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    Does TWS support multiple cpu cores?

    TWS is a multithreaded application; hence, it is using multiple cores.
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    IB maintainance margin question

    We reserve 15 minutes to allow liquidation of non-compliant accounts.
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    Futures broker for Canadians?

    I am curious why you are saying that IB does not work with Ninja. I see this http://ibkb.interactivebrokers.com/node/1978 and this http://www.ninjatrader.com/ConnectionGuides/Interactive-Brokers-Connection-Guide.
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    Portfolio Margin

    It is straightforward. We will charge MAX(15%, 5 STD) on these stocks. There are no risk offsets for these instruments. 5 STD is 5 standard deviations on 30 last trading days period.
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    Portfolio Margin

    Hard to tell not looking into your portfolio. I can check if you PM me your account id.
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    Portfolio Margin

    Maverick, I am not advising stock leveraging but one can definitely do it in PM effectively with a diversified portfolio. Whistlingleaf, are you asking about preferred stocks? Can you provide an example of the instrument you are talking about?
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    Portfolio Margin

    Yes, we do, but we also ask concentration margin on options. We will charge through your nose if you have a bunch of options on one underlying. Is not it right thing to do?
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    Portfolio Margin

    Maverick, IB does not separte stock risk from option risk in PM. MoreLeverage, You probably put just 2 or 3 positions into your portfolio. 1:3 is a sign of concentration.
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    IB take-over

    How exactly you come to this bright conclusion?
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    IB Auto-Liquidation (Hypothetical Senerio)

    We do use a proprietary mechanism that will prevent this scenario.
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    Peterffy to "gradually" retire

    Read the interview. It already has an answer to your question.
  12. I

    IB and margin reports.

    It is not just set of formulas. It is a large amount of pre-calculated numbers such as covariant values.
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    IB and margin reports.

    We do not have a simple concentration test. It is all coming to crunching of a lot of numbers. Roughly speaking, if you have 6 or more groups with about equal margins, concentration should no be your concern. What is the adjustment to margin amount?
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    IB's day / night margin for emini

    I doubt we will do something like that.
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    IB's day / night margin for emini

    Yes, 4pm EST for ES contract.
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    IB's day / night margin for emini

    1. Maintenance 2. 15 minutes
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    IB and margin reports.

    ETF is max(15%, 5 standard deviations). It is less for broad-based indices (SPY, QQQQ, etc.)
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    IB and margin reports.

    These groups are creations of the OCC. We are using their margining technology called TIMS. You can Google OCC TIMS for further information. We modified TIMS to satisfy our own risk criteria. For example, we are using maximum of 15% and 5 standard deviations for stock derivatives as an opposite...
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    IB symbology?

    Try ES and EUR and pick right items from the menu.
  20. I

    Best firm for options order execution?

    Options12, Out of curiosity, are you IB customer?
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