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

Midstates Petroleum Company, Inc. (MPO) is an independent exploration and production company. The company also gets F’s in sales growth, earnings growth, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of MPO stock.

Centrus Energy Corp. Class A. 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 LEU stock.

Chesapeake Energy Corporation (CHK) explores, develops and acquires properties for the production of natural gas and crude oil from underground reservoirs. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CHK stock.

Altisource Asset Management Corp.. The company also gets F’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of AAMC stock.

Natural Resource Partners L.P. (NRP) owns and manages coal properties in Appalachia, the Illinois Basin, and the Western United States. 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 NRP 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.