The grades of three Commercial Services stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

G&K Services (NASDAQ:GKSR) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. G&K Services leases and maintains uniforms and other textile products. In Portfolio Grader’s specific subcategory of Earnings Growth, GKSR also gets an A. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of GKSR stock.

This week, Ceco Environmental (NASDAQ:CECE) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). CECO Environmental provides air-pollution control technology products and services worldwide. The stock price has risen 22% over the past month, better than the 3.6% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of CECE stock.

TRC (NYSE:TRR) gets a higher grade this week, advancing from a C last week to a B. TRC provides engineering, consulting, and construction management services. Investors have pushed the stock price up 8.9% over the past month. For more information, get Portfolio Grader’s complete analysis of TRR 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.