The ratings of 4 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”).

Universal Stainless & Alloy Products, Inc. (USAP) gets weaker ratings this week as last week’s C drops 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, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of USAP stock.

Constellium NV Class A’s (CSTM) rating weakens this week, dropping to a D versus last week’s B. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of CSTM stock.

This week, Real Industry, Inc. (RELY) drops from a D to a F rating. The company also gets F’s in sales growth, earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of RELY stock.

Platinum Group Metals Ltd. (PLG) is having a tough week. The company’s rating falls from a C to a D. Platinum Group Metals Ltd. acquires, explores, and develops platinum properties. The company also gets F’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of PLG 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.