30% of the daily interest is added to Insurance Funds (Margin) every day to handle the bankrupt positions. BFX Exchange reserves the rights for future use of the funds.
If the Insurance Fund (Margin) is insufficient to cover the remaining portion of the bankrupt positions, BFX Exchange will then pay for this portion. Under such circumstances, your BFX Exchange account is in debt with withdrawal function disabled. To clear your debt, you can either deposit funds to your Margin account or wait for Insurance Fund to be sufficient again which will pay off debts in chronological order.