This week, 11 Chemicals stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

International Flavors & Fragrances Inc. (IFF) earns a A this week, jumping up from last week’s grade of B. International Flavors & Fragrances Inc. creates, manufactures, and supplies flavors and fragrances for the food, beverage, personal care and household products industries. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of IFF stock.

This week, Monsanto Company (MON) pushes up from a C to a B rating. Monsanto Company provides agricultural products for farmers. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of MON stock.

This week, Syngenta AG Sponsored ADR’s (SYT) ratings are up from a B last week to a A. Syngenta AG Sponsored ADR is an agribusiness that is engaged in the discovery, development, manufacture and marketing products designed to improve crop yields and food quality. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SYT stock.

Sensient Technologies Corporation (SXT) is seeing ratings go up from a C last week to a B this week. Sensient Technologies Corporation is a global manufacturer and marketer of colors, flavors and fragrances for products in the food and beverage, cosmetic and pharmaceutical, inkjet and other speciality markets. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SXT stock.

E. I. du Pont de Nemours and Company (DD) shows solid improvement this week. The company’s rating rises from a B to a A. E. I. du Pont de Nemours and Company is a global chemical and life sciences company, with businesses that include agriculture and industrial biotechnology, chemistry, biology, materials science and manufacturing. The company also gets A’s in earnings momentum and return on equity. For more information, get Portfolio Grader’s complete analysis of DD stock.

FMC Corporation’s (FMC) ratings are looking better this week, moving up to a B from last week’s C. FMC Corporation operates as a diversified research company in the chemical industry. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of FMC stock.

The rating of Orion Engineered Carbons SA (OEC) moves up this week, rising from a C to a B. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of OEC stock.

This is a strong week for Braskem S.A. Sponsored ADR Pfd Class A (BAK). The company’s rating climbs to A from the previous week’s B. Braskem S.A. Sponsored ADR Pfd Class A produces and sells basic petrochemicals and thermoplastic resins in Brazil and internationally. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of BAK stock.

Rayonier Advanced Materials Inc (RYAM) gets a higher grade this week, advancing from a B last week to a A. The company also gets A’s in operating margin growth, earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of RYAM stock.

Advanced Emissions Solutions, Inc. (ADES) improves from a C to a B rating this week. Advanced Emissions Solutions, Inc. is an environmental technology/specialty company that supplies powdered activated carbon, injection systems, and related services. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of ADES stock.

Gulf Resources, Inc. (GURE) boosts its rating from a C to a B this week. Gulf Resources, Inc. manufactures chemical products for use in oil and gas field explorations, oil and gas distribution, oil field drilling, wastewater processing, papermaking chemical agents, and inorganic chemical. The company also gets A’s in operating margin growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of GURE 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.