USDT vs FDUSD
Tether and First Digital USD, compared on the things that decide whether you get your dollar back. Live data, updated continuously.
30-day peg gap and USDT/FDUSD spread
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The largest dollar token on-chain, backed mainly by US Treasury bills and cash equivalents. Direct redemption is available to verified institutional customers above a minimum size; everyone else exits via secondary markets.
Verdict band: Adequate
Hong Kong-issued dollar token with reserves held in regulated custodians. Liquidity is heavily concentrated on a small number of venues.
Verdict band: Adequate
| Safety scoreComposite of collateral, peg, liquidity, issuer and track record. | ●●●●●5 of 5 | 76 | 61 | USDT |
|---|---|---|---|---|
| Collateral qualityWhat actually backs the token, and how liquid that backing is. | ●●●●●5 of 5 | 78 | 85 | FDUSD |
| Exit liquidityWhether you can leave at size without moving the price. | ●●●●●5 of 5 | $2.47B | $2.51M | USDT |
| Issuer & legal standingRegulatory perimeter, disclosure quality and redemption rights. | ●●●●4 of 5 | 54 | 54 | Tie |
| Peg tightness (live)Absolute distance from $1.00 right now — smaller is better. | ●●●●4 of 5 | −0.036% | −0.114% | USDT |
| Worst recorded depegHow badly the token has broken before, as a stress precedent. | ●●●●4 of 5 | -4.8% | -8.7% | USDT |
| Track recordYears live and behaviour through past stress events. | ●●●●4 of 5 | 100 | 59 | USDT |
| Scale / market capBigger float usually means broader venue support and tighter spreads. | ●●●3 of 5 | $183.01B | $351.52M | USDT |
| Chain reachNumber of networks where the token is natively deployed. | ●●●3 of 5 | 102 chains | 6 chains | USDT |
| Best available yieldUpside — but every extra point above T-bills is paid for with risk. | ●●2 of 5 | 9.25% | 3.21% | USDT |
"Matters" is our weighting of how much each dimension typically drives a real allocation decision. Sort any column to re-rank the tradeoffs by what matters to you.
The short answer
USDT scores higher on safety (76 vs 61), driven mainly by peg stability and track record. USDT has deeper tracked liquidity ($2.47B), which is what determines whether you can exit at size. USDT currently earns up to 9.25% — remember that any rate above the T-bill yield is payment for a risk.
If both are fiat-reserve tokens, note that holding both is not diversification: they share the same short-dated Treasury and banking exposure. Genuine diversification means mixing collateral structures.
Which one fits your goal: USDT or FDUSD?
Capital preservation over everything else.
For park cash safely, USDT is the better fit over FDUSD.
- Safety score 76 vs 61, with collateral rated 78/100.
- Current peg deviation -0.036% against -0.114% for FDUSD.
- USDT has 2 recorded depeg event(s) — read them before sizing up.
Concentrating in one issuer is a single point of failure regardless of score. Split across collateral structures.
Key risks, side by side
USDT
- Issuer and banking risk: reserves sit with Tether under El Salvador / BVI rules.
- Depeg history: 2 recorded event(s), worst deviation -4.80%.
- Attestation cadence: quarterly.
- Yield venue risk: 9.25% is earned outside the token itself.
FDUSD
- Issuer and banking risk: reserves sit with First Digital under Hong Kong rules.
- Depeg history: 1 recorded event(s), worst deviation -8.70%.
- Attestation cadence: monthly.
- Yield venue risk: 3.21% is earned outside the token itself.
| Metric | USDT | FDUSD |
|---|---|---|
| Category | Stablecoin | Stablecoin |
| Issuer | Tether | First Digital |
| Jurisdiction | El Salvador / BVI | Hong Kong |
| Collateral | fiat-reserves | fiat-reserves |
| Peg mechanism | fiat-backed | fiat-backed |
| Attestation | quarterly | monthly |
| Redemption | gated | gated |
| Price | $0.9996 | $0.9989 |
| Peg deviation | −0.036% | −0.114% |
| Market cap | $183.01B | $351.52M |
| 7d supply change | −0.04% | +0.05% |
| Liquidity | $2.47B | $2.51M |
| Best yield | 9.25% (lista-lending · BSC) | 3.21% (venus-core-pool · BSC) |
| Chains | 102 | 6 |
| Launched | 2014 | 2023 |
| Worst recorded depeg | −4.8% | −8.7% |
Spread, peg gap and switching cost
- Price spread (USDT vs FDUSD)
- +7.8 bps
- $0.9996 vs $0.9989
- Peg deviation gap
- -0.078 pp
- USDT −0.036% · FDUSD −0.114%
- Yield spread
- +6.04%
- USDT 9.25% · FDUSD 3.21%
- Liquidity ratio
- 983.93×
- $2.47B vs $2.51M
A round trip between USDT and FDUSD costs roughly the market spread plus venue fees. At 7.8 bps of price gap, swapping $1M implies about $781.65 of price impact before fees — usually only worth it if the peg gap or yield spread is durable, not intraday noise.
Historical context
Track record is the part of a stablecoin you cannot model — it has to be observed. Here is how USDT and FDUSD have actually behaved since launch, including every stress event we have on record.
- USDT
Tether goes live.
- USDT
Launched as Realcoin on Bitcoin's Omni layer, later renamed Tether.
- USDT
NYAG filings reveal reserves were not fully cash-backed at the time.
- USDT
Settles with the NY Attorney General; agrees to quarterly reserve reporting.
- USDT
Terra contagion run (worst deviation -4.8%).
- USDT
Shifts reserves decisively toward short-dated US Treasury bills.
- FDUSD
First Digital USD goes live.
- USDT
Banking stress (worst deviation 0.5%).
- FDUSD
Solvency allegations (worst deviation -8.7%).
Chain coverage
USDT is live on 102 chains, FDUSD on 6. 6 chains carry both, so bridging is only unavoidable for the 96 networks where just one of them is deployed.
| Chain | USDT | FDUSD | Both available |
|---|---|---|---|
| $90.40B | — | USDT only | |
| $74.29B | $242.26M | Yes | |
| $9.18B | $57.17M | Yes | |
| $2.86B | $8.52M | Yes | |
| $976.65M | — | USDT only | |
| $829.30M | $44.7K | Yes | |
| $810.39M | — | USDT only | |
| $721.68M | — | USDT only | |
| $685.54M | $1.1K | Yes | |
| $430.73M | — | USDT only | |
| $367.46M | — | USDT only | |
| $228.40M | — | USDT only | |
| $198.37M | — | USDT only | |
| $112.69M | — | USDT only | |
| $97.73M | — | USDT only | |
| $82.93M | — | USDT only | |
| $80.01M | — | USDT only | |
| $78.90M | — | USDT only | |
| $64.34M | — | USDT only | |
| $61.11M | — | USDT only |
USDT vs FDUSD: frequently asked questions
Is USDT or FDUSD safer?
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On our composite safety score USDT rates 76/100 versus 61/100 for FDUSD. The score weighs collateral quality (fiat-reserves vs fiat-reserves), redemption rights, attestation quality, peg history and liquidity depth. A higher score is not a guarantee: both remain issuer-credit and smart-contract exposures, not insured bank deposits.
What is the difference between USDT and FDUSD?
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Tether is issued by Tether (El Salvador / BVI), backed by fiat-reserves, with redemption terms: gated. First Digital USD is issued by First Digital (Hong Kong), backed by fiat-reserves, with redemption terms: gated. Attestation coverage is "quarterly" for USDT and "monthly" for FDUSD.
Which has the bigger market cap, USDT or FDUSD?
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USDT is larger at $183.01B in circulating supply, against $351.52M for the other. Over the last 7 days supply moved −0.04% for USDT and +0.05% for FDUSD.
Are USDT and FDUSD trading at $1.00 right now?
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USDT trades at $0.9996 (−0.036% off peg) and FDUSD at $0.9989 (−0.114% off peg). The gap between the two is about 7.8 basis points, which is the cost you pay when rotating size between them before fees.
Has USDT or FDUSD ever depegged?
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USDT: worst recorded deviation −4.8%. FDUSD: worst recorded deviation −8.7%. Past peg behaviour under stress is the single best available proxy for how a token trades in the next crisis.
Which is better for large institutional size, USDT or FDUSD?
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For block size the constraint is exit liquidity and primary redemption, not headline supply. USDT shows deeper on-chain liquidity at $2.47B versus $2.51M. Combine that with the redemption channel — USDT: gated; FDUSD: gated — and size trades against the primary window rather than the order book where possible.
Can I earn yield on USDT or FDUSD?
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USDT currently shows the higher rate at 9.25% via lista-lending · BSC, against 3.21% via venus-core-pool · BSC for FDUSD. Neither token pays interest by holding it in a wallet: the yield comes from lending, liquidity provision or a wrapped yield-bearing version, each with its own counterparty and contract risk.
Which chains support both USDT and FDUSD?
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Both are deployed on 6 shared networks, including Ethereum, BSC, Solana, Arbitrum, TON, Sui. USDT spans 102 chains in total and FDUSD spans 6. Bridged supply on a chain is not the same as natively issued supply, and it usually carries the bridge's risk rather than the issuer's.
What does it cost to switch from USDT to FDUSD?
+
Budget three components: the current price spread of roughly 7.8 bps, swap or venue fees, and slippage against available depth ($2.47B for USDT, $2.51M for FDUSD). For meaningful size, redeeming with the issuer and minting the other side is often cheaper than a secondary-market swap.
Is USDT or FDUSD regulated?
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USDT is issued from El Salvador / BVI with quarterly; FDUSD is issued from Hong Kong with monthly. Regulatory status varies by your own jurisdiction and by whether the token is offered under a specific stablecoin regime, so treat this as a starting point for diligence, not legal advice.