The ratings of 5 Software stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

CyberArk Software Ltd. (CYBR) slips from a C to a D this week. For more information, get Portfolio Grader’s complete analysis of CYBR stock.

Fortinet, Inc. (FTNT) is having a tough week. The company’s rating falls from a C to a D. Fortinet, Inc. provides network security solutions. The company also gets F’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of FTNT stock.

Slipping from a C to a D rating, Qlik Technologies Inc. (QLIK) takes a hit this week. Qlik Technologies Inc. develops business intelligence solutions. The company also gets F’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of QLIK stock.

This week, Symantec Corporation (SYMC) drops from a C to a D rating. Symantec Corporation provides information security, storage, and systems management solutions to businesses and consumers. For more information, get Portfolio Grader’s complete analysis of SYMC stock.

Attunity Ltd’s (ATTU) rating weakens this week, dropping to a D versus last week’s C. Attunity Ltd provides information availability software solutions for real-time data integration, application release automation, and managed file transfer. 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 ATTU 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.