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

PartnerRe (NYSE: PRE) provides multi-line reinsurance to insurance companies on a worldwide basis through its wholly owned subsidiaries. PRE also gets A’s in Analyst Earnings Revisions, Earnings Surprises, and Cash Flow. The stock has a trailing PE Ratio of 8.2. The stock’s dividend yield is 2.5%. Shares of PRE have increased 12.8% since the beginning of the year. This is better than the S&P 500, which increased 9.7% for the same period. For more information, get Portfolio Grader’s complete analysis of PRE stock.

US Airways (NYSE: LCC) provides air transportation for passengers and cargo. LCC gets A’s in Earnings Growth, Analyst Earnings Revisions, Equity, and Operating Margin Growth as well. Since January 1, LCC has jumped 126%. The stock currently has a trailing PE Ratio of 4.9.For more information, get Portfolio Grader’s complete analysis of LCC stock.

Nortek Inc. (NASDAQ: NTK) is a diversified manufacturer and distributor of building products for residential, light commercial, and commercial applications. Since January 1, NTK has jumped 95%. For more information, get Portfolio Grader’s complete analysis of NTK stock.

Smith & Wesson (NASDAQ: SWHC) provides products and services for safety, security, protection, and sport. SWHC also gets A’s in Earnings Growth, Analyst Earnings Revisions, Earnings Surprises, Equity, Operating Margin Growth, and Sales Growth. The price of SWHC is up 131.7% since the first of the year. For more information, get Portfolio Grader’s complete analysis of SWHC 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.