That's barely the summary information. You need to look closely at the details.
Open your margin report and examine the section titled "Portfolio Margin Details". In there you'll see the product and class groups with charges for your individual positions. Also look at the section called "Margin overview by exchange"... there might be an IB house charge if they think you've got too much exposure of a certain kind. I'm guessing you have some kind of concentration in a risky/volatile product. Naked short puts on small biotechs maybe? Lol
Anyway you clearly aren't as well hedged as you think; at least not in IB's opinion. You need to play by their rules since they're extending the funding to you. Don't shoot the messenger.
Thanks. I checked the details section and found Portfolio Group,Product Group,Bonds and Extreme Risk Additional Charge are all zero. The major part are from Class Group. The number is equal to the Maintenance Margin. Additionally Small Cap Concentration Charge contributes about half of the former.
Base Currency Summary
Portfolio Group 0.00
Product Group 0.00
Class Group 100
Bonds 0.00
Extreme Risk Additional Charge 0.00
Small Cap Concentration Charge 40
Total 140
Under the class groups, all my positions were grouped by the underlings. But no more detailed granularity. Only the sum of each group is shown. Each option is listed, but with empty numbers. The sum of the margin is equal to the number of the class group. There is also a column "Extreme", with negative value and I didn't figure out what it is used for.
Class Groups
Name Description Symbol Quantity Margin Extreme
USD
ABCD 65 -93
EFGH 35 -25
Total 100 -118
And finally the Margin Overview by Exchange
Margin Overview by Exchange
Exchanges Initial Maintenance
USD
IBHouse 50 45
OCC 62 55
Total 112 100
Yes, you are right. I was punished by concentration. But they are not small cap. They are very big companies and always in the top 10 actively trading list. Or here small cap is me?
But after all, nothing changed overnight and therefore the margin should not change a lot overnight either. No?
Any way, your advice is very valuable. Don't shoot the messenger is so true. But the messenger is vague and I struggled to understand him..