Opening (IRA): SPX July 9th 3910/3960 Short Put Vertical

... for a 4.10 credit.

Comments: Instead of moving the spread in to force a given credit (which is what I did previously), selling the 16 and buying the 13 delta strikes here, in essence dollar cost averaging into the market. 8.93% ROC at max/77.6% annualized; 4.47% ROC at 50% max/38.8% annualized at 50% max.