OKX Lets Institutions Use BlackRock’s BUIDL as Trading Collateral

Corporate trader reviewing monitor displaying BUIDL collateral with OKX and BlackRock branding, Standard Chartered custody.

OKX has begun allowing eligible institutional and VIP clients to use BlackRock’s tokenized money market fund, BUIDL, as collateral for margin and derivatives trading. The arrangement places the assets in regulated off-exchange custody with Standard Chartered, creating a yield-bearing collateral corridor for institutional crypto traders.

BlackRock integrates Chronicle verification layer into tokenized BUIDL fund

Analyst at a desk with a monitor showing live on-chain attestations for a tokenized BUIDL fund and Chronicle verification.

BlackRock has added Chronicle Labs’ Proof of Asset verification layer to its tokenized BUIDL fund, a move that shifts the product from periodic attestations toward continuous, cryptographically verifiable asset reporting. The integration is designed to provide near-real-time visibility into the fund’s underlying holdings and to create a public, tamper-evident audit trail for institutional users.