Spark Savings ETH (spETH) is a yield-bearing savings vault for ETH. Users deposit ETH and receive spETH tokens that automatically accrue yield over time. It is built on the ERC-4626 tokenized vault standard, meaning spETH is transferable and composable with other DeFi protocols it continues earning yield wherever it's held. spETH is part of Spark's Savings product suite, which deploys liquidity across DeFi via the Spark Liquidity Layer to generate risk-adjusted returns for depositors. Spark is the Prime Agent of Sky (the protocol behind USDS/DAI), giving it direct access to Sky liquidity to deploy at scale.