The grades of six capital markets stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Ameriprise Financial, Inc. (AMP) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Ameriprise Financial provides a range of financial products and services in the United States and internationally. In Portfolio Grader’s specific subcategories of Earnings Growth and Margin Growth, AMP also gets A’s. Shares of AMP have increased 8.4% over the past month, better than the 1.7% decrease the S&P 500 has seen over the same period of time. At present, the stock has a dividend yield of 2.1%. For more information, get Portfolio Grader’s complete analysis of AMP stock.

This week, THL Credit (TCRD) pushes up from a B to an A rating. THL Credit is a management investment company that invests mainly in private subordinated debt, also known as mezzanine debt. For more information, get Portfolio Grader’s complete analysis of TCRD stock.

This week, Och-Ziff Capital Management Group LLC Class A’s (OZM) ratings are up from a B last week to an A. Och-Ziff Capital Management provides a variety of alternative asset management services for fund investors through locations in the United States, Europe, and Asia. Wall Street seems to agree with the upgrade and has propelled the stock up 7.7% over the past month. For more information, get Portfolio Grader’s complete analysis of OZM stock.

This is a strong week for Ares Capital Corporation (ARCC). The company’s rating climbs to A from the previous week’s B. Ares Capital is a specialty finance company that invests mainly in first- and second-lien senior loans and mezzanine debt, which in some cases includes equity components like warrants. For more information, get Portfolio Grader’s complete analysis of ARCC stock.

Cowen Group, Inc. Class A (COWN) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Cowen Group is a publicly owned asset management holding company. For more information, get Portfolio Grader’s complete analysis of COWN stock.

BGC Partners, Inc. Class A (BGCP) improves from a B to an A rating this week. BGC Partners is a global inter-dealer broker that specializes in the brokering of OTC financial instruments and related derivative products. Investors seem to agree with the upgraded status of the stock and have pushed the stock up 6% over the past month. For more information, get Portfolio Grader’s complete analysis of BGCP 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.