Closing Glance: Shares of agricultural chemicals decline

Shares of most agricultural chemical companies declined on Tuesday, after an RBC Capital Markets analyst downgraded shares of Potash Corp. of Saskatchewan on a run-up in the stock price.

Analyst Fai Lee downgraded the stock to "Outperform" from "Top Pick," and said shares may settle following recent good news.

Here's how shares of major agricultural chemical companies fared Tuesday:

DuPont Co., down 51 cents to $48.67.

Dow Chemical Co., up 6 cents to $40.10.

Potash Corp., down $12.01, or 6.2 percent, to $181.49.

Mosaic Co., down $5.62, or 4.5 percent, to $118.06.