A decision by Mosaic Co. to cut production because of slower-than-expected sales of fertilizer weighed on its shares for a second day Wednesday.
The company's stock lost another 5.6 percent of its value, extending its loss to 12.2 percent since it announced the move late Monday.
Mosaic said that crop nutrient demand had fallen both in the U.S. and overseas since executives last gave investors an update on the company's performance in early August.
"The long-term positive outlook for crop nutrient demand has not changed, but the industry faces some near-term challenges in the current environment," said CEO Joc O'Rourke in a statement.
Currency volatility, lower commodity prices and macroeconomic uncertainties were also affecting the business, the company said.
Morgan Stanley analyst Vincent Andrews said he was not surprised about Mosaic's announcement because of overall weakness in the potash market. Andrews lowered the stock's price target from $50 to $42 but did not downgrade his rating of "overweight."
"However, our absolute outlook on the stock remains tempered by poor potash market fundamentals, which we do not see as improving in the near term," he said in a report.
Additionally, the overall ag environment "continues to be challenging" as a result of volatile foreign exchange rates and low crop prices, Andrews said.