For the current week, the overall ratings of four e-commerce stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, 1-800-FLOWERS.COM, Inc. Class A (FLWS) falls to a D (“sell”), worse than last week’s grade of C (“hold”). 1-800-Flowers.com provides customers around the world with the freshest flowers and finest selection of plants, gift baskets, gourmet foods and confections, and plush stuffed animals perfect for every occasion. The stock’s trailing PE Ratio is 39.10. To get an in-depth look at FLWS, get Portfolio Grader’s complete analysis of FLWS stock.

This week, PetMed Express, Inc. (PETS) drops from a C to a D rating. PetMed Express offers prescription and nonprecription pet medications, as well as health and nutritional supplements. As of Nov. 17, 2014, 26.3% of outstanding PetMed Express, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of PETS stock.

Qunar Cayman Islands Limited ADR Class B (QUNR) earns a D this week, moving down from last week’s grade of C. The stock gets F’s in Earnings Momentum, Earnings Revisions and Equity. To get an in-depth look at QUNR, get Portfolio Grader’s complete analysis of QUNR stock.

Slipping from a C to a D rating, Amazon.com, Inc. (AMZN) takes a hit this week. Amazon.com is an online retailer that offers a wide range of products. The stock gets F’s in Earnings Revisions and Earnings Surprise. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. For more information, get Portfolio Grader’s complete analysis of AMZN 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.