BYDFi supports several types of perpetual futures contracts.

At first glance, names like USDT-M, USDC-M, and COIN-M can look very similar.

The main difference is the asset used for margin and settlement.

BYDFi currently supports all three formats.

# USDT-M Futures

USDT-M contracts use USDT as the margin and settlement asset.

This means:

• margin is provided in USDT;
• profits and losses are calculated in USDT;
• users trade from the USDT-M futures account.

For users who already manage most of their trading balance in USDT, this creates a straightforward stablecoin-based futures workflow.

# USDC-M Futures

USDC-M contracts use USDC as the settlement asset.

They provide another stablecoin-based perpetual futures option for users who prefer using USDC rather than USDT.

# COIN-M Futures

COIN-M contracts work differently.

Instead of using a stablecoin, the contract is margined and settled with the relevant cryptocurrency.

For example, BYDFi explains that a BTCUSD COIN-M perpetual contract is placed and settled in BTC.

This gives traders a coin-margined alternative to stablecoin-based futures.

# Quick Comparison

# Why Offer Different Contract Types?

Different traders organize their futures balances in different ways.

Some prefer stablecoin-based contracts such as USDT-M or USDC-M.

Others may prefer coin-margined contracts where settlement is handled in the cryptocurrency itself.

Supporting several contract formats gives BYDFi users more flexibility in how they structure perpetual futures trading.

# Simple Way to Remember It

USDT-M → USDT-based

USDC-M → USDC-based

COIN-M → crypto-based

That is the simplest way to understand the difference.