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

Newpark Resources, Inc. (NR) provides environmental services to the oil and gas exploration and production industry, primarily in the Gulf Coast market. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NR stock.

Broadwind Energy, Inc. (BWEN) manufactures, installs and maintains components for energy and infrastructure-related industries with a focus on the wind energy sector. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of BWEN stock.

Intrepid Potash, Inc. (IPI) mines and markets potash for use as a fertilizer. The company also gets F’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of IPI 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, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of ELOS stock.

Liberty TripAdvisor Holdings Inc Class A. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of LTRPA 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.