This week, 5 Chemicals stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Terra Nitrogen Company, L.P.’s (TNH) ratings are up from a C last week to a B. Terra Nitrogen Company, L.P. is a producer and distributor of nitrogen fertilizer products. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of TNH stock.

Stepan Company’s (SCL) ratings are looking better this week, moving up to a A from last week’s B. Stepan Company produces specialty and intermediate chemicals that are sold to other manufacturers. The company also gets A’s in operating margin growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of SCL stock.

Tredegar Corporation (TG) boosts its rating from a C to a B this week. Tredegar Corporation manufactures plastic films, elastics and laminate materials, mainly for personal and household care products and packaging and surface protection applications. The company also gets A’s in earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of TG stock.

This week, FutureFuel Corp. (FF) pushes up from a C to a B rating. FutureFuel Corp. produces biobased products, including biofuels, and biobased specialty products. The company also gets A’s in operating margin growth, earnings growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FF stock.

Chemours Co. (CC) is seeing ratings go up from a C last week to a B this week. The company also gets A’s in earnings revisions, earnings surprise, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of CC 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.