Calithera Biosciences Adds To Wednesday's Gain

Calithera Biosciences Inc CALA shares are trading higher by $1.25 (9 percent) at $12.85 in Thursday's session. That comes on top of Wednesday's gain of $2.60, when it moved up from Tuesday's close of $9.00 to $11.60. There has been no specific news to account for the 55 percent gain since Tuesday.

After a higher open, it had a brief retreat to $11.08 before continuing its move higher. Once it surpassed Wednesday's high ($11.60), the pace of the rally accelerated. The ensuing rally has taken the issue to $13.70, which matches its April 24, 2015 high. Since reaching that elevated level, the issue has slipped back into the $12.00 handle.