SEC Commissioner Hester Peirce warned that crypto vaults and on-chain lending strategies may fall under federal securities laws depending on their structure and operations, signaling regulatory scrutiny for a rapidly growing DeFi segment. She emphasized that simply moving activities on-chain does not remove them from the Howey test, with vaults potentially resembling securities, investment companies, advisers, or common enterprises based on design and governance. The guidance applies to both fully automated and actively managed setups, and could also render on-chain lending terms such as interest rates and collateral as notes or securities depending on who makes those decisions. Peirce noted that the SEC will assess each product on its own facts and encouraged developers to engage with regulators rather than assume blockchain alone excludes jurisdiction. Market participants have been reacting quickly to the possibility of heightened scrutiny, fueling ongoing debate over the line between decentralization and meaningful human control. Overall, the dialogue underscores that custodying automated yield via vaults and lending on-chain will be regulated with a focus on structure and risk, not technology alone.