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”).

iGATE Computer Systems Ltd ADR (NYSE:PTI) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Patni Computer Systems develops software and provides information technology services and business solutions. In Portfolio Grader’s specific subcategory of Cash Flow, PTI also gets an A. For more information, get Portfolio Grader’s complete analysis of PTI stock.

Acxiom‘s (NASDAQ:ACXM) ratings are looking better this week, moving up to a A from last week’s B. Acxiom is a provider of marketing technology and services that allow marketers to manage audiences, personalize consumer experiences, and create profitable customer relationships. For more information, get Portfolio Grader’s complete analysis of ACXM stock.

This is a strong week for Gartner (NYSE:IT). The company’s rating climbs to A from the previous week’s B. Gartner provides research and analysis on the computer hardware, software, communications, and related information technology industries. For more information, get Portfolio Grader’s complete analysis of IT 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.