The overall ratings of 3 Metals & Mining stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Kaiser Aluminum Corporation (KALU) experiences a ratings drop this week, going from last week’s C to a D. Kaiser Aluminum Corporation produces alumina, primary aluminum, and fabricated aluminum products. The company also gets F’s in earnings surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of KALU stock.

This is a rough week for Carpenter Technology Corporation (CRS). The company’s rating falls to D from the previous week’s C. Carpenter Technology Corporation makes and distributes specialty metals and alloys. The company also gets F’s in sales growth, operating margin growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CRS stock.

Allegheny Technologies Incorporated (ATI) slips from a C to a D this week. Allegheny Technologies Incorporated produces specialty metals such as titanium alloys and superalloys. The company also gets F’s in sales growth, operating margin growth, earnings revisions, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ATI 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.