The calculation of "exposure" is opaque (using âproprietary algorithmsâ), yet IB chat tells me that itâs based on the âStress Testâthat can be viewed under "Manage Account".
That "Stress Test" categorizes by "equities", "commodities", "fixed income", and fx, which sounds reasonable, but if you hold an etf like TLT, that goes into "equities" simply because it trades as a stock. That makes no sense.
Then within those categories it applies a 30% haircut to all positions ---including very lower volatility positions like ticker IEF â which is an etf holding 7-10 year treasuries. Presumably even ticker SHY, which holds t-bills, would get the same haircut.
So at an extreme, I could be holding t-bills in the form of SHY, and it will assess me a 30% "equities" exposure on that position.
Of course it's possible the chat rep was mistaken.
Your analysis is correct, and much further below is some more of my own.
Excluding the calculation done to your âcashâ holdings, all other positions (and your account) are recalculated in the event of a 30% down move, with what appears to be no bias toward underlying risk â equity index, stock, bonds, options, futures, and so forth are all equal in this case. This is not proprietary, and can indeed be viewed in the stress test report.
The 30% up move (+30%) calculation appears to not be important with regards to the exposure fee, even if it creates exposure in the account, and furthermore, exposure higher than the -30% calculation of which you may or may not have been charged the actual fee.
The only proprietary calculation is when and how much of a fee is charged. However, I have posted a guideline previously which starts at the $1 million mark of exposure and goes higher. Other members on the forum have commented this is an exponential fee; it rises on an exponential basis.
Due to its proprietary nature itâs difficult to fully explain, however, my recent account scenario might shine some light on the maximum amount of exposure allowed before the fee is posted to accounts, if this fee is calculated on a pure dollar for dollar exposure amount (so account size, product, position concentration are irrelevant).
The last few trading days have had the following -30% and +30% exposures, with the fee charged next to it (if applicable, and numbers in Canadian dollars);
(Report Date) Jul 9 â (-30%) 131,582.53, (+30%) 201,230.66, (Exposure Fee) no exposure fee charged
Jul 10 â 133,547.25, 196,551.05, no exposure fee charged
Jul 11 â 137,158.01, 193,443.78, no exposure fee charged
Jul 12 â 137,158.20, 193,444.46, 1.08 charged
Jul 14 â 131,469.65, 205,466.49, no exposure fee charged
Comments;
1. Iâm not sure why July 11 and 12 are essentially the same, the 12 being Saturday and only that one is charging me a fee, but looking beyond that;
2. It appears that the maximum -30% exposure is somewhere between 133,547.25 and 137,158.20 before the fee kicks in. If true, this is good information to know and can be used to expect (or not) the fee to be charged to your account the next day.
3. Iâve had all days with much larger +30% exposures, none of which seem to matter with regards to the fee calculation â however this is by no means proof it is not.