The grades of seven packaged foods stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, Pilgrim’s Pride Corporation (PPC) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Pilgrim’s Pride produces prepared and fresh chicken products in the United States and Mexico. In Portfolio Grader’s specific subcategories of Earnings Growth, Equity, Cash Flow and Margin Growth, PPC also gets A’s. For more information, get Portfolio Grader’s complete analysis of PPC stock.

Post Holdings, Inc. (POST) earns a B this week, jumping up from last week’s grade of C. Post Holdings manufactures, markets and distributes branded ready-to-eat cereals in the U.S. and Canada. The stock price has risen 10.1% over the past month, better than the 1.7% decrease the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of POST stock.

John B. Sanfilippo & Son, Inc. (JBSS) shows solid improvement this week. The company’s rating rises from a C to a B. John B. Sanfilippo & Son processes, packages, markets, and distributes shelled nuts, in-shell nuts, and sesame sticks. For more information, get Portfolio Grader’s complete analysis of JBSS stock.

Westway Group (WWAY) improves from a C to a B rating this week. Westway Group provides bulk liquid storage and related value-added services worldwide. For more information, get Portfolio Grader’s complete analysis of WWAY stock.

The rating of J & J Snack Foods Corp. (JJSF) moves up this week, rising from a C to a B. J & J Snack Foods manufactures, markets, and distributes a variety of snack foods and beverages for the food service and retail supermarket industries. For more information, get Portfolio Grader’s complete analysis of JJSF stock.

TreeHouse Foods, Inc. (THS) earns a B this week, jumping up from last week’s grade of C. TreeHouse Foods manufactures foods that mainly service the retail grocery and foodservice distribution channels. For more information, get Portfolio Grader’s complete analysis of THS stock.

This week, Sanderson Farms, Inc. (SAFM) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. Sanderson Farms is a fully-integrated poultry processing company engaged in the production, processing, marketing and distribution of fresh and frozen chicken products. For more information, get Portfolio Grader’s complete analysis of SAFM 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.