You probably got a bad quote. I don't see any reason for a gap opening today.
There was a gap-up open on Tuesday and Wednesday, but not on Thursday.
I'm showing a high for the week at 30.84 made on Tuesday, and it matched that high price today before closing at 30.41
The afterhours last trade yesterday was 32.89(+7.17%) and there was no pre-market trades this morning.
