The calculation of IM and MM for USDT margined perpetual is as follows:

Initial Margin = Notional Position Value / Leverage Level

Maintenance Margin = Notional Position Value * Maintenance Margin Rate - Maintenance Amount

Please be aware that in the event of extreme price movements or deviation from the price index, BIT will undertake additional protective measures, including but not limited to:

1. Adjust maximum leverage value - Refer here

2. Adjust position bracket in each tier

3. Adjust maintenance margin rate in each tier

Click here for more information about the perpetual leverage-margin.

Note: USDT margined perpetual swap is only available under the unified margin mode, you can choose non-borrowing mode or borrowing mode to trade.

Non-borrowing mode: You need to have sufficient USDT balance as margin for placing and holding positions.

Borrowing mode: There must be sufficient USDT total margin balance in the account level for placing and holding positions.

Click here for more information about the unified margin mode.