Comments: The one rung I couldn't strike improve very much with duration, so opted to let this rung go to assignment.
I collected a total of 10.46 in credits (See Post Below), so the way I generally look at assignments is that the credits collected of10.46 ($1046) represent a realized gain. Unfortunately, the difference between the strike price (300.00) and current price (275.42) is that it is an unrealized loss. For purposes of tracking my cost basis post-assignment, I look at the strike at which I was assigned as my cost basis going forward, which starts out at 300.00, with credits received in short call premium reducing that over time.
I'll look at selling a call against on Monday at the 300 strike, targeting the expiry that is going to pay me 1% or greater of the strike price in credit. Currently, that would be the December 16th 300, paying 5.13, but we'll see what the market does with the underlying post-mopex.