This week, the overall grades of 5 Internet Software & Services stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Pandora Media, Inc. (P) is having a tough week. The company’s rating falls from a C to a D. Pandora Media, Inc. offers radio stations available to stream on computers and mobile phones. The company also gets F’s in earnings growth, earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of P stock.

YuMe, Inc.’s (YUME) rating weakens this week, dropping to a D versus last week’s C. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of YUME stock.

Slipping from a C to a D rating, Gigamedia Limited (GIGM) takes a hit this week. Gigamedia Limited provides online entertainment software and services to the online gaming industry, particularly the online poker and casino industry. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GIGM stock.

Spark Networks, Inc. (LOV) slips from a D to a F this week. Spark Networks, Inc. is a provider of online personals services in the United States and internationally. The company also gets F’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of LOV stock.

Determine, Inc. (DTRM) declines this week from a D to a F. The company also gets F’s in earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DTRM 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.