This week, five Software stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Sky-mobi’s (NASDAQ:MOBI) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). Sky-mobi operates mobile application store in China. In Portfolio Grader’s specific subcategory of Earnings Momentum, MOBI also gets an A. For more information, get Portfolio Grader’s complete analysis of MOBI stock.

This is a strong week for AVG Technologies N.V. (NYSE:AVG). The company’s rating climbs to B from the previous week’s C. AVG Technologies engages in the development and sale of Internet security software and online service solutions under the AVG brand name. For more information, get Portfolio Grader’s complete analysis of AVG stock.

Activision Blizzard (NASDAQ:ATVI) improves from a C to a B rating this week. Activision Blizzard is an online, personal computer (PC), console, and handheld game publisher. For more information, get Portfolio Grader’s complete analysis of ATVI stock.

Ansys (NASDAQ:ANSS) boosts its rating from a C to a B this week. Ansys develops and markets engineering simulation software and technologies used by engineers and designers working in fields such as aerospace, electronics, biomedical, energy, and defense. For more information, get Portfolio Grader’s complete analysis of ANSS stock.

DesCartes Systems Group (NASDAQ:DSGX) shows solid improvement this week. The company’s rating rises from a C to a B. Descartes Systems Group is a global provider of federated network and global logistics technology solutions that help its customers make and receive shipments and manage related resources. For more information, get Portfolio Grader’s complete analysis of DSGX 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.