This week, 6 Commercial Services & Supplies stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Team, Inc. (TISI) earns a D this week, moving down from last week’s grade of C. Team, Inc. is a provider of specialty maintenance and construction services required in maintaining high temperature and high pressure piping systems and vessels that are utilized in the refining, petrochemical, power, pipeline, and other heavy industries. The company also gets F’s in operating margin growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of TISI stock.

Healthcare Services Group, Inc.’s (HCSG) rating weakens this week, dropping to a D versus last week’s C. Healthcare Services Group, Inc. provides housekeeping, laundry, linen, facility maintenance, and dietary services to the health care industry in the United States. For more information, get Portfolio Grader’s complete analysis of HCSG stock.

R.R. Donnelley & Sons Company (RRD) experiences a ratings drop this week, going from last week’s D to a F. R.R. Donnelley & Sons Company provides integrated communication solutions to private and public sectors worldwide. The company also gets F’s in earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of RRD stock.

This week, Pitney Bowes Inc. (PBI) drops from a D to a F rating. Pitney Bowes Inc. sells and finances, rents, and services integrated mail and document management systems. For more information, get Portfolio Grader’s complete analysis of PBI stock.

Slipping from a D to a F rating, Atento SA (ATTO) takes a hit this week. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ATTO stock.

This week, Fuel Tech, Inc.’s (FTEK) rating worsens to a F from the company’s D rating a week ago. Fuel Tech, Inc. develops and commercializes air pollution control technologies and provides engineering services. The company also gets F’s in sales growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FTEK 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.