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

This week, Fluor (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. For Portfolio Grader’s specific subcategory of Earnings Growth, FLR also gets an F. The stock price has fallen 16.7% over the past month, worse than the 1% increase the S&P 500 has seen over the same period of time. For a full analysis of FLR stock, visit Portfolio Grader.

Foster Wheeler (NASDAQ:FWLT) earns a D this week, falling from last week’s grade of C. Foster Wheeler AG provides design, engineering, construction, manufacturing, project development and management, research, plant operations, and environmental services. The stock also rates an F in Sales Growth.

To get an in-depth look at FWLT, get Portfolio Grader’s complete analysis of FWLT stock.

This week, Sterling Construction (NASDAQ:STRL) drops from a C to a D rating. Sterling Instruction Company is a heavy civil construction company that specializes in the building, reconstruction and repair of transportation and water infrastructure. For a full analysis of STRL stock, visit Portfolio Grader.

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.