What is First Digital USD (FDUSD)?

First Digital USD is a dollar stablecoin issued by FD121 Limited under the First Digital Labs brand, with reserves custodied by First Digital Trust Limited, a trust company registered in Hong Kong under the Trustee Ordinance. Each token is a claim on a dollar held in cash and short-term US Treasury bills.

The Hong Kong domicile is the point of the product. FDUSD was built for a market that wanted a dollar token not issued from the United States and not carrying Tether's disclosure history — regulated somewhere, but not in New York. Whether a Trustee Ordinance registration is comparable to a NYDFS trust charter is a fair question, and the honest answer is that it is a lighter regime with less frequent examination.

Why it grew, and why it is shrinking

FDUSD's history is really the history of one commercial decision. Binance listed it in July 2023 with zero-fee trading against dozens of assets, and traders moved to whatever pair cost nothing. At the peak roughly 94% of all FDUSD sat on Binance. That is not adoption; that is a fee subsidy with a token attached.

The mechanism ran in reverse when Binance began delisting FDUSD pairs in 2026. Market cap fell around 86% from its $2.6bn peak to about $349m by mid-year. Nothing broke — the peg held and redemptions were met. The demand simply had nowhere to live once the venue that created it stopped.

One use dominates everything else, and it is narrow.

• Quote asset and trading pair on Binance, historically the reason nearly all of it existed.
• Settlement between exchanges and market-makers in Asia, where a non-US issuer is preferred.
• Limited DeFi presence — FDUSD never built the lending-market integrations that USDC and DAI have, which is part of why the supply had nowhere to go when Binance stepped back.

If you are choosing a dollar token to hold rather than to trade with on one specific venue, the case for FDUSD is hard to make. Its liquidity is concentrated, its integrations are thin, and its float is a fraction of what it was.

Minted on deposit, burned on redemption, no cap and no schedule — supply is pure demand signal, and this one has been signalling the same thing for two years.

From roughly $2.6bn at peak to about $350m by mid-2026 is an 86% contraction. Read it correctly: this was not a loss of confidence in the reserve, and holders were redeemed at par. It is what happens when a token's entire demand was a trading incentive on one exchange and the exchange withdrew it.

The analytically useful version of this story is that concentration cuts both ways and the direction is set by someone else. FDUSD's growth curve and its decline curve have the same author, and it was never First Digital.

April 2025: the insolvency allegation and the run

On 2 April 2025, Tron founder Justin Sun posted that First Digital Trust was "effectively insolvent and unable to fulfil client fund redemptions". FDUSD fell to as low as $0.87 within hours — a 13% break in a token whose entire purpose is not to move. First Digital rejected the claim the same day, called it a defamatory campaign, said FDUSD remained fully backed by US Treasury bills, and the token recovered toward par within about a day.

No redemption failed and the allegation was not substantiated. What the episode measured was fragility of confidence rather than fragility of reserves: a single post from a well-known figure moved a supposedly stable asset 13% in hours, which tells you how thin the base of independent verification was. That is the risk a lighter disclosure regime carries, and it is not fixed by the reserve being fine.

Single-venue dependency

A token that had 94% of its supply on one exchange has that exchange as its real counterparty, whatever the reserve documents say. Binance's decision to list it built the float and its decision to delist pairs removed most of it. Neither decision was First Digital's.

Disclosure and jurisdiction

Attestations exist, but the Hong Kong Trustee Ordinance framework is less demanding than a New York trust charter in examination frequency and reserve composition rules. For a holder, that means more of the assurance rests on the issuer's own reporting — which is precisely what the April 2025 episode stress-tested.

Shrinking liquidity

At about $350m and falling, the practical risk is no longer the peg but the exit. Order books are thin, and a redemption at size now routes through the issuer rather than the market.