Tether · Explainer

What is Tether (USDT)? The largest stablecoin explained

Tether (USDT) is a US-dollar-pegged stablecoin issued by Tether Limited. Here's what it is, how it works, and where the risk lives.

By Eric Nkando, senior writer · 2 min read · Updated 14 Sep 2026

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The facts

Ticker: USDT
Peg: 1 USDT ≈ 1 USD
Issuer: Tether Limited
Available on: Ethereum, Tron, Solana, and every major chain
Reserves: Cash, US Treasury bills, other assets (quarterly attestations)

Answer first

Tether (USDT) is a US-dollar-pegged stablecoin issued by Tether Limited. Each USDT in circulation is intended to be backed by an equivalent amount of reserves. USDT is the largest and most-traded stablecoin, available across Ethereum, Tron, Solana, and every other major blockchain. It serves as the de facto trading pair currency in crypto markets.

How Tether works

Tether Limited holds reserves (cash, short-duration US Treasury bills, and other assets). For every USDT it issues, Tether claims to hold at least $1 of reserves. Users acquire USDT by depositing dollars with Tether directly (typically only large institutions do this) or by buying USDT on the secondary market — exchanges, DEXs, OTC desks.

The peg is maintained through arbitrage: if USDT trades below $1, arbitrageurs buy discounted USDT and redeem for $1 with Tether Limited, pushing the price up. If USDT trades above $1, they sell into the market. This works reliably when Tether's redemption process is functioning.

Where the risk lives

Reserve composition. Tether publishes attestations, not full audits. The reserve mix has shifted over time — earlier iterations held significant commercial paper; current reports emphasize Treasuries. Users must trust attestations.
Peg breaks. USDT has traded below $1 several times under stress (2018 SVB scare, 2022 Terra collapse, 2023 SVB). Each time it recovered, but the risk is real.
Freezing. Tether Limited can and does freeze USDT balances at specific addresses. This is a compliance feature; it also means USDT is not truly permissionless.
Regulatory. Global stablecoin regulation is evolving. Tether operates from an offshore jurisdiction (Hong Kong / El Salvador). Regulatory friction in specific markets is ongoing.

When to use USDT

Trading on exchanges. Most crypto trading pairs quote against USDT. If you're trading on a non-US exchange, holding USDT as your "cash" position is standard.
Cross-border transfers. USDT-on-Tron is one of the cheapest ways to move dollars globally.
DeFi. USDT is deep-liquidity in most DeFi protocols on Ethereum + L2s.

When to prefer USDC or another stablecoin

US regulatory posture matters — USDC's regulated-issuer model is cleaner
You need real financial audits — neither has full audits but USDC's attestations are stronger
You want a fully decentralized stablecoin — consider DAI (Sky's USDS) instead

USDC hub — the regulated alternative
Tether hub
Ethereum — the primary USDT chain by market cap
Tron — the largest USDT chain by transaction volume

Frequently asked questions

Is Tether backed by real dollars?

Tether Limited publishes quarterly attestations of its reserves. As of recent reports, the majority of reserves are held in cash and short-duration US Treasury bills, with smaller allocations to secured loans, precious metals, and Bitcoin. A full financial audit (as opposed to attestation) has not been published.

USDT vs USDC — which is safer?

USDC (Circle) has stronger regulatory posture: US-regulated issuer, monthly attestations, cash and short-duration Treasuries only. USDT is larger and more liquid globally, especially outside the US. Both have depegged briefly under stress. For US customers, USDC is often the cleaner choice; for global liquidity, USDT.

Why does USDT trade on so many chains?

Tether Limited issues USDT natively on Ethereum, Tron, Solana, and several other chains. The same USDT balance is not fungible across chains — you need a bridge to move between them. Tron is the largest single chain for USDT by volume due to cheaper fees.

Can Tether freeze my USDT?

Yes. Tether Limited has the technical ability to blacklist addresses at the issuance layer. It has done so in response to law-enforcement requests and hacks. This is a real difference from truly decentralized assets like Bitcoin or ETH.

Sources

Tether transparency reports — accessed Sep 14, 2026