This week, these ten stocks, all currently earning A’s (“strong buy”) on Portfolio Grader, have the best year-to-date performance.

Since January 1, China Biologic Products, Inc. (CBPO) has jumped 35.9%. China Biologic Products is a biopharmaceutical company that engages in the research, development, manufacture, and sale of human plasma-based biopharmaceutical products to hospitals and inoculation centers. For more information, get Portfolio Grader’s complete analysis of CBPO stock.

Since January 1, the price of Vipshop Holdings Ltd Sponsored ADR (VIPS) has grown 38.8%. Vipshop Holdings operates as an online discount retailer for various brands in the People’s Republic of China. For more information, get Portfolio Grader’s complete analysis of VIPS stock.

The price of Ingles Markets, Incorporated Class A (IMKTA) has seen a 41.5% boost since the first of the year. Ingles Markets operates a supermarket chain in the southeastern United States. For more information, get Portfolio Grader’s complete analysis of IMKTA stock.

Since January 1, Stamps.com (STMP) has jumped 43.2%. Stamps.com is an Internet-based company that allows customers to send mail. For more information, get Portfolio Grader’s complete analysis of STMP stock.

Since January 1, 1-800-FLOWERS.COM, Inc. Class A (FLWS) has shot up 44.4%. 1-800-Flowers.com provides customers around the world with the freshest flowers and finest selection of plants, gift baskets, gourmet foods and confections, and plush stuffed animals perfect for every occasion. For more information, get Portfolio Grader’s complete analysis of FLWS stock.

Shares of Impax Laboratories, Inc. (IPXL) have risen 46% since January 1. Impax Laboratories develops, manufactures, and markets both proprietary and multi-source pharmaceutical products utilizing its drug delivery technologies. For more information, get Portfolio Grader’s complete analysis of IPXL stock.

Since January 1, Insperity, Inc. (NSP) has climbed 50.4%. Insperity provides personnel management that encompasses a range of services, including benefits and payroll administration, health and workers’ compensation insurance programs and personnel records management. For more information, get Portfolio Grader’s complete analysis of NSP stock.

Since the first of the year, the price of Grupo Financiero Galicia SA Sponsored ADR Class B (GGAL) has swelled 52.6%. Grupo Financiero Galicia is a financial services holding company. The stock currently has a trailing PE Ratio of 8.00. For more information, get Portfolio Grader’s complete analysis of GGAL stock.

Ebix, Inc. (EBIX) has risen 80.8% since the first of the year. Ebix provides a series of application software products for the insurance industry, including carrier systems and agency systems. For more information, get Portfolio Grader’s complete analysis of EBIX stock.

Since the first of the year, shares of ABIOMED, Inc. (ABMD) have soared 91.6%. Abiomed provides medical devices in circulatory support and it offers a continuum of care in heart recovery to acute heart failure patients. For more information, get Portfolio Grader’s complete analysis of ABMD 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.