USDT Deep Dive: How the Largest Stablecoin Works

USDT (Tether USD), commonly known as Tether, is currently one of the largest U.S. dollar stablecoins. As of August 2026, CoinGecko’s USD stablecoin category data shows that USDT remains the largest stablecoin by market capitalization. Understanding how USDT works means looking beyond the idea of a simple “digital dollar.” It requires understanding how reserve assets, issuance and redemption, market arbitrage, and multi-chain circulation work together to support its $1 peg, while also recognizing risks related to reserves, depegging, and on-chain transactions.

What Is USDT: How Is It Pegged to the U.S. Dollar?

USDT, also known as Tether, is a stablecoin issued by Tether and designed to maintain a 1:1 peg to the U.S. dollar. According to Tether, USDT in circulation is supported by its reserve assets, with the goal of maintaining a value of approximately $1 per USDT.

However, this does not mean that USDT will always trade at exactly $1 on the secondary market. Its market price is still influenced by supply and demand, liquidity, and market confidence, which means it may temporarily trade at prices such as $0.99 or $1.01.

The key to understanding how USDT works is distinguishing between its “target peg” and its “market trading price.” USDT seeks to keep its market price close to $1 over time through reserve backing and the price discipline created by primary-market issuance and redemption, rather than through a smart contract that technically fixes the trading price at exactly $1.

How USDT Works: Issuance, Redemption, and Arbitrage

The basic USDT process can be summarized as reserves, issuance, circulation, and redemption.

It is important to note that Tether distinguishes between “authorized but not issued” USDT and USDT that has actually entered market circulation. Authorized but not issued tokens have already been created on the blockchain but remain in the Tether Treasury and are not counted as part of the circulating supply. Only tokens that have entered actual circulation are considered issued tokens.

When eligible customers make primary-market purchases, USDT can move from Tether’s inventory into circulation. When redemptions occur, the corresponding tokens may be returned to the Tether Treasury. Tether also states that it may occasionally burn USDT to reduce the number of authorized tokens on a particular blockchain.

Market arbitrage is another important part of how USDT works. If USDT trades below $1 and the market continues to trust its reserves and redemption mechanism, the discount may attract buyers. If USDT trades above $1, the opposite incentive may emerge. Issuance, redemption, liquidity, and arbitrage together help move the market price back toward its target peg.

What Are USDT Reserves?

A common misconception about USDT reserves is that every USDT is backed by a physical $1 bill held in a bank. According to Tether’s disclosures, its reserves include traditional currencies, cash equivalents, and other assets. A more accurate way to understand the reserve structure is that a portfolio of different asset categories collectively supports the USDT in circulation.

Tether currently publishes information on circulating supply on a regular basis and releases quarterly reserve reports. The Q2 2026 reserve attestation, published in July 2026, was completed by BDO. On August 13, 2026, Tether also announced that KPMG had issued an independent audit opinion on Tether International’s 2025 financial statements. Reserve attestations and annual financial statement audits are different forms of disclosure and should not be treated as the same thing.

In addition, USDT operates across multiple blockchain protocols. USDT on different networks should not be treated as freely interchangeable simply because the token name is the same. When making a deposit or withdrawal, users should make sure that the sending network matches the network supported by the receiving platform. MGBX’s existing deposit guides also instruct users to verify the correct blockchain network and address for USDT.

FAQ

• Is USDT always equal to $1?
  No. $1 is USDT’s target peg. Its secondary-market price may temporarily move above or below $1 due to changes in supply, demand, and liquidity.

• Are all USDT reserves held in U.S. dollar cash?
  No. According to Tether’s public disclosures, its reserves include cash, cash equivalents, and other categories of assets. It is therefore inaccurate to assume that every USDT corresponds directly to $1 in cash held in a bank account.

• Can TRC-20 USDT and ERC-20 USDT be transferred directly between networks?
  Different networks should not be treated as the same transfer channel. Before sending USDT, users must confirm that the receiving address and platform support the selected network. Choosing the wrong network may result in funds not being credited properly or becoming difficult to recover.

• Does Tether charge USDT transfer fees?
  On-chain USDT transfers typically require users to pay the network fees of the underlying blockchain. If USDT is withdrawn through a trading platform, the platform may also charge a separate withdrawal fee. The total cost therefore depends on both the blockchain network and the platform’s fee structure.

• What are the risks of holding USDT?
  Key risks include depegging, reserve and issuer risk, regulatory changes, trading platform risk, and operational risks such as selecting the wrong address or blockchain network.

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The process for trading on MGBX:

1. Register a trading account and complete the necessary identity verification;

2. Deposit funds and select a trade type;

3. On the cryptocurrency trading page, enter the amount or quantity of the cryptocurrency you wish to purchase;

4. Confirm the order to complete the trade, and check that your assets have increased accordingly.

Further Reading:

Stablecoins Explained: The Differences Between USDT, USDC, and DAI

Why Stablecoins Matter: The Foundation of the Crypto Market

How Do Stablecoins Maintain Price Stability? Comparing Three Mechanisms