Three packaged foods stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Post Holdings, Inc. (POST) is bumping up its rating from a C (“hold”) 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.

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

Chiquita Brands International, Inc. (CQB) improves from a C to a B rating this week. Chiquita is an international marketer and distributor of bananas and other fresh produce. The stock price has risen 16.4% 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 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.