Seriously - you almost have to laugh when you see #'s like this.
There's actually a 1M volume bar on the 15 mins. Funny.
Most of it was in the first hour and within a 10 minute period after the ISDA.
Nothing really moves after say 10am and thru ~3:30pm. All that inbetween crap is the bots going back and forth and stocks/ETF move just pennies each way.