Quote from rallymode:
Because you are wasting edge. I don't want to get into synthetics as that has been beaten to death but generally you want to try to have as few legs on as possible and make as fewer adjustments as possible in order to achieve your desired risk exposure. With an instrument like the SPX and RUT, i am surprised this doesnt get mentioned more. Nothing beats running a cleaner book. You guys aren't trading with order flow, you should be holding onto as fewer strikes as possible instead of adding positions on top of one another to offset risk.
RM,
Did you refer to static hedging here (i.e. open a debit spread on top of credit spread in the same time)? If yes, I agree with you.
However, as time passes, if my credit spread doesn't look good, I will choose hedging it by adding one leg instead of closing or reducing the size of the credit spread. By using one leg addition, you don't lose as much slippage as closing both legs of the spread.
I understand it is easier to manage a clean book. I had a problem of managing a book with over 20 legs this month because I kept adding legs to hedge against my existing positions as the market condition kept changing everyday.
I don't know exactly if it would be better for me to just close my "bad" credit spread because I haven't really made the comparison. I "think" I lost less "edge" by choosing to hedge it dynamically.