This week, four 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”).

This week, Portfolio Recovery Associates (NASDAQ:PRAA) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Portfolio Recovery Associates provides outsourced receivables management. In Portfolio Grader’s specific subcategories of Earnings Revisions and Sales Growth, PRAA also gets A’s. Shares of the company have increased 3.6% from a month ago. This is better than the Nasdaq’s 1.6% increase for the same period. For more information, get Portfolio Grader’s complete analysis of PRAA stock.

KAR Auction Services‘s (NYSE:KAR) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). KAR Auction Services provides wholesale vehicle auction services in North America. The stock price has risen 16.2% over the past month. For more information, get Portfolio Grader’s complete analysis of KAR stock.

This week, Copart (NASDAQ:CPRT) pushes up from a B to an A rating. Copart provides online auctions and vehicle remarketing services in the United States, Canada, and the United Kingdom. The price of CPRT has increased 5.3% since last month. For more information, get Portfolio Grader’s complete analysis of CPRT stock.

This is a strong week for Steelcase (NYSE:SCS). The company’s rating climbs to B from the previous week’s C. Steelcase designs, markets and manufactures office furniture. For more information, get Portfolio Grader’s complete analysis of SCS 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.