What are USDT contract and USD contract?

The difference between a USDT contract and a USD contract lies in their pricing units and trading methods.

A USDT contract is a derivative contract that uses a stablecoin (typically a USD-pegged stablecoin like USDT) as its pricing unit. Traders use stablecoins for trading in U-based contracts, and profits and losses are also calculated in stablecoins. This type of contract is suitable for traders who prefer to trade and manage risks with a fixed value.

A coin-based contract is a derivative contract that uses a cryptocurrency (such as Bitcoin, Ethereum) as its pricing unit. Traders use cryptocurrencies for trading in coin-based contracts, and profits and losses are also calculated in cryptocurrencies. This type of contract is suitable for traders who prefer to trade based on cryptocurrency benchmarks.

In summary, U-based contracts are priced in stablecoins and are suitable for traders pursuing a fixed value, while coin-based contracts are priced in cryptocurrencies and are suitable for traders pursuing cryptocurrency benchmarks.