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 (RDWR) earns an F (“strong sell”) this week, moving down from last week’s grade of 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. Shares of the stock are changing hands at twice the rate they were a week ago. The trailing PE Ratio for the stock is 48.30. For more information, get Portfolio Grader’s complete analysis of RDWR stock.

This week, EchoStar Corporation Class A (SATS) falls to a D (“sell”), worse than last week’s grade of C (“hold”). 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. Shares of the stock have been exchanging at an usually rapid pace, twice the rate of the week prior. The stock has a trailing PE Ratio of 76.70. To get an in-depth look at SATS, get Portfolio Grader’s complete analysis of SATS stock.

Dragonwave Inc. (DRWI) earns a D this week, moving down from last week’s grade of 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. Trade volume is up 429.4% from the previous week. 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.