Amyris (AMRS +4.9%) pops after Piper Jaffray upgrades the stock to overweight, citing a...

|By:, SA News Editor

Amyris (AMRS +4.9%) pops after Piper Jaffray upgrades the stock to overweight, citing a potential earnings boost over the next three months from the consummation of a joint venture with Total (TOT +0.8%).