This week, these five stocks have the worst ratings in Earnings Growth, one of the eight Fundamental Categories on Portfolio Grader.

BlackBerry Limited (BBRY) engages in the design, manufacture and marketing of wireless solutions worldwide. The company also gets F’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of BBRY stock.

Giga-tronics Incorporated (GIGA) designs, manufactures, and markets a line of test and measurement equipment. The company also gets F’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of GIGA stock.

NN, Inc. (NNBR) is an independent manufacturer and supplier of precision steel balls and rollers to both domestic and international anti-friction bearing manufacturers. The company also gets F’s in operating margin growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NNBR stock.

Global Sources Ltd. (GSOL) operates as a business-to-business media company primarily in greater China. The company also gets F’s in sales growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of GSOL stock.

Finish Line, Inc. Class A (FINL) is a specialty retailer of men’s, women’s and children’s brand name athletic and leisure footwear, activewear, and accessories. The company also gets F’s in earnings growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of FINL 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.