The grades of 10 Chemicals stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, NewMarket Corporation’s (NEU) ratings are up from a C last week to a B. NewMarket Corporation develops, manufactures, and blends fuel and lubricant additives marketed worldwide to refiners and others who sell petroleum products. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of NEU stock.

Sherwin-Williams Company (SHW) improves from a C to a B rating this week. Sherwin-Williams Company manufactures, distributes, and sells paint, coatings and related products to professional, industrial, commercial, and retail customers. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SHW stock.

Minerals Technologies Inc. (MTX) earns a B this week, jumping up from last week’s grade of C. Minerals Technologies Inc. is a resource- and technology-based company that develops, produces, and markets a range of specialty mineral, mineral-based, and synthetic mineral products and supporting systems and services. For more information, get Portfolio Grader’s complete analysis of MTX stock.

This week, Cabot Corporation (CBT) pushes up from a B to a A rating. Cabot Corporation is a global specialty chemicals and performance materials company. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of CBT stock.

Kraton Corporation (KRA) shows solid improvement this week. The company’s rating rises from a B to a A. Kraton Corporation produces engineered polymers and styrenic block copolymers. The company also gets A’s in sales growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of KRA stock.

Sociedad Quimica Y Minera De Chile S.A. Sponsored ADR Pfd Class B (SQM) gets a higher grade this week, advancing from a B last week to a A. Sociedad Quimica Y Minera De Chile S.A. Sponsored ADR Pfd Class B produces and distributes fertilizers, iodine, lithium and other industrial chemicals. For more information, get Portfolio Grader’s complete analysis of SQM stock.

Huntsman Corporation (HUN) is seeing ratings go up from a C last week to a B this week. Huntsman Corporation manufactures differentiated and commodity chemical products. The company also gets A’s in earnings growth, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of HUN stock.

This is a strong week for Chemours Co. (CC). The company’s rating climbs to A from the previous week’s B. 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.

Ferro Corporation (FOE) boosts its rating from a C to a B this week. Ferro Corporation produces and sells specialty materials and chemicals in the United States and internationally. The company also gets A’s in earnings growth, earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FOE stock.

Tronox Ltd.’s (TROX) ratings are looking better this week, moving up to a B from last week’s C. Tronox Ltd. produces and markets titanium dioxide. For more information, get Portfolio Grader’s complete analysis of TROX 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.