My system happened to be shorting two contracts of crude oil last week. Over the weekend, I receive an email threatening to charge $0.59 per contract per day if I don’t liquidate those positions in 4 days. The emails says that my worst exposure is $102,906, which in my case is for two contracts of crude oil. So I suppose IB thinks crude can rise from $57 to $108 over some weekend.
The email says “Exposure will be calculated for accounts based upon open positions at the end of business…