The ratings of 3 Diversified Consumer Services stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

ServiceMaster Global Holdings, Inc. (SERV) gets weaker ratings this week as last week’s C drops to a D. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SERV stock.

Liberty Tax, Inc. Class A (TAX) earns a F this week, moving down from last week’s grade of D. Liberty Tax, Inc. Class A provides federal and state tax preparation services and related financial products through retail offices and online in the United States and Canada. The company also gets F’s in sales growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of TAX stock.

Cambium Learning Group, Inc. (ABCD) is having a tough week. The company’s rating falls from a C to a D. Cambium Learning Group, Inc. provides intervention curricula, educational technologies, professional services, and other research-based education solutions in the United States. For more information, get Portfolio Grader’s complete analysis of ABCD 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.