This week, the ratings of 5 Software stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Qualys, Inc. (QLYS) slips from a D to a F this week. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of QLYS stock.

Slipping from a C to a D rating, Changyou.com Ltd. Sponsored ADR Class A (CYOU) takes a hit this week. Changyou.com Ltd. Sponsored ADR Class A develops and operates online games in China. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CYOU stock.

This is a rough week for Barracuda Networks, Inc. (CUDA). The company’s rating falls to F from the previous week’s D. The company also gets F’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of CUDA stock.

Evolving Systems, Inc. (EVOL) experiences a ratings drop this week, going from last week’s D to a F. Evolving Systems, Inc. is a software company providing business and operational support services and solutions to the telecommunications industry. For more information, get Portfolio Grader’s complete analysis of EVOL stock.

TeleNav, Inc.’s (TNAV) rating weakens this week, dropping to a F versus last week’s D. TeleNav, Inc. provides personalized mobile navigation service in the United States and internationally. The company also gets F’s in earnings surprise and return on equity. For more information, get Portfolio Grader’s complete analysis of TNAV 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.