The grades of three commercial services stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Performant Financial Corporation’s (PFMT) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Revisions, Earnings Surprise, Equity, Margin Growth, and Sales Growth, PFMT also gets A’s. Shares of PFMT have increased 11.2% over the past month, better than the 1.3% decrease the Nasdaq has seen over the same period of time. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of PFMT stock.

Courier Corporation (CRRC) gets a higher grade this week, advancing from a C last week to a B. Courier engages in printing, publishing, and selling books. For more information, get Portfolio Grader’s complete analysis of CRRC stock.

United Stationers (USTR) is seeing ratings go up from a C last week to a B this week. United Stationers is a wholesale distributor of business products, including technology products, office products, office furniture, janitorial and breakroom supplies and industrial supplies. For more information, get Portfolio Grader’s complete analysis of USTR 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.