The drama for potash producers has entered a new phase. China's sovereign fund has converted a bond holding into equity and now owns 12.5% of Uralkali, the company that started the drama when it pulled out of Belarus Potash Corp. a couple of months ago. Should investors in PotashCorp (POT), Mosaic (MOS -1.43%), and others cheer because the worry about falling potash prices is over? Or is this just another step in a story that's doing nothing but roil the markets? Watch the video below to find out.