This week's biggest % gainers/losers (October 14 - October 18, 2013)

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

• Utilities: TGS (2.79 +20.35%)
• Technology: PRKR (6.39 +108.05%), SCTY (59.46 +41.12%), BITA (24.32 +29.5%), NQ (24.92 +24.19%)
• Services: SAVE (43.05 +27.07%), ENV (35.95 +19.81%), AAP (98.7 +18.91%)
• Industrial Goods: MY (3.36 +28.9%), CECE (18.83 +21.18%)
• Healthcare: GERN (4.28 +42.57%), INSM (15.25 +25.82%), OPK (11.6 +23.62%), KERX (11.26 +23.43%), ZIOP (4.94 +19.63%)
• Financial: NOAH (21.06 +34.87%)
• Basic Materials: MPO (6.45 +26.03%), MTDR (21 +21.45%), BVN (13.78 +18.85%)

This week's top 20 % losers

• Utilities: ATLS (46.44 -9.35%)
• Technology: TDC (42.64 -19.3%), UTEK (25.48 -14.04%), DMD (5.2 -13.23%), SGI (14.5 -12.05%), QTM (1.38 -10.46%), VECO (34.44 -10.05%), CRAY (23.54 -9.33%)
• Services: OSTK (26.07 -10.34%), GDOT (20.95 -10.16%)
• Industrial Goods: SWK (77.16 -17.6%), FLIR (29.43 -9.97%)
• Healthcare: AMRN (2.03 -68.45%), ARIA (2.67 -16.82%), ECYT (11.3 -16.11%), IMMU (4.47 -8.99%)
• Consumer Goods: SCSS (18.6 -26.2%), CQB (11.52 -9.87%)
• Basic Materials: MCP (5.36 -22.03%), ANW (10.5 -10.47%)