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

This week, Unwired Planet (NASDAQ:UPIP) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Unwired Planet provides open Internet-based communication infrastructure software and applications. In Portfolio Grader’s specific subcategories of Earnings Revisions, Equity, and Sales Growth, UPIP also gets an F. The stock price has fallen 12.3% over the past month, worse than the 7.8% decrease the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of UPIP stock.

Bankrate (NYSE:RATE) ratings are on the decline this week as the company earns a F (“strong sell”). Last week, it received a D (“sell”). Bankrate owns and operates an Internet-based consumer banking and personal finance network. The stock gets F’s in Earnings Revisions and Earnings Surprise. Over the past month, shares of the company are down 2.3%. For a full analysis of RATE stock, visit Portfolio Grader.

The rating of Limelight Network (NASDAQ:LLNW) slips from a D to a F. Limelight Networks is a content delivery network for internet distribution of video, music, games and downloads. The stock gets F’s in Equity and Cash Flow. Share prices fell 14.2% over the past month. To get an in-depth look at LLNW, get Portfolio Grader’s complete analysis of LLNW 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.