ROP (return on premium) is stupid when looking at the return for shorting options. If your options were all of a sudden worth 50 dollars would you consider that a 1000 percent loss?
I don't care if you think it is stupid, but that is how I calculate it.

And by the way an IC isn't just plain shorting options. It is shorting with a stop loss.
The position at 50 would be a 22% loss. (50-41)=9 where I consider 41 to be 100%.
Simplifying it, risking 3 to gain 2.
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