The ratings of 7 Metals & Mining stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This is a rough week for Southern Copper Corporation (SCCO). The company’s rating falls to D from the previous week’s C. Southern Copper Corporation is an integrated copper producer. For more information, get Portfolio Grader’s complete analysis of SCCO stock.

This week, Allegheny Technologies Incorporated’s (ATI) rating worsens to a D from the company’s C rating a week ago. Allegheny Technologies Incorporated produces specialty metals such as titanium alloys and superalloys. 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 ATI stock.

Hi-Crush Partners LP (HCLP) declines this week from a C to a D. 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 HCLP stock.

Ampco-Pittsburgh Corporation (AP) experiences a ratings drop this week, going from last week’s C to a D. Ampco-Pittsburgh Corporation is engaged in manufacturing and selling custom-engineered equipment in a global marketplace. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of AP stock.

Universal Stainless & Alloy Products, Inc. (USAP) is having a tough week. The company’s rating falls from a C to a D. Universal Stainless & Alloy Products, Inc. manufactures and markets semi-finished and finished specialty steel products, including stainless steel, tool steel, and certain other alloyed steels. The company also gets F’s in sales growth, operating margin growth, and free cash flow. For more information, get Portfolio Grader’s complete analysis of USAP stock.

SunCoke Energy, Inc. (SXC) earns a D this week, moving down from last week’s grade of C. SunCoke Energy, Inc. in addition to mining and producing coal in the Americas, offers metallurgical and thermal coal used in steelmaking facilities. The company also gets F’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SXC stock.

Mechel PAO Sponsored ADR (MTL) gets weaker ratings this week as last week’s C drops to a D. Mechel PAO Sponsored ADR is a Russian metals and mining company, uniting producers of steel, rolled products, hardware, coal, iron ore concentrate, and nickel. The company also gets F’s in sales growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of MTL 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.