Blackrock, Standard Chartered Power OKX Tokenized Treasury Collateral System

Key Takeaways:

• OKX framework, introduced April 28, 2026 enables tokenized U.S. Treasury assets as trading margin and collateral.
• Blackrock BUIDL fund delivers tokenized Treasury exposure with yield benchmarked to the U.S. Federal Funds rate.
• Standard Chartered custody keeps assets off-exchange while supporting real-time trading access and uninterrupted yield generation.

Tokenized Treasury Collateral Expands Across OKX Trading

Blackrock and Standard Chartered are central to a framework introduced on April 28, 2026, by OKX to expand how tokenized real-world assets ( RWAs) operate in trading systems. The model allows tokenized U.S. Treasury exposure to function as both margin and collateral, enabling institutions to keep capital deployed while maintaining yield from traditional financial instruments.

The system is built around Blackrock’s BUIDL fund, issued on blockchain infrastructure and integrated into OKX’s trading environment. The crypto firm stated:

Standard Chartered provides regulated custody, allowing assets to remain off-exchange while still supporting trading activity. This removes the need to separate idle capital from active positions and connects traditional financial exposure directly with digital trading systems.

Custody Model Keeps Yield Active While Trading Continues

BUIDL is structured to maintain stable value while generating returns from traditional financial instruments. The fund allocates its holdings to cash, U.S. Treasury bills, and repurchase agreements, ensuring that yield continues to accrue while assets remain on blockchain rails. It distributes earnings directly to holders and supports transfers between approved participants, allowing continuous access and flexibility in ownership. This design enables the asset to function within collateral workflows without disrupting yield generation.

The framework connects on-exchange and off-exchange environments into a single operational model. On OKX, BUIDL can be used as margin across trading activities, where yield continues to accumulate. Off-exchange, the same holdings remain secured within Standard Chartered’s custody while still supporting trading exposure. This dual structure maintains continuity between custody and execution, avoiding asset transfers that interrupt positioning or returns.

The result is a shift in how institutions manage capital in digital markets. Exposure to short-term U.S. Treasury instruments remains intact while being actively deployed in trading strategies. Yield persists, custody protections meet global banking standards, and trading continues in real time through OKX infrastructure. OKX detailed:

With assets anchored to cash and government-backed instruments, the framework reflects a broader move toward embedding tokenization into financial systems.