The U.S. Securities and Exchange Commission (SEC) Division of Trading and Markets has clarified that broker-dealers must maintain absolute control over private keys to comply with customer protection rules for "crypto asset securities."
In its interim guidance, the SEC explicitly included tokenized stocks and bonds, signaling that regulators will impose stricter scrutiny on blockchain-based versions of traditional securities.
Broker-dealers are required to establish written policies to prevent theft, loss, or unauthorized use of private keys. Firms facing significant security or operational risks cannot claim custody rights.
The SEC also mandated that relevant institutions prepare contingency plans for blockchain disruptions, governance changes, and legal actions such as asset freezes or seizures.
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