Intrepid Potash (IPI) shares soared 8.4% in the last trading session to close at $31.14. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 4.2% loss over the past four weeks.IPI’s rally reflects optimism over favorable potash market fundamentals and healthy demand for potash and its specialty fertilizer, Trio. Higher demand for key products is expected to drive IPI’s volumes. It saw a 25% increase in potash sales volumes to 69,000 ...