BlackRock’s USD Institutional Digital Liquidity Fund (BUIDL) has narrowly overtaken Circle’s USYC to become the second-largest tokenized U.S. Treasury fund, highlighting the accelerating competition in the tokenized real-world asset (RWA) market.
BUIDL and USYC compete for market share
According to Token Terminal data, the total tokenized U.S. Treasury market is worth approximately $15.1 billion. BUIDL accounts for about $2.8 billion, giving it an estimated 18.5% market share. Nearly one-fifth of all tokenized Treasury assets are therefore held through BlackRock’s fund.
USYC also recorded rapid growth in 2025, rising from roughly $600 million to nearly $3 billion. By late August 2026, the fund had reached approximately $2.9 billion, slightly above BUIDL’s estimated $2.7 billion at that point.
In a separate market snapshot, Sky’s uSDS ranked first with a value of $4.4 billion, followed by BUIDL at $2.28 billion. Tether’s XAUT ranked third at $2.8 billion, while Circle’s USYC was listed fourth at $2.28 billion.
However, XAUT is classified as a tokenized commodity rather than a tokenized fund. Excluding uSDS and XAUT, BUIDL and USYC remain closely matched, meaning new institutional inflows or withdrawals could quickly change their rankings.
BlackRock’s position may also shift rapidly because the asset manager frequently records significant inflows and outflows across its Bitcoin [BTC] and Ethereum [$ETH] exchange-traded funds (ETFs), affecting their cumulative flow totals.
BlackRock expands its tokenized fund offering
The competition comes as BlackRock recently launched BSTBL on Ethereum and BRSRV on Solana [$SOL]. The tokenized money market funds are designed to serve as reserve assets for stablecoins.
The development is significant because stablecoins now represent approximately $305 billion and have become a major source of on-chain liquidity. By offering similar institutional products on both Ethereum and Solana, BlackRock is providing capital access to both ecosystems while reinforcing the competition between $ETH and $SOL for liquidity.
By late August, USYC had reached approximately $2.9 billion, slightly above BUIDL’s estimated $2.7 billion. BUIDL has since narrowly overtaken USYC, underscoring the growing competition among tokenized Treasury funds and the broader expansion of institutional RWAs.
