This week, the ratings of 6 Metals & Mining stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Nucor Corporation (NUE) drops from a C to a D rating. Nucor Corporation products include carbon and alloy steel, steel joists, steel deck, cold finished steel, steel grinding balls, steel bearing products, and metal buildingsystems. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of NUE stock.

Hudbay Minerals Inc. (HBM) declines this week from a D to a F. Hudbay Minerals Inc. is a mining company that mines and produces zinc, copper, gold, and silver. The company also gets F’s in earnings growth, earnings revisions, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HBM stock.

First Majestic Silver Corp. (AG) is having a tough week. The company’s rating falls from a C to a D. First Majestic Silver Corp. is a silver producing mining company. The company also gets F’s in earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AG stock.

Eldorado Gold Corporation (EGO) experiences a ratings drop this week, going from last week’s D to a F. Eldorado Gold Corporation acquires, explores, and develops mineral properties. The company also gets F’s in sales growth, earnings growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of EGO stock.

This is a rough week for Nevsun Resources Ltd. (NSU). The company’s rating falls to F from the previous week’s D. Nevsun Resources Ltd. is a gold producer and base metal developer. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NSU stock.

Cliffs Natural Resources Inc. (CLF) gets weaker ratings this week as last week’s D drops to a F. Cliffs Natural Resources Inc. is an international mining and natural resources company. The company also gets F’s in sales growth, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CLF 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.