The ratings of 5 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”).

Slipping from a C to a D rating, BHP Billiton Limited Sponsored ADR (BHP) takes a hit this week. BHP Billiton Limited Sponsored ADR is a company that is involved in the discovery, development, and conversion of natural resources. The company also gets F’s in sales growth and operating margin growth. For more information, get Portfolio Grader’s complete analysis of BHP stock.

Rio Tinto plc Sponsored ADR (RIO) is having a tough week. The company’s rating falls from a C to a D. Rio Tinto plc Sponsored ADR is an international mining group whose business is finding, mining and processing mineral resources. The company also gets F’s in sales growth and operating margin growth. For more information, get Portfolio Grader’s complete analysis of RIO stock.

This is a rough week for Commercial Metals Company (CMC). The company’s rating falls to D from the previous week’s C. Commercial Metals Company recycles, manufactures, and markets steel and metal products and other related materials. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of CMC stock.

Freeport-McMoRan, Inc. (FCX) declines this week from a C to a D. Freeport-McMoRan, Inc. is a copper, gold, and molybdenum mining company. The company also gets F’s in sales growth, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of FCX stock.

Universal Stainless & Alloy Products, Inc. (USAP) experiences a ratings drop this week, going from last week’s C 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, and free cash flow. For more information, get Portfolio Grader’s complete analysis of USAP 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.