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”).

Fluor (NYSE:FLR) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. Fluor Corporation provides professional services in the fields of engineering, procurement, construction and maintenance as well as project management services on a global basis. FLR also rates an F in Portfolio Grader’s specific subcategory of Earnings Growth. To get an in-depth look at FLR, get Portfolio Grader’s complete analysis of FLR stock.

The rating of Foster Wheeler (NASDAQ:FWLT) slips from C to a D. 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.

The rating of Sterling Construction (NASDAQ:STRL) declines this week from 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 fallen 7% over the past month, worse than the Nasdaq, which has held flat over the same period of time. For more information, 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.