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

Taomee Holdings Ltd. Sponsored ADR (TAOM) produces children’s entertainment. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of TAOM stock.

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

DS Healthcare Group, Inc. (DSKX) develops and markets skin care, personal care, and hair care products. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of DSKX stock.

Black Diamond, Inc. (BDE) provides outdoor recreation equipment and active lifestyle products. The company also gets F’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of BDE stock.

Syneron Medical Ltd (ELOS) designs, develops, and markets aesthetic medical products based on proprietary Electro-Optical Synergy technologies. The company also gets F’s in operating margin growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of ELOS 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.