taken a more flexible approach, operating in some jurisdictions through subsidiaries with appropriate licensing and avoiding jurisdictions where the regulatory framework is unfavourable. Sky’s USDS has the longest operating history as a decentralised protocol and has generally not been treated as a centralised securities issuance by US regulators, though the regulatory treatment of decentralised protocol governance is itself evolving.
The practical implication for users and institutional allocators is that the regulatory status of any specific yield-bearing stablecoin needs to be evaluated explicitly rather than assumed to be equivalent to other products in the category. A bank treasury team evaluating yield-bearing stablecoin exposure faces different compliance considerations for a registered security (Ondo USDY) versus a decentralised protocol governance product (Sky USDS) versus a basis trade structure (Ethena USDe), even though all three are marketed as yield-bearing dollar-equivalent products.
What the Yield Wars Mean for USDC and USDT
The competitive pressure on USDC and USDT from yield-bearing alternatives is real but more limited than the headline product comparison would suggest. The use cases that USDC and USDT dominate — exchange trading pairs, DeFi protocol collateral, cross-border payments, settlement between counterparties — value the deep liquidity, regulatory clarity, and operational reliability of the established stablecoins more than they value the yield differential. A market maker holding USDC overnight for trading liquidity is not optimising for the yield it could earn on that USDC.
The competitive pressure is most significant in the segments where holders are explicitly seeking yield-bearing dollar exposure: corporate treasury allocations looking for cash management alternatives, DeFi yield-farming positions where capital allocators rotate between yield opportunities, and institutional crypto holdings where the opportunity cost of holding zero-yield stablecoins becomes material at scale. In these segments, the yield-bearing alternatives have captured meaningful share.
Circle’s response has been to expand USDC’s utility infrastructure — payments, treasury services, developer tools — rather than to introduce yield-sharing on the core USDC product, which would compress the float economics that fund Circle’s business. The Coinbase revenue-sharing arrangement on USDC means that any yield sharing with USDC holders would also affect Coinbase’s economics, creating structural resistance to that change. The result is that USDC and USDT continue to dominate the high-velocity payment and trading use cases while yield-bearing stablecoins capture the slower-velocity holding use cases.
What Each Product’s Risk Profile Actually Requires
For users and institutional allocators evaluating yield-bearing stablecoin exposure: the yield is real but the risk profile of each product is genuinely different from the underlying USDC or USDT comparison. Ondo USDY’s yield approximates Treasury bill returns minus the operating spread, with risk profile similar to holding short-duration Treasuries directly (plus smart contract and protocol risk). Sky USDS savings rate yield approximates the variable rate that Maker’s protocol revenue supports, with risk profile reflecting the protocol’s collateral management and governance. Ethena USDe’s yield is the most attractive in favourable conditions but carries funding rate risk that can produce losses in adverse conditions, plus the smart contract and centralisation risks of the Ethena protocol itself.
The category that does not exist — a yield-bearing stablecoin that combines USDC-level operational reliability with substantial yield — is the obvious gap that no current product fully fills. Each existing product trades some attribute of the ideal product (operational simplicity, yield level, regulatory clarity, decentralisation) for others. The competitive evolution of the segment over the next eighteen to twenty-four months will likely involve continued product differentiation rather than a single product capturing the entire market.
For DeFi participants who are using yield-bearing stablecoins as collateral in lending protocols or as components of more complex strategies: the additional yield comes with additional risk that compounds across protocol layers. A lending position collateralised by Ethena USDe is taking funding rate risk, smart contract risk on Ethena, smart contract risk on the lending protocol, and the operational risks of the connections between them. The yield can justify these stacked risks, but the evaluation should be explicit rather than implicit. The stablecoin yield wars are creating genuine product innovation; they are also creating genuine new risks that the marketing of yield figures does not always make visible.
What the Protocols’ Own Disclosures Actually Show About Yield Sustainability
The yield figures in stablecoin marketing material are not lies. They are true in the same way that a photograph of a building under construction is a true representation of the building — accurate at the moment it was taken, incomplete about what happens next. The discipline here is to go to the primary sources: the protocol documentation, the governance proposals, the on-chain treasury data, and the risk disclosures that protocols are required to make when they operate as regulated products.
Ondo Finance’s USDY documentation is the most straightforward to evaluate because the underlying assets are publicly disclosed and the yield calculation is transparent. The portfolio holds short-duration US Treasuries and bank deposits; the yield to holders is the blended return minus the Ondo operating fee and the custodian fee. When the Fed holds rates elevated, USDY holders earn a competitive return. When the Fed cuts, the yield compresses proportionally. No mechanism, no complexity, no hidden risk — which is precisely why it is the right baseline for evaluating the others.
Sky Protocol’s governance forum is the right place to evaluate USDS savings rate sustainability. The rate has been adjusted eleven times since it launched, and each adjustment was accompanied by a governance post explaining the rationale: protocol revenue from stability fees, the competitive rate environment, and the treasury’s ability to sustain distributions without depleting reserves. What the governance record shows is a protocol that has been honest about trade-offs and that has not promised yields it could not sustain. That institutional transparency is not a coincidence — it reflects a decade of operation and the reputational capital that comes with it.
Ethena’s basis trade documentation includes, if you read it carefully, the funding rate history during the 2022 bear market — a period when their product did not exist but when the underlying trade would have generated losses. The insurance fund that Ethena has built exists because the protocol’s own analysis showed those adverse periods were not anomalies. The on-chain credit market has learned to read protocol disclosures carefully: the question is not whether the mechanism is disclosed, but whether the disclosure includes the scenarios where the mechanism fails. Ethena’s does. That counts for something. It does not make the funding rate risk disappear, but it makes the risk calculable rather than hidden.
Second-Order Thinking in Stablecoin Yield: What the Mechanism Risk Doesn’t Show Up in the Headline Rate
Shane Parrish’s second-order thinking framework asks a question that most investors skip in the search for yield: what must be true about the mechanism for this return to be sustainable? The first-order question is “what is the return?” The second-order question is “under what conditions does this return persist, and under what conditions does it invert or disappear?” Stablecoin yield instruments in 2026 present a case where the distance between the first-order and second-order answers is exceptionally large.
Ethena’s USDe yield is generated by a delta-neutral position: spot ETH held long, short ETH perpetual futures position, with the net funding rate on the short position captured as yield. When leveraged long ETH demand in the perpetual market is high, funding rates are positive — short sellers receive funding from long holders. The headline rate reflects this mechanism’s output in favorable conditions. It does not reflect the second-order variable: what happens when the mechanism inverts. Perpetual funding rates went consistently negative during the Q4 2021–Q1 2022 drawdown, during the LUNA collapse in May 2022, and during the FTX contagion in November 2022. In each of these periods, the Ethena-equivalent yield mechanism would have produced negative returns on the yield component.
The expected value calculation that Parrish’s framework demands is: what is the probability-weighted yield across all market conditions, not just the favorable ones? Historical perpetual funding rate data suggests that funding rates are positive in roughly 60–70% of months but that negative periods cluster with the same macro stress events that affect every other risk asset. The Ethena yield is not independent of the rest of a risk portfolio. It correlates with drawdown events, which is precisely when investors relying on it for income are most exposed.
Sky’s USDS rate is a different second-order problem. The current yield reflects governance-determined incentive structures — specifically the Sky Savings Rate, which is set by DAO vote and can be adjusted in any direction at any time. The first-order investor question is “what is the current SSR?” The second-order question is “what governance dynamics could change it, and on what timeline?” Historical MakerDAO governance has been broadly rational about rate-setting, but governance rationality is a variable, not a constant. An investor modelling a multi-year yield expectation on the current SSR is assuming a governance stability the system does not structurally guarantee.
Ondo’s OUSG is mechanically simpler — it wraps access to short-term US Treasuries for on-chain users. The second-order variable here is the cost structure: management fees, redemption timing, counterparty exposure to Ondo’s custodial infrastructure, and the regulatory status of tokenised fund products. The on-chain T-bill yield appears equivalent to holding T-bills directly; the mechanism risk embedded in the wrapper is not zero.
The inversion exercise is the most useful tool from the Parrish toolkit. What scenario results in all three yields going to zero or negative simultaneously? A severe crypto market downturn drives Ethena funding negative; a Sky governance crisis cuts the SSR to near zero; regulatory action gates OUSG redemptions. These three events are not independent — they tend to cluster around macro credit stress. The evolving stablecoin regulatory framework will determine which yield mechanisms survive formal compliance review, which itself becomes a trigger condition for the third scenario. The Ethereum Foundation’s restructuring is relevant context for Ethena specifically: the health of the Ethereum ecosystem’s developer investment shapes long-term demand for leveraged ETH exposure, which is the underlying driver of the funding rate that generates Ethena’s yield.
Protocol-level fee market dynamics — visible on Solana in the SIMD implementation — illustrate the same principle at the infrastructure layer: the yield available to validators and liquidity providers is a function of a mechanism, and understanding that mechanism’s behaviour under stress is the prerequisite to evaluating whether the yield is real. Treasury market dynamics and the yield curve are the macro conditions most relevant to evaluating when a correlated stress cluster becomes probable. The second-order thinker does not ask which stablecoin has the highest yield today. They ask which one they would still hold at the bottom of the next market cycle.
