The ratings of 6 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”).

TD Ameritrade Holding Corporation’s (AMTD) rating weakens this week, dropping to a D versus last week’s C. TD Ameritrade Holding Corporation provides securities brokerage services and technology-based financial services to retail investors, traders, financial planners, institutions and business partners. For more information, get Portfolio Grader’s complete analysis of AMTD stock.

Federated Investors, Inc. Class B (FII) slips from a C to a D this week. Federated Investors, Inc. Class B provides investment management products and related financial services. For more information, get Portfolio Grader’s complete analysis of FII stock.

Investment Technology Group, Inc. (ITG) gets weaker ratings this week as last week’s C drops to a D. Investment Technology Group, Inc. is an agency brokerage and financial technology firm that partners with asset managers globally to provide innovative solutions spanning the investment continuum. The company also gets F’s in sales growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of ITG stock.

Ares Management LP (ARES) experiences a ratings drop this week, going from last week’s C to a D. The company also gets F’s in earnings growth, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ARES stock.

This week, Manning & Napier, Inc. Class A’s (MN) rating worsens to a D from the company’s C rating a week ago. Manning & Napier, Inc. Class A is an independent investment management firm that provides a broad range of investment solutions through separately managed accounts, mutual funds and collective investment trust funds. The company also gets F’s in sales growth and earnings momentum. For more information, get Portfolio Grader’s complete analysis of MN stock.

National Holdings Corporation (NHLD) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in operating margin growth. For more information, get Portfolio Grader’s complete analysis of NHLD 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.