The ratings of 4 Software stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

CA, Inc. (CA) is having a tough week. The company’s rating falls from a C to a D. CA, Inc. develops and delivers software and services to organizations. For more information, get Portfolio Grader’s complete analysis of CA stock.

This week, TubeMogul, Inc. (TUBE) drops from a C to a D rating. The company also gets F’s in earnings surprise and return on equity. For more information, get Portfolio Grader’s complete analysis of TUBE stock.

Aware, Inc. (AWRE) slips from a D to a F this week. Aware, Inc. supplies various products for the biometrics and digital subscriber line (DSL) service assurance industries primarily in the United States and Germany. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of AWRE stock.

Digital Turbine, Inc. (APPS) gets weaker ratings this week as last week’s D drops 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 APPS 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.