Recently, a friend asked me about contract trading, and I found that many people actually can't distinguish the difference between USDT-margined and coin-margined contracts. I previously wrote an introductory article, and today I want to give everyone a more systematic overview, especially for those who want to deepen their understanding.

First, let's state the conclusion: Cryptocurrency contract trading is mainly divided into two major categories: USDT-margined contracts and coin-margined contracts. Exchanges typically offer three types: perpetual USDT-margined, perpetual coin-margined, and delivery coin-margined, suitable for different trading styles.

I'll start with USDT-margined perpetual contracts. These contracts use stablecoins (like USDT or USDC) for pricing and settlement, with no expiration date, making them especially suitable for traders seeking flexibility. The most common trading pairs are BTCUSDT, ETHUSDC, and so on. The advantage of USDT-margined contracts is that you don't need to convert the value of cryptocurrencies; profits and losses are directly calculated in USD, which is very beginner-friendly. The downside is that your final settlement is in USDT, which might cause you to miss out on the appreciation of the underlying asset itself. Simply put, if you just want to short-term long or short a coin, USDT perpetual contracts are the most straightforward choice.

Next is coin-margined contracts. These use the cryptocurrency itself (like BTC, ETH) as the unit of valuation and settlement, and are divided into two types: perpetual and delivery contracts. Perpetual contracts have no expiration date, like BTCUSD; delivery contracts have fixed expiration dates, such as BTCUSD0628, which specify a particular month. The core advantage of coin-margined contracts is that your profits are tied to the underlying asset, making them especially suitable for long-term holders and those wanting to hedge spot market risks. However, trading volume needs to be converted, and operations can be more complex.

Let me give you some practical scenarios. Suppose you are bullish on BTC short-term rally and want to go long with a USDT perpetual contract. You open a position at $60,000, holding 1 BTC, with 10x leverage, and a margin of 6,000 USDT. If BTC rises to $61,000, you earn $1,000 USDT; if it drops to $59,000, you lose $1,000 USDT. This is a characteristic of USDT-margined contracts: profits and losses are intuitive, suitable for short-term traders.

Another scenario: you already hold 1 BTC spot at a cost basis of $60,000 but are worried about a market downturn. You can use a coin-margined perpetual contract to open a short position as a hedge. Using 5x leverage, with a margin of 0.2 BTC. If BTC drops to $50,000, your spot position loses $10,000, but your short contract gains 0.2 BTC, partially offsetting the spot loss. This is where coin-margined contracts are most practical.

There's also a strategy involving arbitrage with delivery coin-margined contracts. For example, if you find that the BTCUSD0627 contract is priced at $59,000, but the spot price is $60,000, indicating a discount. You buy the contract, and at expiration, it will settle at the spot price. If the spot remains at $60,000, you profit the difference of $1,000; converting that into BTC is roughly 0.0169 BTC. This operation is suitable for experienced traders.

For beginners, I recommend starting with USDT-margined perpetual contracts, as they are simple to operate and have relatively controlled risks. Once you have a deeper understanding of market fluctuations, you can consider using coin-margined contracts for hedging or value enhancement. During volatile market conditions, USDT contracts can effectively reduce the risk of large swings. But if you're a long-term holder or institutional investor, coin-margined contracts might be more suitable.

Choosing which contract type depends not only on personal preference but also on the current market situation. My comprehensive learning materials are already organized into a collection. If you're interested, you can check the pinned post on my homepage, which contains systematic explanations from beginner to advanced levels.