This week, the overall grades of 5 Metals & Mining stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Stillwater Mining Company (SWC) gets weaker ratings this week as last week’s D drops to a F. Stillwater Mining Company is engaged in the development, extraction, processing, refining and marketing of palladium, platinum and associated metals from a geological formation in south central Montana known as the J-M Reef and from the recycling of spent catalytic converters. The company also gets F’s in sales growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of SWC stock.

This week, First Majestic Silver Corp. (AG) drops from a C to a D rating. 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.

Coeur Mining, Inc.’s (CDE) rating weakens this week, dropping to a D versus last week’s C. Coeur Mining, Inc. explores, develops, operates, and/or owns silver and gold mining properties and companies. The company also gets F’s in earnings growth, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of CDE stock.

This is a rough week for Hecla Mining Company (HL). The company’s rating falls to D from the previous week’s C. Hecla Mining Company explores, develops, and mines precious metals, gold, and silver. The company also gets F’s in sales growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of HL stock.

IAMGOLD Corporation (IAG) slips from a C to a D this week. IAMGOLD Corporation is involved in the exploration for, and development and production of mineral resource properties throughout the world. The company also gets F’s in sales growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of IAG 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.