USDT and Stablecoin Pair FAQ — Peg Risk, Chains, and Pool Behaviour

Is USDT the same as a US dollar?

No. USDT is a token issued by a private company that states it holds reserves backing the tokens in circulation.

Holding it carries issuer risk and reserve risk that a bank deposit does not, and its market price can and does deviate from 1.00 during stress — which tends to be exactly when you most want to move into it.

A portfolio valued "in USDT" is valued in a claim on an issuer, not in cash.

Is the peg guaranteed?

No. A peg is a design goal maintained by an issuer or a mechanism, not a guarantee.

Redemption at par — the thing that anchors a fiat-backed peg — is typically available to specific counterparties under specific conditions, not to every holder on demand. Between those parties and the open market sits an arbitrage that usually works and occasionally does not.

Do all stablecoins carry the same risk?

No, and this matters more than which one has the bigger market cap. The designs fail in entirely different ways:

Fiat-backed (USDT, USDC) — fails if reserves are insufficient, illiquid, or inaccessible.
Crypto-collateralised — fails if collateral falls faster than liquidations can act.
Algorithmic — fails when confidence drops, and the mechanism can accelerate its own collapse. This has happened at scale, destroying token value entirely.

For fiat-backed coins the meaningful diligence is reserve composition and independent attestation — not the ticker.

What actually happens during a depeg?

It depends on where you are trading.

On an order book, the stablecoin's own pairs reprice and market makers widen or withdraw, so depth thins exactly when volume spikes.

In a constant-product pool, the formula just prices along the curve.

In a stableswap pool, behaviour changes sharply. Those curves are deliberately flat near parity — excellent depth while the peg holds. When it breaks, price moves fast as the curve leaves its flat region, and arbitrage drains the pool of the healthy asset. A pool that looked deep becomes one-sided quickly.

The general rule: efficiency in stablecoin pools is bought by assuming parity holds.

Does the blockchain matter?

Considerably. USDT exists on many chains as separate tokens with separate contract addresses.

Sending to a correct address on the wrong network can lose the funds permanently.
Each deployment has its own contract address; an address valid on one chain is meaningless on another.
Liquidity differs by chain, so the same nominal balance is not equally exitable everywhere.

Always confirm the network before depositing or withdrawing.

If my token is flat against USDT, am I flat?

Against crypto volatility, yes. In dollar terms, only if the peg is holding.

A token flat against USDT while USDT trades at 0.97 has fallen roughly 3% in dollar terms. This is rare and usually brief, but it is real, and it is invisible if you only ever look at the USDT-denominated chart.

Why is USDT the default quote asset almost everywhere?

Three reasons, all practical: a dollar-tracking unit makes prices comparable across pairs; it removes one source of volatility, so a price change tells you the base asset moved; and it lets traders sit in something stable without leaving the venue.

It also concentrates liquidity, because market makers quoting against a stable unit carry less risk and can therefore quote more size. See USDT trading pairs.

Should I hold more than one stablecoin?

If the amount justifies the effort, yes. Different issuers fail for different reasons, so diversifying issuer exposure is genuine diversification rather than cosmetic.

Weigh it against the friction: more assets, more chains, more addresses, more ways to send something to the wrong place.

Which does CoinDock quote in?

CoinDock quotes markets in USDT, for the comparability and volatility reasons above. It is a deliberate design decision rather than an inherited default.

That choice does carry the issuer and peg exposure described here, which is why it is stated plainly rather than glossed.

Stablecoin Pairs — Frequently Asked Questions