MARKET PULSE-Potash companies, Orthofix, Stereotaxis, Spirit Airlines
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July 30 (Reuters) - Some U.S. stocks to watch on Tuesday:
** MOSAIC CO, Monday close $52.96, down 15 pct premarket
** POTASH CORP, Monday close $37.90, down 13 pct premarket
** CF INDUSTRIES HOLDINGS INC, Monday close $202.3, down 4 pct premarket
Global potash prices are expected to fall by 25 percent after Russia's Uralkali dismantled one of the world's largest potash partnerships by pulling out of a venture with Belarus Potash Co.
Uralkali said the decision might lead to a fall in global potash price to below $300 per ton in the second half of 2013 from $400 per ton now. Continued...