What First Digital USD is
First Digital USD is a US dollar-pegged stablecoin issued by First Digital Labs, a Hong Kong-based fintech, with reserves held by First Digital Trust, a Hong Kong trust company. Launched in June 2023, FDUSD is designed to be redeemable 1:1 for US dollars, backed by cash and cash-equivalent reserves such as short-term US Treasury holdings, with attestations published periodically by an independent accounting firm.
FDUSD's growth was less about organic demand and more about a very deliberate distribution push: Binance, the world's largest crypto exchange, offered zero-fee trading on FDUSD pairs shortly after launch, and the exchange effectively adopted it as a preferred stablecoin alongside its existing FDUSD and BUSD offerings following the wind-down of Binance's own BUSD stablecoin under regulatory pressure. That backing turned FDUSD into one of the highest-volume stablecoins on the market within roughly a year of launch, almost entirely on the back of Binance trading activity.
What FDUSD is used for
FDUSD functions as a standard trading and settlement stablecoin — a dollar-stable unit for moving value on-chain and pricing trades without cycling back through fiat rails each time. Its usage is heavily concentrated on Binance and Binance-linked platforms, with far less organic presence in DeFi or on other exchanges compared to market leaders like USDT and USDC.
Risks
FDUSD's most significant real-world test came in April 2024, when Tron founder Justin Sun publicly alleged that First Digital Trust was insolvent, in a dispute connected to a separate custody disagreement over Tron-linked TUSD reserves. The allegation, denied by First Digital, triggered a sharp confidence shock: FDUSD briefly depegged to around $0.87 before recovering to its $1 peg within about a day as First Digital pushed back and provided reassurances. The episode illustrated a real fragility — a stablecoin's peg can wobble hard on reputational attacks alone, regardless of whether the underlying reserves are actually sound.
The concentration risk is arguably the bigger long-run issue: FDUSD's volume is overwhelmingly tied to a single exchange's promotional decisions, which means its usage (and by extension its perceived reliability) could shrink quickly if Binance's incentives change. As with all fiat-backed stablecoins, reserve transparency depends on the quality and frequency of independent attestations rather than full real-time audits, and Hong Kong's regulatory framework for stablecoin issuers is still maturing relative to more established regimes.