This week, the ratings of three Media stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Acquity Group Ltd. ADS (AMEX:AQ) falls to a D (“sell”), worse than last week’s grade of C (“hold”). In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum, Earnings Revisions, Earnings Surprise, and Margin Growth, AQ also gets F’s. The stock currently has a trailing PE Ratio of 44.70. To get an in-depth look at AQ, get Portfolio Grader’s complete analysis of AQ stock.

CTC Media (NASDAQ:CTCM) is having a tough week. The company’s rating falls from a C to a D. CTC Media is an independent media company that operates three Russian television networks. The stock gets F’s in Earnings Growth, Earnings Momentum, Earnings Surprise, and Margin Growth. For a full analysis of CTCM stock, visit Portfolio Grader.

Digital Generation (NASDAQ:DGIT) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). DG FastChannel provides digital technology services that allow the electronic delivery of advertisements, syndicated programs, and video news releases to traditional broadcasters, online publishers and other media outlets. The stock receives F’s in Earnings Momentum, Earnings Revisions, and Equity. Cash Flow and Margin Growth also get F’s. As of May 20, 2013, 29.8% of outstanding Digital Generation shares were held short. For more information, get Portfolio Grader’s complete analysis of DGIT 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.