On IB remember to set your Smart Routing option to Highest Rebate, 80% of the time routes me to NASDAQOM and with rebate costs about 30 cents per...
Just curious, why don't you just sell naked puts on the stocks you have instead of going long and short the calls? its saves you the commissions...
Did you have portfolio margin? I was short a large amount of OTM SPY puts at IB and got hit hard on excess margin but never had any liquidation...
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