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. RDWR also rates an F in Portfolio Grader’s specific subcategory of Earnings Growth. The stock’s trailing PE Ratio is 46.60. For more information, get Portfolio Grader’s complete analysis of RDWR stock.

EchoStar Corporation Class A (SATS) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. 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 has a trailing PE Ratio of 77.10. To get an in-depth look at SATS, get Portfolio Grader’s complete analysis of SATS stock.

This week, Dragonwave Inc.’s (DRWI) rating worsens to a D from the company’s C rating a week ago. 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. For more information, 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.