Summary
DeFi's lending markets entered the week with capital still rotating toward protocols that had tightened collateral controls ahead of the KelpDAO exploit, a trend reflected in continued deposit inflows to Spark and other venues perceived to have managed risk exposure well.
The week's most significant macro development was a CLARITY Act compromise on May 4th that preserved stablecoin reward programs as usage-based incentives, the first major legislative signal on onchain yield to clear the current Senate framework negotiations. Protocols continued formalizing structural responses to the April exploit: Aave published new asset listing standards covering cybersecurity and bridge architecture alongside existing financial risk criteria, while Spark adjusted its Liquidity Layer to stop new allocations to venues flagged for illiquidity. Hyperliquid activated HIP-4 on May 2nd, launching zero-fee outcome markets directly inside the same account structure used for perpetuals and spot trading.
Stablecoin Developments
Circle (USDC): The CLARITY Act compromise on May 4th is the week's biggest regulatory development for USDC. Lawmakers agreed to preserve stablecoin reward programs, allowing rewards structured as usage-driven incentives tied to transaction activity. USDC supply sits at $79 billion. Current yields: Aave Ethereum V3 is running at 3.3% APY on USDC supply, with Morpho vaults ranging 4% to 6.5% depending on the curator.
Tether (USDT): USDT supply sits near $190 billion. Active yield venues: Aave Ethereum USDT supply is in the 4% APY range depending on utilization; leading Morpho vaults are running 4% to 8% APY.
Sky Money (USDS): Spark's May 7 spell proposal adjusts two Liquidity Layer allocations: Aave Avalanche USDC is off boarded due to illiquidity conditions, and Aave Core USDT deposits are capped at zero following a recent risk event, with withdrawals remaining open. A separate proposal to deploy the Spark Liquidity Layer on Tempo with a 250 million spUSDC vault was included in the draft but delayed to a future spell. The Sky Savings Rate stands at 3.75% APY for sUSDS, with USDS supply at approximately $11.4 billion.
Maple Finance: Maple’s syrupUSDT currently yields 4.4% APY, while syrupUSDC is currently yielding 5.2% APY. This week, Maple introduced Proof of Reserves for syrupUSDC & syrupUSDT. Proof of Reserves is an independent, third-party verification of the collateral backing every loan on Maple, powered by The Network Firm.
Protocol Developments
Aave: Aave Labs published updated collateral and listing standards on May 7th, expanding its review process to cover cybersecurity vulnerabilities, interoperability, and the technical architecture of candidate assets alongside the existing financial risk and liquidity assessments. A formal playbook detailing minimum listing requirements will be published for asset issuers.
Hyperliquid: Hyperliquid activated HIP-4 on May 2nd, bringing fully collateralized outcome markets to mainnet. The product integrates directly into user accounts alongside perpetuals and spot positions and charges zero fees. Initial markets launched with BTC daily binary contracts. The design routes prediction market activity through the same capital and account structure users already maintain for perps trading, positioning it against Polymarket with the zero-fee model. Hyperliquid holds over 70% of decentralized perps volume by market share.
Spark: The May 7th spell adjusts three areas of the protocol. On the Liquidity Layer, Aave Avalanche USDC allocations are offboarded due to illiquidity conditions, and Aave Core USDT deposits are capped at zero following a recent risk event, with withdrawals remaining open on both. Spark's Morpho USDT vault on Ethereum transitions as well: the existing vault is set to zero new deposits and replaced by a new vault with a 100 million USDT deposit cap and a 1 billion USDT daily slope. On SparkLend, the WBTC supply cap automator increases from 3,000 to 30,000 and the LBTC cap is reduced from 10,000 to 5,000.
Lido: stETH is currently yielding approximately 2.6% APY with roughly $27 billion in total value locked. stETH remains the most widely integrated liquid staking token across DeFi lending markets.
Morpho: Morpho holds over $7.4 billion in deposits. Morpho Midnight, the fixed-rate, fixed-term lending protocol announced in April, remains in audit ahead of a public launch.
Pendle: Pendle continues to expand its RWA yield market coverage, with pools for USDG, apxUSD, and apyUSD active on Ethereum. The protocol holds approximately $1.4 billion in TVL with over $10 million in annualized fees.
Build With Yield.xyz
The most significant development this week is structural: Aave is rewriting the standards for what gets listed as collateral. Spark is tightening bridge security and offboarding assets from venues that didn't meet its risk threshold before the KelpDAO exploit. Hyperliquid is expanding its product surface to capture new categories of activity from its user base.
The protocols with the tightest collateral controls and the clearest risk parameters are the ones attracting capital and building from a position of stability.
Yield.xyz connects developers and allocators to more than 2,900 yield opportunities across 80+ networks, covering staking, lending, and DeFi vaults through a single onchain integration. When the market rotates toward protocols with better collateral hygiene, Yield.xyz surfaces where the yield actually is.