The grades of 4 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 is a strong week for Liberty Broadband Corp. Class C (LBRDK). The company’s rating climbs to B from the previous week’s C. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of LBRDK stock.

This week, Liberty Broadband Corp. Class A (LBRDA) pushes up from a C to a B rating. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of LBRDA stock.

Carmike Cinemas, Inc. (CKEC) improves from a D to a B rating this week. Carmike Cinemas, Inc. is a motion picture exhibitor in the United States. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of CKEC stock.

Sirius XM Holdings, Inc. (SIRI) earns a B this week, jumping up from last week’s grade of C. Sirius XM Holdings, Inc. broadcasts various channels of audio from its satellites. For more information, get Portfolio Grader’s complete analysis of SIRI 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.