The overall ratings of 50 Oil Gas & Consumable Fuels stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Pioneer Natural Resources Company (PXD) gets weaker ratings this week as last week’s C drops to a D. Pioneer Natural Resources Company explores for, develops, and produces oil and gas reserves. 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 PXD stock.

This week, Cimarex Energy Co. (XEC) drops from a C to a D rating. Cimarex Energy Co. explores for and produces crude oil and natural gas in the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of XEC stock.

REX American Resources Corporation (REX) earns a D this week, moving down from last week’s grade of C. REX American Resources Corporation engages in the production and sale of ethanol. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of REX stock.

Hess Corporation (HES) slips from a D to a F this week. Hess Corporation discovers, develops, manufactures, and markets companion animal health products, primarily for dogs, cats, and horses. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HES stock.

ConocoPhillips (COP) experiences a ratings drop this week, going from last week’s 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 revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of COP stock.

This is a rough week for Total SA Sponsored ADR Class B (TOT). The company’s rating falls to D from the previous week’s C. Total SA Sponsored ADR Class B is an international oil and gas company engaged in all aspects of the petroleum industry. The company also gets F’s in sales growth and operating margin growth. For more information, get Portfolio Grader’s complete analysis of TOT stock.

Energen Corporation (EGN) declines this week from a D to a F. Energen Corporation engages in the development, acquisition, exploration, and production of oil, natural gas, and natural gas liquids in the continental United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of EGN stock.

Slipping from a D to a F rating, Apache Corporation (APA) takes a hit this week. Apache Corporation is an energy company that discovers, develops and produces natural gas, crude oil and natural gas liquids. The company also gets F’s in sales growth, operating margin growth, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of APA stock.

Cheniere Energy, Inc.’s (LNG) rating weakens this week, dropping to a F versus last week’s D. Cheniere Energy, Inc. engages in the ownership and operation of liquefied natural gas (LNG) receiving terminals and natural gas pipelines in the Gulf Coast of the United States. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of LNG stock.

This week, NuStar Energy L.P.’s (NS) rating worsens to a F from the company’s D rating a week ago. NuStar Energy L.P. transports and stores crude oil and refined products. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NS stock.

Adams Resources & Energy, Inc. (AE) is having a tough week. The company’s rating falls from a C to a D. Adams Resources & Energy, Inc. engages in marketing crude oil, natural gas, and petroleum products. 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 AE stock.

Slipping from a C to a D rating, Genesis Energy, L.P. (GEL) takes a hit this week. Genesis Energy, L.P. is involved in the oil and gas industry in the Gulf Coast region of the United States. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of GEL stock.

Clayton Williams Energy, Inc. (CWEI) earns a D this week, moving down from last week’s grade of C. Clayton Williams Energy, Inc. is an independent oil and gas company engaged in the exploration for and production of oil and natural gas mainly in Texas, Louisiana and New Mexico. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CWEI stock.

This is a rough week for Noble Energy, Inc. (NBL). The company’s rating falls to F from the previous week’s D. Noble Energy, Inc. is an independent company engaged in the acquisition, exploration, development, production and marketing of crude oil, natural gas, and natural gas liquids. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NBL stock.

This week, Carrizo Oil & Gas, Inc. (CRZO) drops from a C to a D rating. Carrizo Oil & Gas, Inc. is engaged in the exploration, development, production and transportation of natural gas and oil, mainly in the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CRZO stock.

Vermilion Energy Inc. (VET) slips from a D to a F this week. Vermilion Energy Inc. exploits, acquires, develops, and produces oil and natural gas in Australia, Canada, France, Ireland, and the Netherlands. 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 VET stock.

Continental Resources, Inc.’s (CLR) rating weakens this week, dropping to a F versus last week’s D. Continental Resources, Inc. explores for, develops, and produces oil and natural gas properties in the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CLR stock.

Spectra Energy Corp (SE) gets weaker ratings this week as last week’s D drops to a F. Spectra Energy Corp owns and operates a portfolio of natural gas-related energy assets. For more information, get Portfolio Grader’s complete analysis of SE stock.

DCP Midstream Partners, LP (DPM) declines this week from a D to a F. DCP Midstream Partners, LP engages in gathering, compressing, treating, processing, transporting, storing, and selling natural gas in the United States. The company also gets F’s in sales growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DPM stock.

NuStar GP Holdings, LLC (NSH) experiences a ratings drop this week, going from last week’s D to a F. NuStar GP Holdings, LLC operates oil pipelines, terminals, and storage facilities. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of NSH stock.

Ultrapar Participacoes S.A. Sponsored ADR (UGP) is having a tough week. The company’s rating falls from a C to a D. Ultrapar Participacoes S.A. Sponsored ADR is engaged in the fuel distribution and chemical businesses in Brazil. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of UGP stock.

This week, Viper Energy Partners LP’s (VNOM) rating worsens to a D from the company’s C rating a week ago. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of VNOM stock.

Slipping from a C to a D rating, Panhandle Oil and Gas Inc. Class A (PHX) takes a hit this week. 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, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PHX stock.

This is a rough week for Hoegh LNG Partners LP (HMLP). The company’s rating falls to D from the previous week’s C. The company also gets F’s in sales growth, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HMLP stock.

Statoil ASA Sponsored ADR (STO) gets weaker ratings this week as last week’s C drops to a D. Statoil ASA Sponsored ADR is involved in the development, production, transportation and marketing of crude oil, natural gas and extract natural gas liquids. The company also gets F’s in sales growth, operating margin growth, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of STO stock.

World Point Terminals LP (WPT) experiences a ratings drop this week, going from last week’s D to a F. For more information, get Portfolio Grader’s complete analysis of WPT stock.

KNOT Offshore Partners LP (KNOP) earns a D this week, moving down from last week’s grade of C. For more information, get Portfolio Grader’s complete analysis of KNOP stock.

This week, Arc Logistics Partners LP (ARCX) drops from a C to a D rating. 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 ARCX stock.

Crescent Point Energy Corp. (CPG) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of CPG stock.

This week, Navios Maritime Midstream Partners LP’s (NAP) rating worsens to a D from the company’s C rating a week ago. The company also gets F’s in earnings surprise and free cash flow. For more information, get Portfolio Grader’s complete analysis of NAP stock.

NGL Energy Partners LP (NGL) declines this week from a D to a F. NGL Energy Partners LP owns and operates a vertically-integrated propane business. The company also gets F’s in sales growth, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NGL stock.

Whiting Petroleum Corporation (WLL) slips from a D to a F this week. Whiting Petroleum Corporation acquires, exploits, develops and explores for crude oil, natural gas and natural gas liquids. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of WLL stock.

Synergy Resources Corporation’s (SYRG) rating weakens this week, dropping to a D versus last week’s C. Synergy Resources Corporation is engaged in oil and gas acquisitions, exploration, development and production activities, mainly in the area known as the Denver-Julesburg Basin. The company also gets F’s in earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SYRG stock.

Dynagas LNG Partners LP (DLNG) gets weaker ratings this week as last week’s C drops to a D. For more information, get Portfolio Grader’s complete analysis of DLNG stock.

Laredo Petroleum, Inc. (LPI) earns a D this week, moving down from last week’s grade of C. Laredo Petroleum, Inc. is an independent energy company which engages in exploration, development and acquisition of oil and natural gas properties in the Permian and Mid-Continent regions of the United States. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of LPI stock.

Oasis Petroleum Inc.’s (OAS) rating weakens this week, dropping to a D versus last week’s C. Oasis Petroleum Inc. is an independant exploration and production company focused on the acquisition and development of unconventional oil and natural gas resources. The company also gets F’s in sales growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of OAS stock.

Ring Energy, Inc. (REI) slips from a C to a D this week. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of REI stock.

Cobalt International Energy, Inc. (CIE) is having a tough week. The company’s rating falls from a C to a D. Cobalt International Energy, Inc. is an independent oil-focused exploration and production company. The company also gets F’s in earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CIE stock.

Slipping from a D to a F rating, Permian Basin Royalty Trust (PBT) takes a hit this week. Permian Basin Royalty Trust is the owner of overriding royalty rights in mineral properties in the United States. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of PBT stock.

Evolution Petroleum Corporation (EPM) experiences a ratings drop this week, going from last week’s C to a D. Evolution Petroleum Corporation explores for and produces oil and gas. For more information, get Portfolio Grader’s complete analysis of EPM stock.

This week, Bill Barrett Corporation (BBG) drops from a C to a D rating. Bill Barrett Corporation explores for and develops oil and natural gas in the Rocky Mountain region of the United States. The company also gets F’s in sales growth, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of BBG stock.

This is a rough week for Northern Oil and Gas, Inc. (NOG). The company’s rating falls to D from the previous week’s C. Northern Oil and Gas, Inc. is an independent energy company that acquires, explores, exploits and develops oil and natural gas properties. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NOG stock.

Sanchez Energy Corporation (SN) declines this week from a D to a F. Sanchez Energy Corporation is an independent exploration and production company focused on the exploration, acquisition and development of unconventional oil and natural gas resources. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SN stock.

This week, Jones Energy, Inc. Class A’s (JONE) rating worsens to a F from the company’s D rating a week ago. The company also gets F’s in sales growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of JONE stock.

W&T; Offshore, Inc.’s (WTI) rating weakens this week, dropping to a F versus last week’s D. W&T; Offshore, Inc. is an independent oil and natural gas producer that engages in the acquisition, exploration, and development of oil and natural gas properties primarily in the Gulf of Mexico. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of WTI stock.

This week, Aemetis, Inc.’s (AMTX) rating worsens to a F from the company’s C rating a week ago. The company also gets F’s in sales growth, operating margin growth, earnings growth, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AMTX stock.

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

This week, Comstock Resources, Inc. (CRK) drops from a C to a D rating. Comstock Resources, Inc. is an independent energy company that acquires, explores, develops, and produces oil and natural gas in the United States. The company also gets F’s in sales growth, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CRK stock.

Eclipse Resources Corp. (ECR) gets weaker ratings this week as last week’s D drops to a F. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of ECR stock.

Energy XXI Ltd (EXXI) declines this week from a C to a D. Energy XXI Ltd explores for and produces oil and natural gas. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of EXXI 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.