The overall ratings of 3 Commercial Services & Supplies stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Pointer Telocation Ltd. (PNTR) experiences a ratings drop this week, going from last week’s C to a D. Pointer Telocation Ltd. provides mobile resource management products and services for the automotive and insurance industries. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of PNTR stock.

Perma-Fix Environmental Services, Inc. (PESI) slips from a C to a D this week. Perma-Fix Environmental Services, Inc. provides industrial and nuclear-waste management services, and Consulting Engineering Services. The company also gets F’s in earnings surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PESI stock.

This is a rough week for Cenveo, Inc. (CVO). The company’s rating falls to D from the previous week’s C. Cenveo, Inc. provides print and related resources, offering world-class solutions in the areas of envelopes, custom labels, specialty packaging, commercial print, publisher solutions and business documents. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of CVO 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.