The overall ratings of three Construction and Engineering stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Fluor Corporation (NYSE: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. In Portfolio Grader’s specific subcategory of Earnings Growth, FLR also gets an F. For more information, get Portfolio Grader’s complete analysis of FLR stock.

This week, Foster Wheeler’s (NASDAQ:FWLT) rating worsens to a D from the company’s C rating a week ago. Foster Wheeler AG provides design, engineering, construction, manufacturing, project development and management, research, plant operations, and environmental services. The stock also gets an F in Sales Growth. For a full analysis of FWLT stock, visit Portfolio Grader.

Sterling Construction Company, Inc. (NASDAQ:STRL) is having a tough week. The company’s rating falls from a 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. The stock price has dropped 7% over the past month, worse than the 1.3% decrease the Nasdaq has seen over the same period of time. 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.