FYI: The CBOE Margin Manual (PDF) can be found in this thread: https://www.elitetrader.com/et/thre...rgin-requirements-w-r-t-options-sales.370425/ A recent version from November 2021, as well a very old, classic version from April 2000 [good for historical studies ]
Here I explained (for a simplified case) the calculation of the "CostBasis" when shortselling a Put. https://www.elitetrader.com/et/thre...ents-w-r-t-options-sales.370425/#post-5698950 Ie. this formula usually gets used in CashAcct when shortselling a Put: CostBasis = Strike - Premium Using that result and available cash one can calculate how many contracts one can open. Of course in reality one has to multiply by 100 b/c each contract means usually 100 shares (exceptions possible, depending on the underlying).
Good info about option spreads: https://www.investopedia.com/articl...ich-vertical-option-spread-should-you-use.asp https://en.wikipedia.org/wiki/Options_spread
@Robert Morse , thanks for the info. I got a similar message from IBKR telling me that I have exceeded the 390 limit. This is a real pain for me cos I do a lot of cancel/re-submit of orders on a daily basis and my limit will easily be exceeded every day. I'm now on the 'naughty step' for this quarter and have to suffer the consequences, that you mentioned. I don't even mind the higher fees; but the idea that my fills will worsen is just outrageous. As someone who works in the industry, what is the reason for this rule by the exchange? Why are they penalising the customers who bring in THE most volume and trades into the markets? Surely, we are generating a lot of business for the brokers/exchanges as opposed to someone who puts in 1 order a month? Is there any way to deal with these measures?
@ffs1001, I think the rule is on a per account basis... so you could use multiple accounts, IMO. To be on the safe side, you should give a "role" to each acct, in case someone asks... For example "bot1", "bot2", ...
Here a guy who made some videos about his options rolling: https://www.elitetrader.com/et/threads/the-1-skill-in-selling-options.370521/ Unfortunately too many ads in it... Barf!
Here I started this IMO interesting thread about risk-reduction methods regarding IV-risk and price-risk : Eliminating Half Of The Risk - A Practical Options Research It's primarily about static methods by using an appropriate option strategy (like option spreads etc.) Later postings there also show dynamic risk reduction methods like delta-hedging etc.
How I use the PnL diagram for calculating a PositiveArea% that can be used as the probability for success: https://www.elitetrader.com/et/threads/is-there-a-tool-to-pick-the-best-option.370791/#post-5708727 Instead of using "-3SD to +3SD" I'm using "-3SD to +150%" : https://www.elitetrader.com/et/thre...-stddev-in-last-20-years.370854/#post-5709670 How to calculate (cumulate) the Greeks (Delta, Vega, Gamma, Theta, Rho etc.) for a multi-leg position: https://www.elitetrader.com/et/threads/counting-the-greeks.370842/ How to simulate option trades using the optioncreator web tool: https://www.elitetrader.com/et/thre...-term-and-iv-change-risk.370740/#post-5707737 Another thread about "IV risk", ie. the undesired rise of the IV, especially when shortselling, (or undesired fall of the IV when position is long): https://www.elitetrader.com/et/thre...-term-and-iv-change-risk.370740/#post-5707359 Why one needs to use an options scanner (options screener) for finding good trade candidates: https://www.elitetrader.com/et/threads/is-there-a-tool-to-pick-the-best-option.370791/#post-5708722 https://www.elitetrader.com/et/thre...ck-the-best-option.370791/page-2#post-5708788
Here my PROOF why the Cox-Ross-Rubinstein option pricing method used in IB's option pricing calculator is WRONG/BUGGY: https://www.elitetrader.com/et/thre...nteractive-brokers.370840/page-3#post-5709708