This week, the ratings of 5 Food & Staples Retailing stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, United Natural Foods, Inc. (UNFI) drops from a C to a D rating. United Natural Foods, Inc. distributes natural, organic, and specialty foods, as well as non-food products. For more information, get Portfolio Grader’s complete analysis of UNFI stock.

Whole Foods Market, Inc. (WFM) declines this week from a C to a D. Whole Foods Market, Inc. is a natural and organic foods supermarket with stores in the United States, Canada and the United Kingdom. For more information, get Portfolio Grader’s complete analysis of WFM stock.

This is a rough week for SUPERVALU INC. (SVU). The company’s rating falls to D from the previous week’s C. SUPERVALU INC. operates as a grocery retailer that also provides supply chain services, mainly wholesale distribution. For more information, get Portfolio Grader’s complete analysis of SVU stock.

Slipping from a C to a D rating, Liberator Medical Holdings, Inc. (LBMH) takes a hit this week. The company also gets F’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of LBMH stock.

Fairway Group Holdings Corp. Class A (FWM) is having a tough week. The company’s rating falls from a C to a D. The company also gets F’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of FWM 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.