This week, these ten stocks have the worst year-to-date performance. Each of these also rates an “F” (“strong sell”) on Portfolio Grader.

The price of Elizabeth Arden, Inc. (RDEN) has fallen 52.4% since the first of the year. Elizabeth Arden manufactures, distributes, and markets prestige fragrances and related skin treatment and cosmetic products for men and women. Shares of the stock have been changing hands at an unusually rapid pace, up 95.3% from the week prior. For more information, get Portfolio Grader’s complete analysis of RDEN stock.

Since the first of the year, CGG Sponsored ADR (CGG) has tumbled 53.3%. CGG provides geophysical services and software products and manufactures geophysical equipment. Shares of the stock are being traded at a very rapid pace, up 161.8% from the week prior. For more information, get Portfolio Grader’s complete analysis of CGG stock.

Shares of Clean Energy Fuels (CLNE) have slumped 53.8% since January 1. Clean Energy Fuels sells natural gas fueling solutions to its customers mainly in the United States and Canada. As of Oct. 16, 2014, 18% of outstanding Clean Energy Fuels shares were held short. For more information, get Portfolio Grader’s complete analysis of CLNE stock.

Shares of EXCO Resources, Inc. (XCO) have slumped 54.9% since the first of the year. EXCO Resources is an oil and natural gas company involved in the exploration, exploitation, development and production of onshore North American oil and natural gas properties. As of Oct. 16, 2014, 13.4% of outstanding EXCO Resources, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of XCO stock.

Since the first of the year, Coeur Mining, Inc. (CDE) has dipped 57%. Coeur Mining explores, develops, operates, and/or owns silver and gold mining properties and companies. As of Oct. 16, 2014, 10.9% of outstanding Coeur Mining, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of CDE stock.

Shares of Arch Coal, Inc. (ACI) have dipped 65.1% since the first of the year. Arch Coal produces coal and sells it to power plants, steel mills, and industrial facilities. As of Oct. 16, 2014, 22.2% of outstanding Arch Coal, Inc. shares were held short. Trade volume is up 100.8% from the previous week. For more information, get Portfolio Grader’s complete analysis of ACI stock.

Shares of Aeropostale, Inc. (ARO) have fallen 65.9% since January 1. Aeropostale is a mall-based specialty retailer of casual apparel and accessories. As of Oct. 16, 2014, 28.2% of outstanding Aeropostale, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of ARO stock.

Since the first of the year, Energy XXI (Bermuda) Limited (EXXI) has dipped 70.7%. Energy XXI explores for and produces oil and natural gas. As of Oct. 16, 2014, 17.6% of outstanding Energy XXI (Bermuda) Limited shares were held short. For more information, get Portfolio Grader’s complete analysis of EXXI stock.

Since January 1, Alpha Natural Resources, Inc. (ANR) has fallen 73.4%. Alpha Natural Resources produces, processes and sells steam and metallurgical coal. As of Oct. 16, 2014, 25.6% of outstanding Alpha Natural Resources, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of ANR stock.

Shares of Walter Energy (WLT) have slipped 89.9% since January 1. Walter Energy is a producer and exporter of metallurgical coal for the global steel industry. As of Oct. 16, 2014, 12.6% of outstanding Walter Energy shares were held short. For more information, get Portfolio Grader’s complete analysis of WLT 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.