Spark Savings bumps USDT vault APY to 3.5% as stablecoin yield competition heats up

Spark Savings has increased the annual percentage yield on its USDT vault to 3.5%, up from 3.25%. The adjustment, visible on the Spark Finance app, marks a roughly 8% improvement in the rate offered to stablecoin depositors using the protocol. For a vault holding somewhere in the range of $340 million to $361 million in total value locked, even a quarter-point bump in yield translates to millions of additional dollars flowing to depositors annually. How the Spark Savings vault works Spark Savings is a product within the broader Spark protocol, which itself sits inside the Sky ecosystem, the rebranded entity formerly known as MakerDAO. Users deposit USDT and receive spUSDT vault tokens in return, which accrue yield over time. The vault is built on the ERC-4626 standard, a tokenized vault specification on Ethereum that enables efficient capital allocation and instant withdrawals. The Spark Liquidity Layer deploys deposited funds across multiple lending markets, including SparkLend, which carries benchmark yields of around 2.75%. The protocol maintains idle liquidity buffers that often exceed 60% to 100% of deposits. Governance-driven rates, not fixed schedules Spark’s yield adjustmen...