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Portfolio margin

  #5 (permalink)

Market Wizard
OC, California, USA
 
Trading Experience: Advanced
Platform: IB/TWS, NinjaTrader, thinkorswim
Favorite Futures: stocks, options, futures, VIX
 
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Posts: 1,925 since Jun 2009
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alchemist74 View Post
Thank u for your fast answer.

Yes i know it may vary and i have vague idea how they calculate it. I dont worry how broker calculate it coz it is what is it but what bothers me is the fact that the initial margin can be changed 2-4 times during the time of the trade.

i asked my broker but they not give me good enough answer and they say that exact formulas are secret ......

That's one of the problems with naked short options: your mask risk is infinite. If you sold a spread your risk would be measured and not change over time.

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