This week, three packaged foods stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Post Holdings, Inc. (POST) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating 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. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of POST stock.

This week, Westway Group (WWAY) pushes up from a C to a B rating. 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) gets a higher grade this week, advancing from a C last week to a B. Chiquita is an international marketer and distributor of bananas and other fresh produce. With a price of $12.41, it is above the 50-day moving average of $11.29. 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.