This week, these five stocks have the best ratings in Operating Margin, one of the eight Fundamental Categories on Portfolio Grader.

Post Properties, Inc. (PPS) develops and operates upscale multi-family apartment communities in the Southeastern and Southwestern United States. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of PPS stock.

VASCO Data Security International, Inc. (VDSI) designs, develops, markets and supports open standards-based hardware and software security systems that manage and secure access to information assets. The company also gets A’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of VDSI stock.

Phillips 66 (PSX) operates as an independent downstream energy company. The company also gets A’s in operating margin growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of PSX stock.

AAC Holdings, Inc. (AAC) is a blank check company organized under the laws of the Cayman Islands as an exempted company with limited liability. The company also gets A’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of AAC stock.

Highway Holdings Limited (HIHO) manufactures metal, plastic, electric and electronic components, subassemblies, and finished products for major contract manufacturers. The company also gets A’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of HIHO 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.