Table of Contents
The integration runs through the same collateral-mirroring pilot OKX and Standard Chartered launched on 10 April 2025 under the Dubai Virtual Asset Regulatory Authority (VARA) framework. BENJI was the inaugural admitted asset; BUIDL is now the second tokenized money-market fund onboarded under the programme, which the partners had described from the start as "the first in a series." Brevan Howard Digital was among the early institutions to participate.
OKX VIP and institutional clients on OKX Middle East can post BUIDL in two configurations. Under the off-exchange route, BUIDL stays in regulated custody at Standard Chartered's Dubai International Financial Centre entity, and OKX mirrors the position as usable margin on its platform without moving the underlying tokens. Under the on-exchange route, traders deposit BUIDL directly on OKX and use it as yield-bearing margin for spot and derivatives trading. In either path, the underlying Treasury yield continues to accrue, paid out by BlackRock as new tokens distributed to holders' wallets each month. Within OKX's risk system, BUIDL is treated as fungible with USD, USDC and other dollar-denominated stablecoins. The fund itself, tokenized by Securitize, holds cash, U.S. Treasury bills and repurchase agreements, and is designed to maintain a stable $1 net asset value.
Standard Chartered is one of 29 banks on the Financial Stability Board's 2025 list of globally systemically important banks. G-SIB designation, established by the Basel Committee in 2010 as part of Basel III, requires higher loss-absorbency capital and enhanced supervision. Banks in that category have historically taken cautious approaches to digital-asset custody. That caution is exactly what the OKX-Standard Chartered framework is engineered to overcome. By segregating client collateral inside a G-SIB custodian, the structure addresses one of the persistent objections from institutional risk officers — exchange counterparty risk — while still giving traders access to the deepest crypto liquidity venues. For the tokenization industry, the precedent matters more than the BUIDL-specific mechanics: it shows that regulated banks can hold tokenized fund positions for clients trading on a public-blockchain venue without rewriting the custody perimeter.
OKX is the third major centralized exchange to accept BUIDL as collateral in roughly six months, after Crypto.com and Deribit in June 2025 and Binance in November 2025. In DeFi, BUIDL has been integrated into Aave V4 and Sky (the protocol formerly known as MakerDAO) by late 2025. According to data cited in OKX's 2026 outlook, roughly $2.2 billion of tokenized Treasuries — about 30% of the on-chain supply — is now actively used as collateral across centralized and decentralized venues, rather than sitting passively in wallets. The OKX programme itself has expanded since the Dubai pilot. In October 2025, after OKX secured its MiCA licence, Standard Chartered extended the framework to the European Economic Area, where it had accumulated more than $100 million in assets under custody at the time of expansion.
A related corporate development sits one layer up the stack: Securitize, which issues BUIDL on-chain, has announced a proposed business combination with Cantor Equity Partners II (Nasdaq: CEPT). If completed, the deal would put the largest tokenization platform in the U.S. into public markets, giving institutional allocators a direct equity vehicle for the infrastructure layer of tokenized funds.
For fund managers, family offices and prop trading desks, the framework collapses a long-standing inefficiency. Cash and stablecoins posted on exchanges historically earned nothing, while the same capital in a money-market fund yielded 4–5% in the current rate environment. BUIDL turns idle margin into a productive Treasury position without forcing a choice between yield and tradeability. For compliance teams evaluating tokenized-asset adoption, the OKX-Standard Chartered structure offers a documented precedent for G-SIB custody integration with public-blockchain collateral, which is harder to dismiss internally than DeFi-native arrangements.
The companies have not disclosed the haircut applied to BUIDL when used as margin, the maximum collateral threshold per client, or the liquidation mechanics during periods of market stress. Neither party has detailed how margin calls would be handled if secondary-market liquidity for BUIDL thins — a relevant concern given the token trades far less actively than the cash and stablecoins it sits alongside in the collateral stack. The launch is also limited for now to OKX Middle East and the previously expanded EEA programme; OKX has not stated when, or whether, similar arrangements will extend to its other regional entities.
