Odaily News According to Arkham data, Ethena Labs recently increased its holdings of BlackRock BUIDL-I tokens by $225 million, bringing its total holdings of BUIDL tokens to more than $1 billion. The BUIDL fund is issued by BlackRock in cooperation with Securitize, and mainly invests in U.S. Treasury bonds, cash and repurchase agreements, aiming to provide investors with stable returns.