Quote from hey825:
It is credit fly, just like qqqq 38/39/41 calls at +1/-2/+1 as an example.
You could always do the synthetically equivalent debit fly. Margin differences between IB and ToS will not be any different in that case e.g.
1425/1475/1500 all PUTs or all CALLs
This is the same risk profile as your iron fly. The credit you receive on the iron fly is a result of the short box element. There is no benefit to it over the debit fly other than potential slippage on DITM legs for the natural fly.
The debit for the fly will be the same $ amount as the reduction in your option buying power at ToS for the iron fly. Just a suggestion.
I think IB and FBI should be ranked at the same level as "diffifulty in talking with".
LOL. Well it depends who you speak to. I favor the live chat facility as it allows you to prepare and write things down clearly and in detail which I feel is an advantage over voice chat in certain situations.
IB has its own strenght such as execution and commission...Want to know why you think IB and TOS is not apple to apple.
Well, you've mentioned a couple. The main difference is that ToS is
highly specialized in the area of US equity options trading. This is reflected in the options-oriented software and options-oriented customer support.
IB offers access to a plethora of markets and products worldwide. It's an entirely different animal. More a jack of all trades but also master of deep discount. IB even has skew modelling capabilities that ToS does not (at least on their retail platform).
Lastly, if you are genuinely concerned about margin, then you might want to consider options on futures e.g. NQ for your equivalent to NDX. These receive SPAN margin treatment which is risk-based versus Reg-T used for equity options. SPAN treatment for flies will be superior to the equivalent Reg-T requirement.
IB offers options on futures through Globex. ToS does not - their clearing firm, Penson, is yet to support this.
Once again, I am a very happy client of
both brokers. I see no reason to be overly zealous advocating/defending one broker or another as seems to be the case for a few ET members.
MoMoney.