The overall ratings of three media stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Cumulus Media Inc. Class A’s (CMLS) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). Cumulus Media is a radio broadcasting corporation that owns and operates FM and AM radio station clusters that serve mid-sized markets in the United States. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum and Earnings Surprise, CMLS also gets an F. Trade volume is up 1060.8% from the previous week. The stock has a trailing PE Ratio of 41.40. For more information, get Portfolio Grader’s complete analysis of CMLS stock.

This week, World Wrestling Entertainment, Inc. Class A (WWE) falls to a D (“sell”), worse than last week’s grade of C (“hold”). World Wrestling Entertainment is engaged in the development, production and marketing of television and pay-per-view event programming and live events, and the licensing and sale of consumer products featuring its World Wrestling Entertainment brands. The stock receives F’s in Earnings Growth, Earnings Revisions, Equity and Margin Growth. To get an in-depth look at WWE, get Portfolio Grader’s complete analysis of WWE stock.

The rating of Discovery Communications, Inc. Class A (DISCA) slips from a D to an F. Discovery Communications is a global media and entertainment company that provides programming across multiple distribution platforms. As of May 4, 2015, 11.9% of outstanding Discovery Communications, Inc. Class A shares were held short. For more information, get Portfolio Grader’s complete analysis of DISCA 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.