# Specifications of USDⓈ-Margined Contracts (Crypto Perpetuals & CFDs)

Category: Placing Trades › Understanding Futures Trading  
Source: https://help.coinunited.io/en/articles/specifications-of-usds-margined-contracts-crypto-perpetuals-and-cfds  
Last updated: 2026-09-30

CoinUnited.io’s USDⓈ-Margined Contracts combine two major product types under a single, USDT-settled framework:

1. Crypto Perpetual Contracts – No expiration, collateral and settlement in USDT, with a Mark Price mechanism for fair pricing.

2. CFDs on Traditional Markets – Stocks, indices, forex, and commodities, all collateralized and settled in USDT, with no expiration and no Mark Price mechanism.

Traders benefit from streamlined margins and a unified account balance in USDT, making it simple to gauge profits and losses in a stable, USD-pegged currency.

### Key Features

## 1. USDT Settlement

All positions—whether crypto or traditional assets—are collateralized and settled entirely in USDT.

This gives you direct insight into your PnL in near-dollar terms (e.g., earning 500 USDT is roughly $500).

## 2. No Expiration / Rollover

• Crypto Perpetuals: Remain open indefinitely, so you can hold long-term positions without an expiry date.

• CFDs: Also have no set expiration, meaning you can keep positions open as long as margin requirements are met.

## 3. Mark Price (Crypto Only)

For crypto perpetuals, a Mark Price is used to calculate unrealized PnL and protect against undue liquidations due to short-term volatility.

![3. Mark Price (Crypto Only)](https://cu-api.com/helpcenter/uploads/mark_price_pc_705306c2c3.webp)

![3. Mark Price (Crypto Only) (2)](https://cu-api.com/helpcenter/uploads/mark_price_app_0d62b1a50e.webp)

CFDs do not use a Mark Price mechanism.

## 4. Minimum Order Notional

For most crypto perpetuals, an order that opens a position must have a notional value of at least 100 USDT (10 USDT for a few contracts). CFDs use a minimum quantity for each instrument instead.

Orders below the minimum are rejected automatically.

## 5. Full Contract Specifications

CoinUnited.io may adjust certain thresholds or specifications from time to time without prior notice. For detailed parameters—such as tick sizes, maintenance margins, or other trading rules—please visit our:

[CoinUnited.io Contract Details](https://coinunited.io/en/trade/btcusdt-contract-details)

## Need More Help?

For further questions or issues, please visit our [Help Center](https://help.coinunited.io/) or use our chatbot for assistance.

We're here to help. Happy trading!