I found the answer to my own question for those who want to know:
ETF = 2 point wingspan
Index Fund = 10 point wingspan
Also, I was using the wrong terminology in my original post.
Wingspan: The distance between the strikes making up the wings of the order (the outside pairs). This must be...
In a credit spread strike price width, especially in the case of iron condors, i notice that most people use a difference of 10 between the long and the short. (125/135)
I was doing some math and found I got a much better return on margin with closer strike prices. (133/135)
A 2 point...