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

Cray (NASDAQ: CRAY) designs, develops, manufactures, markets and services high performance computing systems, commonly known as supercomputers. CRAY gets A’s in Analyst Earnings Revisions, Earnings Surprises, Equity, Cash Flow, Operating Margin Growth, and Sales Growth as well. The price of CRAY is up 93.8% since the first of the year. This is better than the Nasdaq, which has seen a 19.7% increase over the same period. The stock’s current trailing PE Ratio is 2.9. For more information, get Portfolio Grader’s complete analysis of CRAY stock.

Brookfield Residential Properties (NYSE: BRP) operates as a land developer and homebuilder in North America. BRP also gets A’s in Cash Flow and Operating Margin Growth. Shares of the stock have risen 83.6% since January 1. For more information, get Portfolio Grader’s complete analysis of BRP stock.

Nortek Inc. (NASDAQ: NTK) is a diversified manufacturer and distributor of building products for residential, light commercial, and commercial applications. NTK also gets A’s in Equity and Cash Flow. The price of NTK is up 109.4% since the first of the year. For more information, get Portfolio Grader’s complete analysis of NTK stock.

Cubist Pharmaceuticals (NASDAQ: CBST) is involved in the research, development, and commercialization of pharmaceutical products in the acute-care market. CBST gets A’s in Analyst Earnings Revisions, Earnings Surprises, Operating Margin Growth, and Sales Growth as well. The price of CBST is up 20.9% since January 1. For more information, get Portfolio Grader’s complete analysis of CBST 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.