Isn't a collar just a glorified put credit spread?

why bleed $ though? a collar is theta neutral since he is short call?
The distance between the long put and the short call can be substantial. If the stock falls slowly toward the long put you're losing money on the underlying with no corresponding gain on the put.
 
yep. asymetrical distance of the strikes would do it.. although the skew shifting would mitigate some ..together with vol shift as ticker goes down.
 
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