Crypto exchange OKX is adding support for BlackRock BUIDL$1.00 into its margin system, letting clients use a tokenized Treasury fund.
Cryptocurrency exchange OKX launched a new collateral framework with financial behemoth BlackRock and international lender Standard Chartered, allowing select clients to use tokenized short-term U.S. Treasury fund BUIDL as collateral for trading on its platform.
In a Tuesday press release, Standard Chartered said the assets can be held off-exchange in its custody, while clients continue trading on OKX Middle East.
The idea, according to the press release, is that collateral doesn’t have to sit there doing nothing. Instead of posting only cash or crypto as margin, eligible OKX clients can post BUIDL, a tokenized money-market-style fund backed by cash, U.S. Treasury bills and repurchase agreements.
The fund distributes yield on-chain, meaning the collateral can still earn income while being used inside trading workflows.
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Tokenized Assets Move Into Crypto Trading
Tokenized Treasuries have grown into one of the cleaner real-world asset use cases as they are tied to short-term U.S. government debt.
Data from RWA.xyz shows tokenized U.S. Treasuries with $15.07 billion in distributed value as of April 29, up nearly 15% over the past 30 days. The market now spans 76 assets and 61,140 holders, with a listed 7-day APY of about 3.05%.
But OKX isn’t the first one in the industry to embrace BUIDL as collateral. Its key rival, crypto exchange Binance, said in a November 2025 announcement that it would also accept BlackRock’s BUIDL as off-exchange collateral for institutional users through its Binance Banking Triparty and MirrorRSV services.
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