Dont think any of the actual market curbs were ever hit. You might be thinking of automatic orders to buy or sell. These hit some sort of crescendo today. I think they are still trying to figure it out.
I agree...I think there were a lot of automatic sells hit, and that had an impact. We forget how truly huge this market is now. Good economic news, market pissed- low interest rates aren’t forever, no matter what Obamsoros wants.