This week, three Commercial Services stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Asta Funding (NASDAQ:ASFI) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. Asta Funding acquires, manages, services, and recovers on portfolios of consumer receivables. In Portfolio Grader’s specific subcategories of Cash Flow and Margin Growth, ASFI also gets A’s. For more information, get Portfolio Grader’s complete analysis of ASFI stock.

This is a strong week for Ceco Environmental (NASDAQ:CECE). The company’s rating climbs to A from the previous week’s B. CECO Environmental provides air-pollution control technology products and services worldwide. For more information, get Portfolio Grader’s complete analysis of CECE stock.

TRC (NYSE:TRR) boosts its rating from a B to a A this week. TRC provides engineering, consulting, and construction management services. Shares of TRR have increased 10.2% over the past month, better than the 0.6% increase the S&P 500 has seen over the same period of time. The stock currently has a trailing PE Ratio of 7.00. 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.