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

Fluor Corporation (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. 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 provides design, engineering, construction, manufacturing, project development and management, research, plant operations, and environmental services. The stock also gets an F in Sales Growth. To get an in-depth look at FWLT, get Portfolio Grader’s complete analysis of FWLT stock.

Sterling Construction Company, Inc. (NASDAQ:STRL) earns a D this week, falling from last week’s grade of C. Sterling Instruction Company is a heavy civil construction company that specializes in the building, reconstruction and repair of transportation and water infrastructure. 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.