This week, the overall grades of 12 metals and mining stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

North American Palladium (PAL) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). North American Palladium is a mineral exploration and production company. In Portfolio Grader’s specific subcategories of Earnings Revisions, Equity and Cash Flow, PAL also gets an F. For more information, get Portfolio Grader’s complete analysis of PAL stock.

New Gold Inc. (NGD) experiences a ratings drop this week, going from last week’s D to an F. New Gold acquires, explores, and develops gold properties. To get an in-depth look at NGD, get Portfolio Grader’s complete analysis of NGD stock.

This week, McEwen Mining (MUX) drops from a D to an F rating. McEwen Mining explores for, develops, and produces mineral properties. The stock gets F’s in Earnings Growth, Equity, Cash Flow and Sales Growth. For more information, get Portfolio Grader’s complete analysis of MUX stock.

This week, Ternium S.A. Sponsored ADR’s (TX) rating worsens to an F from the company’s D rating a week ago. Ternium is a steel company that makes flat and long steel products for customers engaged in the construction, home appliances, capital goods, container, food, energy and automotive industries. The stock gets F’s in Earnings Revisions and Earnings Surprise. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. To get an in-depth look at TX, get Portfolio Grader’s complete analysis of TX stock.

Eldorado Gold Corporation’s (EGO) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. Eldorado Gold acquires, explores, and develops mineral properties. The stock gets F’s in Earnings Revisions, Earnings Surprise and Cash Flow. Margin Growth and Sales Growth also get F’s. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. The stock currently has a trailing PE Ratio of 33.60. For more information, get Portfolio Grader’s complete analysis of EGO stock.

Barrick Gold Corporation (ABX) earns an F this week, moving down from last week’s grade of D. Barrick Gold makes and sells gold, and is involved with related activities such as exploration and mine development. The stock receives F’s in Earnings Momentum, Earnings Revisions and Equity. Cash Flow and Sales Growth also get F’s. To get an in-depth look at ABX, get Portfolio Grader’s complete analysis of ABX stock.

AuRico Gold’s (AUQ) rating weakens this week, dropping to a D versus last week’s C. AuRico Gold engages in the exploration, development, and production of gold and silver projects and properties in Canada, Mexico, and Australia. The stock gets F’s in Earnings Revisions, Equity and Cash Flow. For more information, get Portfolio Grader’s complete analysis of AUQ stock.

The rating of Allied Nevada Gold (ANV) declines this week from a D to an F. Allied Nevada Gold engages in the evaluation, acquisition, exploration, and advancement of gold exploration and development projects. The stock gets F’s in Earnings Growth, Earnings Revisions and Equity. Cash Flow and Margin Growth also get F’s. As of March 10, 2015, 28.6% of outstanding Allied Nevada Gold shares were held short. To get an in-depth look at ANV, get Portfolio Grader’s complete analysis of ANV stock.

Keegan Resources (KGN) gets weaker ratings this week as last week’s C drops to a D. Keegan Resources, a junior gold company, engages in the exploration and development of gold properties in Ghana, west Africa. The stock gets F’s in Equity and Cash Flow. For more information, get Portfolio Grader’s complete analysis of KGN stock.

Pan American Silver (PAAS) is having a tough week. The company’s rating falls from a C to a D. Pan American Silver is a silver mining company with its principal property in Peru. The stock receives F’s in Earnings Growth, Earnings Revisions and Equity. Cash Flow and Sales Growth also get F’s. To get an in-depth look at PAAS, get Portfolio Grader’s complete analysis of PAAS stock.

SunCoke Energy Partners LP (SXCP) earns an F this week, falling from last week’s grade of D. The stock also gets an F in Earnings Revisions. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. For more information, get Portfolio Grader’s complete analysis of SXCP stock.

The rating of Reliance Steel & Aluminum (RS) slips from a D to an F. Reliance Steel & Aluminum operates as a metals service center company in North America. The stock also gets an F in Earnings Revisions. Shares of the stock have been exchanging at an usually rapid pace, twice the rate of the week prior. To get an in-depth look at RS, get Portfolio Grader’s complete analysis of RS 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.