USDtb is issued by Ethena Labs — the team behind USDe (reviewed separately). USDtb was launched in 2024 as a complementary stablecoin to USDe, but with a fundamentally different backing mechanism. Unlike USDe (which uses delta-neutral crypto derivatives), USDtb is backed by BlackRock's BUIDL (USD Institutional Digital Liquidity Fund) — a tokenised US money market fund holding short-term US Treasuries. Anchorage Digital serves as USDtb's custodian. The backing by BUIDL gives USDtb the credit quality of a BlackRock-managed US Treasury money market fund rather than crypto derivatives exposure.
USDtb is designed as the 'safe asset' within the Ethena ecosystem — when funding rates on the derivatives underlying USDe go negative, Ethena shifts collateral into USDtb to preserve value. This makes USDtb a critical risk management tool for the entire Ethena protocol, not just a standalone product. USDtb does not accrue yield directly to holders — the yield stays within the BUIDL fund. This also means USDtb does not carry the sUSDe yield restriction under MiCA that affects USDe staking. MegaETH's USDM stablecoin (which uses USDtb as part of its collateral base) has grown to $300M+ supply.
USDtb is pegged to $1.00 with no capital appreciation. Circulating supply is approximately 600 million USDTB. It has near-zero daily trading volume on public exchanges — similar to JTRSY and BCAP — reflecting its institutional hold-and-use design rather than active trading. The market cap reflects actual BUIDL assets under management backing the stablecoin.
USDtb competes with USDC and USDT as a simple dollar stablecoin but differentiates through its BlackRock BUIDL backing. Within the Ethena ecosystem, it complements USDe as the lower-risk alternative when funding rates are unfavourable. It is more accessible in EU/Ireland than sUSDe (which has MiCA yield restrictions).
USDtb's fate is closely tied to Ethena Labs — if Ethena faces regulatory or operational challenges, USDtb access could be affected. BUIDL as backing asset means exposure to BlackRock's fund operations (considered very low risk but non-zero). Near-zero trading volume on public exchanges limits practical liquidity for secondary market sales.
Ethena ecosystem grows significantly and USDtb becomes a standard USD-denominated collateral asset in major DeFi protocols, or MegaETH's USDM drives sustained USDtb demand as an institutional backing asset.
Ethena faces operational or regulatory challenges that affect USDtb access, or more liquid alternatives (USDC, USDT) maintain dominance in EU-accessible DeFi collateral.
We would become more positive if: USDtb achieves significant DeFi protocol adoption as collateral, and liquidity on secondary markets improves. We would become more cautious if: Ethena faces material regulatory challenges, or BUIDL experiences issues (considered very unlikely given BlackRock management).
USDtb is the most interesting product in this list for Irish and EU investors specifically. It is backed by BlackRock BUIDL (US Treasuries via a world-class asset manager), issued by the credible Ethena Labs team, does not carry the MiCA yield restriction of sUSDe, and provides a genuinely low-risk USD-pegged stablecoin option within the Ethena ecosystem. It is not yield-bearing but its BUIDL backing provides institutional-grade collateral quality. A solid stablecoin choice for EU DeFi users in the Ethena ecosystem.
Irish/EU investor note: Unlike USDe's staking product (sUSDe), which is MiCA-restricted for EU users, USDtb is a straightforward dollar stablecoin backed by BlackRock BUIDL that does not carry yield restrictions. Irish investors can hold USDtb within the Ethena ecosystem without the regulatory complications that apply to sUSDe yield features.