This week, these five stocks have the worst ratings in Surprise, one of the eight Fundamental Categories on Portfolio Grader.

Lawson Products, Inc. (LAWS) sells and distributes expendable maintenance, repair, and replacement products to OEM’s. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of LAWS stock.

Core Laboratories NV (CLB) serves the oil and gas industry by providing it with proprietary and patented reservoir description, production enhancement, and reservoir management services. The company also gets F’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of CLB stock.

Medtronic Plc (MDT) develops therapeutic and diagnostic medical products. For more information, get Portfolio Grader’s complete analysis of MDT stock.

EMC Insurance Group Inc. (EMCI) focuses on the sale of commercial lines of property and casualty insurance to small and medium-sized businesses, institutions, and individual customers through independent insurance agents. For more information, get Portfolio Grader’s complete analysis of EMCI stock.

Post Properties, Inc. (PPS) develops and operates upscale multi-family apartment communities in the Southeastern and Southwestern United States. For more information, get Portfolio Grader’s complete analysis of PPS 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.