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

This week, Rollins Inc. (NYSE:ROL) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Rollins provides pest and termite control services to residential and commercial customers internationally. The stock’s trailing PE Ratio is 29.30. To get an in-depth look at ROL, get Portfolio Grader’s complete analysis of ROL stock.

This week, Multi-Color Corp.’s (NASDAQ:LABL) rating worsens to a D from the company’s C rating a week ago. Multi-Color produces printed labels for branded consumer products. The stock also gets an F in Earnings Surprise. For more information, get Portfolio Grader’s complete analysis of LABL stock.

Fuel Tech (NASDAQ:FTEK) earns a D this week, falling from last week’s grade of C. Fuel Tech develops and commercializes air pollution control technologies and provides engineering services. The stock also gets an F in Earnings Revisions. For a full analysis of FTEK stock, visit Portfolio Grader.

This is a rough week for Ritchie Bros. Auctioneers (NYSE:RBA). The company’s rating falls to D from the previous week’s C. Ritchie Bros. Auctioneers operates as an industrial auctioneer that sells through unreserved public auctions. The stock also rates an F in Earnings Surprise. The trailing PE Ratio for the stock is 27.30. For more information, get Portfolio Grader’s complete analysis of RBA 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.