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”).

Twitter, Inc.’s (TWTR) rating weakens this week, dropping to a F versus last week’s D. For more information, get Portfolio Grader’s complete analysis of TWTR stock.

Slipping from a C to a D rating, DHI Group, Inc. (DHX) takes a hit this week. DHI Group, Inc. provides specialized career Websites and career fairs for professional communities. The company also gets F’s in sales growth, operating margin growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of DHX stock.

Great Elm Capital Group, Inc. (GEC) gets weaker ratings this week as last week’s D drops to a F. The company also gets F’s in sales growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GEC stock.

This week, eGain Corporation (EGAN) drops from a C to a D rating. EGain Corporation provides customer service infrastructure solutions for companies involved in electronic commerce. For more information, get Portfolio Grader’s complete analysis of EGAN stock.

Renren Inc. Sponsored ADR Class A (RENN) experiences a ratings drop this week, going from last week’s D to a F. Renren Inc. Sponsored ADR Class A operates a real-time social networking website. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of RENN 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.