The overall ratings of 17 Oil Gas & Consumable Fuels stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, REX American Resources Corporation’s (REX) rating worsens to a D from the company’s C rating a week ago. REX American Resources Corporation engages in the production and sale of ethanol. The company also gets F’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of REX stock.

ConocoPhillips (COP) declines this week from a D to a F. ConocoPhillips is an international company involved in the exploration, production, refining, and marketing of energy. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of COP stock.

Dominion Midstream Partners LP (DM) earns a D this week, moving down from last week’s grade of C. Dominion Midstream Partners LP provides business information and professional services to the legal, financial, and real estate sectors in the United States. The company also gets F’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of DM stock.

This week, HollyFrontier Corporation (HFC) drops from a C to a D rating. HollyFrontier Corporation refines, transports, stores and markets petroleum products. The company also gets F’s in sales growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HFC stock.

Pembina Pipeline Corporation (PBA) is having a tough week. The company’s rating falls from a C to a D. Pembina Pipeline Corporation transports, stores, and markets petroleum products. The company also gets F’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of PBA stock.

Cabot Oil & Gas Corporation (COG) gets weaker ratings this week as last week’s D drops to a F. Cabot Oil & Gas Corporation is an independent company that develops, explores, produces and markets natural gas, and transports, stores, and gathers it for resale. 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 COG stock.

This is a rough week for Panhandle Oil and Gas Inc. Class A (PHX). The company’s rating falls to D from the previous week’s C. Panhandle Oil and Gas Inc. Class A explores for and develops oil and gas properties, and produces and sells oil and natural gas. 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 PHX stock.

Golar LNG Limited’s (GLNG) rating weakens this week, dropping to a F versus last week’s D. Golar LNG Limited is a shipping company which acquires, owns, operates, and charters liquefied natural gas (LNG) carriers and floating storage regasification units. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GLNG stock.

Slipping from a D to a F rating, Green Plains Inc. (GPRE) takes a hit this week. Green Plains Inc. constructs and operates dry mill, fuel-grade ethanol production facilities. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GPRE stock.

Memorial Resource Development Corp (MRD) slips from a D to a F this week. 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 MRD stock.

Dorian LPG Ltd. (LPG) experiences a ratings drop this week, going from last week’s C to a D. For more information, get Portfolio Grader’s complete analysis of LPG stock.

This week, Alon USA Energy, Inc. (ALJ) drops from a D to a F rating. Alon USA Energy, Inc. is an independent refiner and marketer of petroleum products operating mainly in the South Central, Southwestern and Western regions of the United States. 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 ALJ stock.

Ardmore Shipping Corp. (ASC) gets weaker ratings this week as last week’s C drops to a D. The company also gets F’s in earnings momentum and free cash flow. For more information, get Portfolio Grader’s complete analysis of ASC stock.

Enerplus Corporation (ERF) declines this week from a D to a F. Enerplus Corporation is an oil and gas exploration and production company that owns a large, diversified portfolio of income-generating crude oil and natural gas properties. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ERF stock.

This week, TOP Ships Inc.’s (TOPS) rating worsens to a F from the company’s D rating a week ago. TOP Ships Inc. offers marine shipping services. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of TOPS stock.

Overseas Shipholding Group Inc Class B (OSGB) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of OSGB stock.

Navios Maritime Acquisition Corporation’s (NNA) rating weakens this week, dropping to a F versus last week’s D. Navios Maritime Acquisition Corporation is an owner and operator of tanker vessels focusing in the transportation of petroleum products (clean and dirty) and bulk liquid chemicals. The company also gets F’s in earnings momentum and free cash flow. For more information, get Portfolio Grader’s complete analysis of NNA 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.