This week, the overall grades of six capital markets stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Wisdomtree Investments, Inc.’s (WETF) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. WisdomTree Investments operates as an exchange-traded funds sponsor and asset manager. In Portfolio Grader’s specific subcategory of Earnings Momentum, WETF also gets an F. The stock currently has a trailing PE Ratio of 31.20. For more information, get Portfolio Grader’s complete analysis of WETF stock.

This week, Stifel Financial (SF) drops from a C to a D rating. Stifel Financial is engaged in financial services such as retail brokerage, securities trading, investment banking, and consumer and commercial banking. The stock also rates an F in Earnings Growth. To get an in-depth look at SF, get Portfolio Grader’s complete analysis of SF stock.

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 is a rough week for Ellington Financial (EFC). The company’s rating falls to D from the previous week’s C. Ellington Financial acquires and manages mortgage-related assets. The stock gets F’s in Earnings Surprise and Sales Growth. To get an in-depth look at EFC, get Portfolio Grader’s complete analysis of EFC stock.

This week, Silvercrest Asset Management Group, Inc. Class A’s (SAMG) rating worsens to a D from the company’s C rating a week ago. The stock also gets an F in Margin Growth. For more information, get Portfolio Grader’s complete analysis of SAMG stock.

The rating of Safeguard Scientifics, Inc. (SFE) slips from a C to a D. Safeguard Scientifics offers growth capital and strategic and operational support to life sciences and information technology companies. The stock gets F’s in Earnings Momentum and Earnings Revisions. To get an in-depth look at SFE, get Portfolio Grader’s complete analysis of SFE 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.