For the current week, the overall ratings of three construction and engineering stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Fluor Corporation (FLR) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Fluor Corporation provides professional services in the fields of engineering, procurement, construction and maintenance as well as project management services on a global basis. For Portfolio Grader’s specific subcategory of Earnings Growth, FLR also gets an F. The stock has a trailing PE Ratio of 25.10. For more information, get Portfolio Grader’s complete analysis of FLR stock.

Foster Wheeler’s (FWLT) rating weakens this week, dropping to a D versus last week’s C. Foster Wheeler provides design, engineering, construction, manufacturing, project development and management, research, plant operations, and environmental services. The stock also rates an F in Sales Growth. For a full analysis of FWLT stock, visit Portfolio Grader.

Sterling Construction Company, Inc. (STRL) experiences a ratings drop this week, going from last week’s C to a D. Sterling Instruction Company is a heavy civil construction company that specializes in the building, reconstruction and repair of transportation and water infrastructure. To get an in-depth look at STRL, get Portfolio Grader’s complete analysis of STRL 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.