Hello, I opened up a stock/options margin account on IB about 4 weeks ago.. and I'm noticing some funky stuff when it comes to trying to place orders...and having my orders refused due to insufficient margin. It seems that IB is always calculating the INITIAL margin requirement for all of my positions (OLD and NEW) whenever I try to put on a new position in determining what my entire margin requirement for the account is before ALLOWING or DISALLOWING an order to be accepted. This seems wrong and refuses me from placing legit orders. Other brokers will calculate the total margin requirement for an account by using MAINTENANCE margin requirements for all existing positions + INITIAL margin requirements for the new order you're placing. The effect is this in this example: Account Size: $10,008 (1st order) Buy 200 shares XYZ @ $100 / share (this is allowed..since my margin req is: $10,000) stock then falls to $99.75 / share (2nd order) Sell 2 Covered calls strike 110 (this order is rejected..because IB uses INITIAL margin requirement for my first order (long 200 XYZ) which is $9975 plus INITIAL margin requirement for Covered call order which is the premium received.) Any other brokerage would accept this order. Any other broker would use the MAINTENANCE requirement for my first position (long 200 XYZ) which is 30 - 40% of $19950 which is: $5985 - $7980 plus the INITIAL requirement for the covered calls (premium received) which is easily met.. even with the $.25 decline in XYZ. The net effect of all of this... is that the MAINTENANCE requirement in used ONLY in determining if your most recent trades are reversed..to meet the MAINTENANCE requirement. And that INITIAL margin requirements are effectively applied CONSTANTLY...and will refuse any new orders..if INITIAL req are not met for ALL of your positions..OLD and NEW. Anyone else have experience with this? Or know what's the story with margin at IB? Thanks PopRocks.