USDT is a promise: one token, redeemable for one US dollar from Tether, the issuing company. The peg is not code — it is economics.
The reserve claim
Tether publishes attestations that each USDT in circulation is backed by reserves: US Treasury bills, overnight reverse-repo, gold, bitcoin and other assets. The composition has shifted over the years toward short-term US government paper — the most liquid collateral there is.
The arbitrage machine
The peg holds because authorized participants can mint and redeem USDT at $1 directly with Tether. If USDT dips to $0.998 on an exchange, arbitrageurs buy it, redeem at $1.00 through the issuer and pocket the difference — buying pressure pushes the price back. If it rises above $1, they mint and sell. This loop is continuous and capitalized by professional desks, which is why deviations are usually fractions of a cent and brief.
Stress episodes
During extreme fear, USDT has traded at small discounts (a cent or two at most, historically) — reflecting concern about redeemability queues rather than a broken peg, and each time arbitrage closed the gap. Watching the peg during panic is less useful than watching redemption throughput: days when billions can exit in size are the real test, and it has passed every one so far.
What it means for your wallet
In practice, your balance shown in USD treats 1 USDT = $1. Our dashboard fetches the live market price (which hovers within ~0.1% of par) for an honest equivalent, cached so a price API outage never breaks your interface. For everyday use, the peg makes USDT the unit of account for crypto-native commerce — which is also why fee efficiency on networks like Tron matters so much at scale.
