Trader Brian Jones on Twitter: "So far it's been a tough day day trading. I made a little money on $SGBX. I could of made a bit on $RWLK but that's it. $HTZ premarket was the only big winner so far." / Twitter

So far it's been a tough day day trading. I made a little money on $SGBX. I could of made a bit on $RWLK but that's it. $HTZ premarket was the only big winner so far.