This week, these five stocks have the worst ratings in Earnings Revisions, one of the eight Fundamental Categories on Portfolio Grader.

Aralez Pharmaceuticals Inc.. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ARLZ stock.

Apache Corporation (APA) is an energy company that discovers, develops and produces natural gas, crude oil and natural gas liquids. The company also gets F’s in sales growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of APA stock.

Synacor, Inc. (SYNC) provides authentication and aggregation solutions for delivery of online content and services. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SYNC stock.

Forum Energy Technologies, Inc. (FET) is a global oilfield products company, serving the subsea, drilling, completion, production and process sectors of the oil and natural gas industry. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of FET stock.

Clear Channel Outdoor Holdings, Inc. Class A (CCO) owns and operates advertising display faces primarily in the United States, Canada, Latin America, Asia, Australia, and Europe. The company also gets F’s in earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of CCO 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.