Three Software 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”).

Ebix Inc. (NASDAQ:EBIX) is showing solid improvement this week. The company’s rating rises from a C (“hold”) to a B (“buy”). Ebix provides a series of application software products for the insurance industry, including carrier systems and agency systems. In Portfolio Grader’s specific subcategories of Equity and Cash Flow, EBIX also gets A’s. The stock is up 20.2% since last month, outpacing the Nasdaq’s 1.6% growth during the same time. For more information, get Portfolio Grader’s complete analysis of EBIX stock.

VirnetX Holding (AMEX:VHC) earns a B this week, jumping up from last week’s grade of C. Vanguard Health Systems owns and operates acute care and specialty hospitals, outpatient facilities, and related businesses in urban and suburban markets in the United States. For more information, get Portfolio Grader’s complete analysis of VHC stock.

KongZhong (NASDAQ:KONG) is boosting its rating from a B (“buy”) to an A (“strong buy”) this week. KongZhong delivers wireless value-added services to consumers in China through multiple technology platforms. For more information, get Portfolio Grader’s complete analysis of KONG 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.