Seven media stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded 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) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. 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.

This week, Outdoor Channel Holdings’ (OUTD) ratings are up from a C last week to a B. 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. (DGIT) boosts its rating from a C to a B this week. 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.

Cinemark Holdings, Inc. (CNK) gets a higher grade this week, advancing from a B last week to an A. Cinemark is engaged in the motion picture exhibition industry, and own theatres internationally. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of 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. Shares of the stock have been trading at an exceptionally rapid pace, up 426.4% from the week prior. For more information, get Portfolio Grader’s complete analysis of HKTV stock.

This is a strong week for John Wiley & Sons, Inc. Class A (JW.A). The company’s rating climbs to B from the previous week’s C. 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.