(It's been awhile since I posted anything here.) I was cleaning up my disk and ran across a file called "box.jpg". It's just a picture the looks to be two butterflies initially, a call fly just below current underlying price and a put fly just above. There is an embedded box in the middle. There are a few adjustments shown. It is signed by "Carl T. Knox". I have no idea where it came from. Is anyone familiar with this? I have tried searching but haven't found anything here or on the web.
