This week, 5 Metals & Mining stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Compania de Minas Buenaventura SAA Sponsored ADR’s (BVN) ratings are looking better this week, moving up to a A from last week’s B. Compania de Minas Buenaventura SAA Sponsored ADR is a precious metals company engaged in the exploration, mining, and processing of gold, silver and, to a lesser extent, other metals. The company also gets A’s in earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of BVN stock.

This week, Ryerson Holding Corporation’s (RYI) ratings are up from a B last week to a A. The company also gets A’s in earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of RYI stock.

This week, Hecla Mining Company (HL) pushes up from a B to a A rating. Hecla Mining Company explores, develops, and mines precious metals, gold, and silver. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of HL stock.

Yamana Gold Inc. (AUY) gets a higher grade this week, advancing from a B last week to a A. Yamana Gold Inc. is a gold producer with significant gold production, gold development stage properties, exploration properties, and land positions in Brazil, Chile, Argentina, Mexico, and Colombia. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of AUY stock.

This is a strong week for Harmony Gold Mining Co. Ltd. Sponsored ADR (HMY). The company’s rating climbs to A from the previous week’s B. Harmony Gold Mining Co. Ltd. Sponsored ADR is a mining company that produces gold from its operations in the district of Virginia, Orange Free State. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of HMY 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.