Originally posted by TOM4CWB
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The reason for the collar compared to being short is to keep an additional $100/t upside potential gain in place in exchange for the added $100/t risk.
The short at $910 is a better plan if you think the market is more likely to fall than rise. The collar would make more sense if you expected the opposite but still wanted to limit your risk.
As far as cash flow and margin requirements go, I'm not sure where you got the initial margin requirement of $50/t from compared to the minimum I see and have used in this example of $79.50/t.
If you want to use your $50, then the margin requirement when the call was worth $75 and the put $25 would be up to $50+(75-25)=100/t.
I would suggest keeping net price and margin requirement considerations separate for clarity.
Hope that helps.
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