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Re: Inconsistent behaviour of WHATIF orders


 

On Mon, Apr 26, 2021 at 05:31 PM, Despair wrote:
I started with just one contract - result zero. Then I started increasing the position size. Two contracts - still zero.
3 contracts - now I suddenly got a nonzero maintenance margin change although it was much too low. When I went to 4 contracts the margin increased but still it was not what I would expect (or what IB would require from me).
Could it be possible that you already have some positions, for example short calls, and selling 1-2 puts would not increase the margin requirement.? but when you are selling 3-4, it brings more risk on the other direction and therefore the margin increases.?

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