Trader Brian Jones on Twitter: "I'm so mad right now that I didn't jump back in long on that 26 S&P point drop at the open. Hard to see the big drop and big rebound in advance. I couldn't do it." / Twitter

I'm so mad right now that I didn't jump back in long on that 26 S&P point drop at the open. Hard to see the big drop and big rebound in advance. I couldn't do it.