This week, the overall grades of three commercial services stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

InnerWorkings, Inc. (INWK) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. InnerWorkings provides print procurement solutions to corporate clients in the United States. In Portfolio Grader’s specific subcategory of Margin Growth, INWK also gets an F. The trailing PE Ratio for the stock is 46.30. To get an in-depth look at INWK, get Portfolio Grader’s complete analysis of INWK stock.

Casella Waste Systems, Inc. Class A’s (CWST) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). Casella Waste Systems provides resource management expertise and services related to solid waste collection, transfer, disposal, and recycling to residential, commercial, municipal, and industrial customers. For more information, get Portfolio Grader’s complete analysis of CWST stock.

This week, Kimball International, Inc. Class B (KBAL) drops from a C to a D rating. The stock also gets an F in Earnings Revisions. To get an in-depth look at KBAL, get Portfolio Grader’s complete analysis of KBAL 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.