This week, the overall grades of three capital markets stocks are lower, according to the Portfolio Grader database. 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. In Portfolio Grader’s specific subcategory of Earnings Revisions, GFIG also gets an F. For a full analysis of GFIG stock, visit Portfolio Grader.

Medallion Financial’s (TAXI) rating weakens this week, dropping to a D versus last week’s C. Medallion Financial is a specialty finance company that originates and services loans financing the purchase of taxicab medallions and related assets. The stock also gets an F in Earnings Surprise. For more information, get Portfolio Grader’s complete analysis of TAXI stock.

This week, Affiliated Managers Group, Inc.’s (AMG) rating worsens to a D from the company’s C rating a week ago. 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 stock has a trailing PE Ratio of 31.30. To get an in-depth look at AMG, 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.