Twitter's stock just had a wild rebound and is now up more than 9%

Shares of Twitter are bouncing back in a big way, despite the massive market selloff pressuring most tech stocks on Wednesday.

The social networking company's stock was up more than 9% to $18.24 in midday trading Wednesday for reasons that were not immediately clear. Twitter's stock had been down as much as 7.2% on Wednesday, setting a new low of $15.48.