Top 10 Best-Performing Pharmaceutical Stocks Year-to-Date: AMPE, VRUS, ARIA, NATR, VICL, HSKAD, INSMD, VRX, CPRX, AMRN (Jul 04, 2011)

Ampio Pharmaceuticals, Inc. (NASDAQ:AMPE) is the 1st best-performing stock year-to-date in this segment of the market. It has risen 220.83% since the beginning of this year. Its price percentage change was 450.00% for the last 52 weeks. Pharmasset, Inc. (NASDAQ:VRUS) is the 2nd best-performing stock year-to-date in this segment of the market. It has risen 158.82% since the beginning of this year. Its price percentage change was 335.29% for the last 52 weeks. Ariad Pharmaceuticals, Inc. (NASDAQ:ARIA) is the 3rd best-performing stock year-to-date in this segment of the market. It has risen 126.27% since the beginning of this year. Its price percentage change was 319.64% for the last 52 weeks.Nature's Sunshine Prod. (NASDAQ:NATR) is the 4th best-performing stock year-to-date in this segment of the market. It has risen 117.15% since the beginning of this year. Its price percentage change was 124.14% for the last 52 weeks. Vical Incorporated (NASDAQ:VICL) is the 5th best-performing stock year-to-date in this segment of the market. It has risen 103.47% since the beginning of this year. Its price percentage change was 31.31% for the last 52 weeks.Heska Corporation (NASDAQ:HSKAD) is the 6th best-performing stock year-to-date in this segment of the market. It has risen 91.43% since the beginning of this year. Its price percentage change was 43.86% for the last 52 weeks.Insmed Incorporated (NASDAQ:INSMD) is the 7th best-performing stock year-to-date in this segment of the market. It has risen 91.34% since the beginning of this year. Its price percentage change was 82.52% for the last 52 weeks.Valeant Pharmaceuticals Int (USA) (NYSE:VRX) is the 8th best-performing stock year-to-date in this segment of the market. It has risen 84.91% since the beginning of this year. Its price percentage change was 182.76% for the last 52 weeks. Catalyst Pharmaceutical Partners, Inc. (NASDAQ:CPRX) is the 9th best-performing stock year-to-date in this segment of the market. It has risen 83.84% since the beginning of this year. Its price percentage change was 83.84% for the last 52 weeks. Amarin Corporation plc (ADR) (NASDAQ:AMRN) is the 10th best-performing stock year-to-date in this segment of the market. It has risen 80.22% since the beginning of this year. Its price percentage change was 528.94% for the last 52 weeks.