This week's biggest % winners & losers (April 20 - 24, 2015)

The following are this week's top 20 percentage gainers and top 20 percentage losers, categorized by sectors (over $300 mln market cap and 100K average daily volume).

This week's top 20 % gainers

• Healthcare:AGEN (7.12 +27.83%),CO (7.22 +23.63%),MDSO (57.59 +23.12%),VASC (35.31 +20.8%),ADXS (23.34 +19.88%),RIGL (4.88 +19.19%)
• Materials:VALE (7.92 +34.92%),VALE.P (6.32 +28.72%),SID (2.39 +21.32%)
• Industrials:ECHO (32.68 +28.16%),SALT (2.48 +22.77%)
• Consumer Discretionary:SKX (89.66 +21.97%)
• Information Technology:GIMO (29.75 +29.35%),CCIH (14.38 +24.61%),CAMP (20.34 +23.8%),ARRS (35.76 +19.92%)
• Financials:ASPS (23.24 +33.64%),CISG (11 +25.28%)
• Utilities:EBR (2.52 +24.14%),EBR.B (3.03 +22.67%)

This week's top 20 % losers

• Healthcare:AMPE (2.73 -65.31%),AERI (12.87 -62.31%),CALA (13.41 -27%),SPNC (26.52 -23.62%),ASMB (15.46 -21.03%),CLDN (13.68 -17.22%),CPRX (3.69 -16.14%),PTX (7.09 -15.09%)
• Materials:FTK (14.06 -21.1%)
• Industrials:TRN (28.7 -19.65%)
• Consumer Discretionary:CZR (9.83 -18.42%),ICON (26.77 -16.42%)
• Information Technology:FARO (43.44 -30.19%),MOBL (6.98 -27.34%),SMCI (30.44 -17.31%),AWAY (27.18 -16.68%),ADTN (15.98 -14.45%)
• Energy:NRP (5.26 -27.85%),CRR (31.6 -18.93%),MHR (2.26 -15.99%)