Three tech services stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Gartner, Inc.’s (IT) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). Gartner provides research and analysis on the computer hardware, software, communications, and related information technology industries. In Portfolio Grader’s specific subcategory of Equity, IT also gets an A. For more information, get Portfolio Grader’s complete analysis of IT stock.

Western Union Company (WU) gets a higher grade this week, advancing from a C last week to a B. Western Union is engaged in global money transfer and payment services. Shares of the stock have been changing hands at an unusually rapid pace, three times the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of WU stock.

The rating of Convergys Corporation (CVG) moves up this week, rising from a C to a B. Convergys provides customer management business process outsourcing solutions for communications, financial services, technology, and other vertical markets in North America and internationally. For more information, get Portfolio Grader’s complete analysis of CVG 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.