The grades of six 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”).

Knology (KNOL) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. 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 making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating 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.

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.

Interpublic Group of Companies, Inc. (IPG) boosts its rating from a C to a B this week. Interpublic Group is an organization of advertising agencies and marketing service companies. For more information, get Portfolio Grader’s complete analysis of IPG stock.

This week, IMAX Corporation’s (IMAX) ratings are up from a C last week to a B. IMAX designs and manufactures digital imaging and sound technologies for IMAX and IMAX 3D formats. For more information, get Portfolio Grader’s complete analysis of IMAX 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.