Let's try it this way.
STO 10 AGC Dec 130 puts @ $1, +$1,000
BTO 10 AGC Dec 120 Puts @ .5, -$500
Credit, $500, margin required, $10,000.
I'm making 500 on 10K
BTC 10 AGC Dec 130 puts @.5, -500
STO 10 AGC Dec 140 puts @ $1, $1,000
I gave back the original $500, and took in $1K,
I'm...