Just a quick reminder of what this thread is about:
People who trade iron condors are usually taught to select short strikes at one standard deviation from the current price action.
I think extrapolating option volatility to "monthized" levels is not optimum.
What I want to do in this thread is select hypothetical strike levels, assuming that an iron condor is put on on the expiry Friday of the previous cycle. Some people like to initiate ICs with 2 months to expiry, so we'll have a look at that too.
I'll be using historic volatility, just so it can be automated.
I'll report on how these strikes are threatened or not as time goes by, to test how well this selection process works.
Note that this does not represent any trades I may be doing, it is just an exercise.
On the chart the red lines are 1 standard deviation (68% theoretical probability of staying inside).
The Blue lines are 1.28 SDs (80% theoretical probability of staying inside), which you would probably never get enough premium to trade.
The Green lines are at 0.6 SDs and represent what a low probabilty condor trader might select. It is presumed this trader is prepared to adjust more aggressively.
The assumption is that the condors are put on and left to see what happens at expiry. Remember, this is just a test.
In the real world, traders might adjust, superimpose strategies, exit early or any number of gyrations in order to capture some profit (or not as the case may be).
With expiry this Friday, it's time for another look. All the major stock indices are within the 1SD envelope, so that's a positive for the 1 SD hypothesis... well... all except for the Dow which today has punched through the upper 1SD hypothetical strike. I don't know anyone who trades ICs with The Dow, so we shall make note, but not put too much stock into it.
Russell 2000 was looking like it might give some grief, but is now safe with today's rally.
Still a few days to go, so we'll see what pans out.
Image below is SP500 1 month Nov expiry