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

This week, GFI Group (GFIG) falls to a D (“sell”), worse than last week’s grade of C (“hold”). GFI Group provides brokerage services and data and analytics products to institutional clients. GFIG also rates an F in Portfolio Grader’s specific subcategory of Earnings Revisions. For more information, get Portfolio Grader’s complete analysis of GFIG stock.

Medallion Financial (TAXI) is having a tough week. The company’s rating falls from a C to a D. Medallion Financial is a specialty finance company that originates and services loans financing the purchase of taxicab medallions and related assets. The stock also rates an F in Earnings Surprise. To get an in-depth look at TAXI, get Portfolio Grader’s complete analysis of TAXI stock.

The rating of Affiliated Managers Group, Inc. (AMG) declines this week from a C to a D. Affiliated Managers operates as an asset management company providing investment management services to mutual funds, institutional clients, and high net worth individuals in the United States. The trailing PE Ratio for the stock is 27.50. For more information, get Portfolio Grader’s complete analysis of AMG 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.