They say on many tutorials, for vertical spread
buy 105 CALL sell 100 CALL
Let's say i have no positions at all. I can't understand how can i sell something that i do not have. In this case i'm talking about 100 CALL.
Is this something that works only with margin account?
Submitted February 19, 2017 at 02:54AM by zx636c http://ift.tt/2mb3grI
