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

Emerald Oil, Inc. (EOX) is an independent exploration and production oil company focused on developing oil wells. The company also gets F’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of EOX stock.

DryShips Inc. (DRYS) is the owner and operator of a drybulk fleet. The company also gets F’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DRYS stock.

Legacy Reserves LP (LGCY) acquires and explores for oil and natural gas properties in the United States. The company also gets F’s in sales growth, operating margin growth, and earnings growth. For more information, get Portfolio Grader’s complete analysis of LGCY stock.

Halcon Resources Corporation (HK) an independent energy company, engages in the acquisition, production, exploration, and development of onshore oil and natural gas properties in the United States. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HK stock.

Vanguard Natural Resources, LLC (VNR) is an independent natural gas and oil company. The company also gets F’s in sales growth, operating margin growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of VNR 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.