most potash stock were up in us & ca yesterday

Why does this happening do you think, while the market is going down?

Producers were all up;

Potash Corp. ..... up 2.13%
The Mosaic Co. .... up 2.03%
Agrium Inc. ........... up 1.45%
Intrepid Potash Inc. .. up 0.61%

Most of the explorers were up too ;

Allana Potash Corp. .... up 5.39%
IC Potash Corp. .......... up 2.08%
Western Potash Corp. ... up 1.72%
Encanto Potash Corp. ... down 1.69%
Passport Potash Inc. ..... 0.00%