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”).

Fluor Corporation’s (NYSE:FLR) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. 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. The trailing PE Ratio for the stock is 35.70. For a full analysis of FLR stock, visit Portfolio Grader.

The rating of Foster Wheeler (NASDAQ:FWLT) declines this week from a 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 rates an F in Sales Growth. The stock has a trailing PE Ratio of 29.30. For more information, get Portfolio Grader’s complete analysis of FWLT stock.

The rating of Sterling Construction Company, Inc. (NASDAQ:STRL) slips 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 rates an F in Earnings Growth, Earnings Revisions, and Earnings Surprise. Equity, Cash Flow, and Margin Growth also get F’s. The stock price has dropped 8.4% 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.