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

FNB United (NASDAQ:FNBN) is a bank holding company. FNBN also gets F’s in Equity and Cash Flow. For more information, get Portfolio Grader’s complete analysis of FNBN stock.

Navistar (NYSE:NAV) manufactures and markets medium and heavy trucks, school buses, mid-range diesel engines, and service parts. NAV gets F’s in Earnings Growth, Cash Flow, and Operating Margin Growth as well. Since January 1, NAV has fallen 45.4%. This is worse than the S&P 500, which has seen a 11.8% increase over the same period. The stock has a trailing PE Ratio of 158.50. For more information, get Portfolio Grader’s complete analysis of NAV stock.

Schawk (NYSE:SGK) provides strategic, creative and executional graphic services and solutions to clients in markets related to consumer products packaging, retail, pharmaceutical and advertising. SGK gets F’s in Earnings Growth, Analyst Earnings Revisions, Earnings Surprises, and Operating Margin Growth as well.

For more information, get Portfolio Grader’s complete analysis of SGK stock.

Legacy Reserves (NASDAQ:LGCY) acquires and explores for oil and natural gas properties in the United States. LGCY also gets F’s in Earnings Growth, Earnings Surprises, Cash Flow, Operating Margin Growth, and Sales Growth. Shares of the stock have declined 14.5% since January 1. For more information, get Portfolio Grader’s complete analysis of LGCY stock.

Vanguard Natural Resources (NYSE:VNR) is an independent natural gas and oil company. VNR gets F’s in Earnings Growth, Earnings Surprises, Cash Flow, Operating Margin Growth, and Sales Growth as well. The price of VNR is down 2.9% since the first of the year. The stock currently has a trailing PE Ratio of 533.60. For more information, get Portfolio Grader’s complete analysis of VNR 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.