For the current week, the overall ratings of three communications equipment stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Radware’s (RDWR) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). Radware develops, manufactures and markets application delivery and network security solutions that provide end-to-end availability, performance and security of mission critical networked applications. In Portfolio Grader’s specific subcategory of Earnings Growth, RDWR also gets an F. The stock’s trailing PE Ratio is 44.30. To get an in-depth look at RDWR, get Portfolio Grader’s complete analysis of RDWR stock.

EchoStar Corporation Class A’s (SATS) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. EchoStar engages in the design, development, and distribution of digital set-top boxes and related products. The stock gets F’s in Earnings Growth, Earnings Momentum and Margin Growth. The stock currently has a trailing PE Ratio of 40.40. For more information, get Portfolio Grader’s complete analysis of SATS stock.

Dragonwave Inc.’s (DRWI) rating weakens this week, dropping to a D versus last week’s C. DragonWave is a producer of high-capacity packet microwave solutions which support networking and other data transmission needs. The stock gets F’s in Equity and Cash Flow. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. To get an in-depth look at DRWI, get Portfolio Grader’s complete analysis of DRWI 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.