This week, these ten stocks have the worst year-to-date performance. Each of these also rates an “F” (“strong sell”) on Portfolio Grader. Since the beginning of the year, the Nasdaq increased 6%, the Dow is up 9.6%, and the S&P is up 8.2%.

The price of Silvercorp Metals (NYSE:SVM) is down 42% since the first of the year. Silvercorp Metals is involved with the acquisition, exploration and development of silver-related mineral properties in China. For more information, get Portfolio Grader’s complete analysis of SVM stock.

Shares of Mechel (NYSE:MTL) have fallen 42.4% since January 1. Mechel is a Russian metals and mining company, uniting producers of steel, rolled products, hardware, coal, iron ore concentrate, and nickel. For more information, get Portfolio Grader’s complete analysis of MTL stock.

Shares of Cliffs Natural Resources (NYSE:CLF) have slumped 42.9% since January 1. Cliffs Natural Resources is an international mining and natural resources company. As of May 2, 2013, 23.8% of outstanding Cliffs Natural Resources shares were held short. For more information, get Portfolio Grader’s complete analysis of CLF stock.

Since the first of the year, Harmony Gold Mining (NYSE:HMY) has tumbled 43.4%. Harmony Gold Mining is a mining company which produces gold from its operations in the district of Virginia, Orange Free State. For more information, get Portfolio Grader’s complete analysis of HMY stock.

Since January 1, Molycorp (NYSE:MCP) has fallen 43.4%. Molycorp produces rare earth products, including oxides, metals, alloys and magnets for a variety of applications including clean energy technologies, technology, and defense applications. As of May 2, 2013, 24.1% of outstanding Molycorp shares were held short. For more information, get Portfolio Grader’s complete analysis of MCP stock.

Since the first of the year, Barrick Gold (NYSE:ABX) has dipped 44.3%. Barrick Gold makes and sells gold, and is involved with related activities such as exploration and mine development. For more information, get Portfolio Grader’s complete analysis of ABX stock.

Shares of NovaGold Resources (AMEX:NG) have dipped 46.7% since the first of the year. NovaGold Resources explores and develops mineral properties in North America. The stock has a trailing PE Ratio of 41.00. For more information, get Portfolio Grader’s complete analysis of NG stock.

Since the first of the year, the price of Walter Energy Inc. (NYSE:WLT) is down 49.4%. Walter Energy is a producer and exporter of metallurgical coal for the global steel industry. As of May 2, 2013, 13.3% of outstanding Walter Energy Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of WLT stock.

Since January 1, Banro Corp. (AMEX:BAA) has plunged 51.9%. Banro Corporation is engaged in the exploration and development of four gold properties, which are known as Twangiza, Namoya, Lugushwa and Kamituga. For more information, get Portfolio Grader’s complete analysis of BAA stock.

Shares of IAMGOLD Corp. (NYSE:IAG) have sunk 53.6% since the first of the year. Iamgold is involved in the exploration for, and development and production of mineral resource properties throughout the world. 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.