This week, the overall grades of three Construction and Engineering stocks are lower, according to the Portfolio Grader database. 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. For more information, get Portfolio Grader’s complete analysis of FLR stock.

This week, Foster Wheeler (NASDAQ:FWLT) drops from a C to a D rating. 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 the past five days, the stock price has pushed higher, arriving at $21.60. Shares of the stock have been exchanging at an usually rapid pace, twice the rate of the week prior.

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

This week, Sterling Construction’s (NASDAQ:STRL) rating worsens to a D from the company’s C rating a week ago. Sterling Instruction Company is a heavy civil construction company that specializes in the building, reconstruction and repair of transportation and water infrastructure. The stock’s trailing PE Ratio is 741.40. 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.