The overall ratings of 8 Oil Gas & Consumable Fuels stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Slipping from a D to a F rating, Pioneer Natural Resources Company (PXD) takes a hit this week. Pioneer Natural Resources Company explores for, develops, and produces oil and gas reserves. The company also gets F’s in sales growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PXD stock.

Magellan Midstream Partners, L.P. (MMP) slips from a C to a D this week. Magellan Midstream Partners, L.P. is primarily involved in the storage, transportation, and distribution of refined petroleum products and ammonia. For more information, get Portfolio Grader’s complete analysis of MMP stock.

This week, Enbridge Energy Partners, L.P. Class A (EEP) drops from a D to a F rating. Enbridge Energy Partners, L.P. Class A transports crude oil and natural gas liquids to refineries in the midwestern United States and eastern Canada. The company also gets F’s in sales growth, earnings growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of EEP stock.

Delek US Holdings, Inc. (DK) is having a tough week. The company’s rating falls from a C to a D. Delek US Holdings, Inc. is an integrated energy company that engages in refining, marketing, supplying, and retailing petroleum products. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DK stock.

Vanguard Natural Resources, LLC (VNR) earns a F this week, moving down from last week’s grade of D. Vanguard Natural Resources, LLC is an independent natural gas and oil company. The company also gets F’s in sales growth, operating margin growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of VNR stock.

This week, Pacific Ethanol Inc’s (PEIX) rating worsens to a F from the company’s D rating a week ago. Pacific Ethanol Inc produces and markets low-carbon ethanol. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PEIX stock.

Yanzhou Coal Mining Co. Ltd. Sponsored ADR Class H’s (YZC) rating weakens this week, dropping to a F versus last week’s D. Yanzhou Coal Mining Co. Ltd. Sponsored ADR Class H engages in the mining, preparation, and sale of coal. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of YZC stock.

FX Energy, Inc. (FXEN) gets weaker ratings this week as last week’s D drops to a F. FX Energy, Inc. explores for and produces oil and gas, primarily in the Republic of Poland. The company also gets F’s in sales growth, operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FXEN 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.