The grades of seven media stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Knology (KNOL) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Knology is a fully integrated provider of video, voice and advanced communications services to residential customers in the southeastern United States. In Portfolio Grader’s specific subcategories of Equity and Margin Growth, KNOL also gets A’s. For more information, get Portfolio Grader’s complete analysis of KNOL stock.

Dex One (DEXO) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Dex One is a marketing solutions company that offers various solutions to promote businesses on the Internet through its proprietary search engine marketing product, DexNet. For more information, get Portfolio Grader’s complete analysis of DEXO stock.

Outdoor Channel Holdings (OUTD) earns a B this week, jumping up from last week’s grade of C. Outdoor Channel Holdings is the principal owner of The Outdoor Channel, a national television network. For more information, get Portfolio Grader’s complete analysis of OUTD stock.

Digital Generation, Inc.’s (DGIT) ratings are looking better this week, moving up to a B from last week’s C. Digital Generation operates a nationwide network that links advertisers and advertising agencies with radio stations and television stations across the United States and Canada. For more information, get Portfolio Grader’s complete analysis of DGIT stock.

This is a strong week for Cinemark Holdings, Inc. (CNK). The company’s rating climbs to A from the previous week’s B. Cinemark is engaged in the motion picture exhibition industry, and own theatres internationally. Shares of the stock have been trading at an exceptionally rapid pace, up fourfold from the week prior. For more information, get Portfolio Grader’s complete analysis of CNK stock.

This week, Hong Kong Television Network Ltd. Sponsored ADR (HKTV) pushes up from a C to a B rating. Hong Kong Television Network engages in the provision of multimedia production and contents distribution business, and other multimedia related activities in Hong Kong. For more information, get Portfolio Grader’s complete analysis of HKTV stock.

John Wiley & Sons, Inc. Class A (JW.A) improves from a C to a B rating this week. John Wiley & Sons publishes print and electronic products. For more information, get Portfolio Grader’s complete analysis of JW.A 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.