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”).

Compass Minerals International, Inc. (CMP) declines this week from a C to a D. Compass Minerals International, Inc. produces highway deicing salt in North America and the United Kingdom. For more information, get Portfolio Grader’s complete analysis of CMP stock.

This is a rough week for Ampco-Pittsburgh Corporation (AP). The company’s rating falls to F from the previous week’s D. Ampco-Pittsburgh Corporation is engaged in manufacturing and selling custom-engineered equipment in a global marketplace. For more information, get Portfolio Grader’s complete analysis of AP stock.

SunCoke Energy Partners LP (SXCP) slips from a D to a F this week. For more information, get Portfolio Grader’s complete analysis of SXCP stock.

Slipping from a C to a D rating, Sandstorm Gold Ltd. (SAND) takes a hit this week. Sandstorm Gold Ltd. a gold streaming company, focuses on acquiring gold and other precious metal purchase agreements from companies that have advanced stage development projects or operating mines primarily in Canada, Brazil, and Mexico. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SAND stock.

This week, B2Gold Corp.’s (BTG) rating worsens to a D from the company’s C rating a week ago. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of BTG 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.