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’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. For Portfolio Grader’s specific subcategory of Earnings Growth, FLR also gets an F. For a full analysis of FLR stock, visit Portfolio Grader.

This is a rough week for Foster Wheeler (NASDAQ:FWLT). The company’s rating falls to D from the previous week’s C. 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. The stock price has fallen 5.7% over the past month, worse than the 3% increase the Nasdaq has seen over the same period of time.

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

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 rates an F in Earnings Growth, Earnings Revisions, and Earnings Surprise. Equity, Cash Flow, and Margin Growth also get F’s. 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.