This week, these five stocks have the best ratings in Surprise, one of the eight Fundamental Categories on Portfolio Grader.

JMP Group LLC (JMP) offers investment banking and asset management services. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of JMP stock.

Mentor Graphics Corporation (MENT) manufactures, markets, and supports software and hardware electronic design automation products. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of MENT stock.

VimpelCom Ltd. Sponsored ADR (VIP) provides an integrated telecommunications service through a range of wireless, fixed, and broadband technologies throughout the world. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of VIP stock.

SBA Communications Corporation (SBAC) owns and operates wireless communications infrastructure in the United States. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of SBAC stock.

iRobot Corporation (IRBT) engages in designing, developing, and marketing robots for the consumer, government, and industrial markets worldwide. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of IRBT 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.