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

NAO gets F’s in Analyst Earnings Revisions and Cash Flow as well. For more information, get Portfolio Grader’s complete analysis of NAO stock.

MicroVision, Inc. (MVIS) develops miniature display and imaging engines based on an integrated photonics module (IPM) in the United States and internationally. MVIS gets F’s in Analyst Earnings Revisions, Equity, Cash Flow and Sales Growth as well. For more information, get Portfolio Grader’s complete analysis of MVIS stock.

NVIV also gets F’s in Earnings Momentum and Equity. For more information, get Portfolio Grader’s complete analysis of NVIV stock.

FBIO gets F’s in Equity and Cash Flow as well. For more information, get Portfolio Grader’s complete analysis of FBIO stock.

CARBO Ceramics (CRR) manufactures and supplies resin-coated ceramic and resin-coated sand proppants primarily used in the hydraulic fracturing of natural gas and oil wells in the United States and internationally. CRR also gets F’s in Earnings Growth, Earnings Momentum, Analyst Earnings Revisions, Cash Flow and Sales Growth. The stock has a trailing PE Ratio of 120.60. For more information, get Portfolio Grader’s complete analysis of CRR 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.