For the current week, the overall ratings of five metals and mining stocks are worse, according to the Portfolio Graderdatabase. 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. To get an in-depth look at PAL, get Portfolio Grader’s complete analysis of PAL stock.

This is a rough week for RTI International Metals, Inc. (RTI). The company’s rating falls to F from the previous week’s D. RTI International Metals manufactures and distributes titanium and specialty metal mill products, extruded shapes, and engineered systems. The stock also gets an F in Margin Growth. The trailing PE Ratio for the stock is 61.60. For more information, get Portfolio Grader’s complete analysis of RTI stock.

Haynes International, Inc. (HAYN) experiences a ratings drop this week, going from last week’s D to an F. Haynes International develops, manufactures, and markets high performance alloys, primarily for use in the aerospace and chemical processing industries. The stock gets F’s in Earnings Revisions and Margin Growth. The stock currently has a trailing PE Ratio of 133.40. To get an in-depth look at HAYN, get Portfolio Grader’s complete analysis of HAYN stock.

Keegan Resources’ (KGN) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. 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.

Ampco-Pittsburgh Corporation (AP) earns a D this week, falling from last week’s grade of C. Ampco-Pittsburgh is engaged in manufacturing and selling custom-engineered equipment in a global marketplace. The stock gets F’s in Earnings Growth, Earnings Momentum and Margin Growth. To get an in-depth look at AP, get Portfolio Grader’s complete analysis of AP 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.