4 Diversified Financial Services stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Moody’s Corporation (MCO) boosts its rating from a C to a B this week. Moody’s Corporation offers financial products and services such as credit ratings, data and analytical tools, risk management software, and training. For more information, get Portfolio Grader’s complete analysis of MCO stock.

This week, McGraw Hill Financial, Inc. (MHFI) pushes up from a C to a B rating. McGraw Hill Financial, Inc. provides credit ratings, benchmarks, and analytics to capital and commodity markets worldwide. The company also gets A’s in earnings momentum and return on equity. For more information, get Portfolio Grader’s complete analysis of MHFI stock.

CBOE Holdings, Inc. (CBOE) improves from a C to a B rating this week. CBOE Holdings, Inc. operates markets for the trading of listed derivatives. The company also gets A’s in sales growth, earnings growth, and return on equity. For more information, get Portfolio Grader’s complete analysis of CBOE stock.

This is a strong week for Marlin Business Services Corp. (MRLN). The company’s rating climbs to B from the previous week’s C. Marlin Business Services Corp. is a nationwide provider of equipment leasing solutions primarily to small businesses. For more information, get Portfolio Grader’s complete analysis of MRLN 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.