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

Pzena Investment Management, Inc. Class A’s (PZN) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. Pzena Investment Management is a value-oriented investment management firm. In Portfolio Grader’s specific subcategory of Earnings Surprise, PZN also gets an F. To get an in-depth look at PZN, get Portfolio Grader’s complete analysis of PZN stock.

The rating of Medallion Financial (TAXI) declines this week 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. For more information, get Portfolio Grader’s complete analysis of TAXI stock.

Artisan Partners Asset Management, Inc. Class A (APAM) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). The stock gets F’s in Equity and Cash Flow. The stock has a trailing PE Ratio of 405.80. To get an in-depth look at APAM, get Portfolio Grader’s complete analysis of APAM 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.