This week, the overall grades of 7 Chemicals stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Eastman Chemical Company (EMN) earns a D this week, moving down from last week’s grade of C. Eastman Chemical Company is a specialty chemical company that manufactures and sells a portfolio of chemicals, plastics and fibers. For more information, get Portfolio Grader’s complete analysis of EMN stock.

This week, Albemarle Corporation (ALB) drops from a C to a D rating. Albemarle Corporation develops, manufactures, and markets specialty chemicals for the polymer additives, catalysts, and fine chemicals markets. The company also gets F’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of ALB stock.

This is a rough week for Innophos Holdings, Inc. (IPHS). The company’s rating falls to F from the previous week’s D. Innophos Holdings, Inc. produces phosphate salts, acids, and related products. For more information, get Portfolio Grader’s complete analysis of IPHS stock.

Huntsman Corporation (HUN) gets weaker ratings this week as last week’s D drops to a F. Huntsman Corporation manufactures differentiated and commodity chemical products. The company also gets F’s in operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HUN stock.

This week, Ferro Corporation’s (FOE) rating worsens to a D from the company’s C rating a week ago. Ferro Corporation produces and sells specialty materials and chemicals in the United States and internationally. The company also gets F’s in operating margin growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of FOE stock.

CVR Partners, LP (UAN) slips from a C to a D this week. CVR Partners, LP engages in the production, distribution, and marketing of nitrogen fertilizers in North America. The company also gets F’s in sales growth, earnings growth, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of UAN stock.

ICL-Israel Chemicals Ltd. (ICL) experiences a ratings drop this week, going from last week’s C to a D. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of ICL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.