This week, 3 Capital Markets stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Piper Jaffray Companies’ (PJC) ratings are looking better this week, moving up to a B from last week’s C. Piper Jaffray Companies provides investment advice and services to businesses, institutions, and individuals. The company also gets A’s in earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PJC stock.

INTL FCStone Inc. (INTL) earns a A this week, jumping up from last week’s grade of B. INTL FCStone Inc. is a financial services holding company. The company also gets A’s in operating margin growth, earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of INTL stock.

This week, U.S. Global Investors, Inc. Class A’s (GROW) ratings are up from a C last week to a B. U.S. Global Investors, Inc. Class A provides investment advisory and other services to U.S. Global Investors Funds and U.S. Global Accolade Funds, as well as offshore clients. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of GROW 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.