The grades of four packaged foods stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Post Holdings, Inc. (POST) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Post Holdings manufactures, markets and distributes branded ready-to-eat cereals in the U.S. and Canada. In Portfolio Grader’s specific subcategories of Earnings Revisions and Sales Growth, POST also gets A’s. For more information, get Portfolio Grader’s complete analysis of POST stock.

This is a strong week for Westway Group (WWAY). The company’s rating climbs to B from the previous week’s C. Westway Group provides bulk liquid storage and related value-added services worldwide. For more information, get Portfolio Grader’s complete analysis of WWAY stock.

Pinnacle Foods, Inc. (PF) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. For more information, get Portfolio Grader’s complete analysis of PF stock.

Chiquita Brands International, Inc. (CQB) earns a B this week, jumping up from last week’s grade of C. Chiquita is an international marketer and distributor of bananas and other fresh produce. For more information, get Portfolio Grader’s complete analysis of CQB 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.