The overall ratings of three capital markets stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Affiliated Managers Group, Inc.’s (AMG) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. 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 29.30. For a full analysis of AMG stock, visit Portfolio Grader.

This week, GFI Group (GFIG) drops from a C to a D rating. GFI Group provides brokerage services and data and analytics products to institutional clients. The stock also rates an F in Earnings Revisions. To get an in-depth look at GFIG, get Portfolio Grader’s complete analysis of GFIG stock.

Medallion Financial (TAXI) gets weaker ratings this week as last week’s C drops 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 gets an F in Earnings Surprise. For more information, get Portfolio Grader’s complete analysis of TAXI 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.