I am surprised more people are not playing BIOF and PEIX as a running trade. They trade similarly until one hits on news and then the other strick can be used as a stabilizer.
Example: PEIX got punish for Q4 BIOF ran on the same info but it did not get hit as hard. Tomorrow the same thing might happen, but in reverse.( PEIX will run on BIOF speculation, but will not drop as much if earnings do not meet expectations)