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”).

Real Industry, Inc.’s (RELY) rating weakens this week, dropping to a F versus last week’s D. The company also gets F’s in earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of RELY stock.

ArcelorMittal SA ADR (MT) declines this week from a C to a D. ArcelorMittal SA ADR produces steel. 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 MT stock.

Constellium NV Class A (CSTM) earns a D this week, moving down from last week’s grade of C. The company also gets F’s in sales growth, earnings revisions, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CSTM stock.

Nevsun Resources Ltd. (NSU) experiences a ratings drop this week, going from last week’s C to a D. Nevsun Resources Ltd. is a gold producer and base metal developer. The company also gets F’s in sales growth, operating margin growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of NSU 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.