This week's biggest % gainers/losers (January 27 - January 31, 2014)

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

• Technology: INFN (8.73 +23.11%), ACCL (12.58 +20.06%), GAME (6.45 +18.52%), CLFD (24.95 +18.48%), VRNG (4.29 +15.28%), FSL (18.13 +14.41%)
• Services: ISLE (9.56 +13.7%)
• Healthcare: PRAN (11.6 +39.32%), ARWR (15.34 +30.77%), BDSI (7.85 +28.64%), CSII (33.92 +19.39%), PRTA (30.94 +18.89%), CORT (3.44 +18.79%), ALXN (158.73 +17.44%), HZNP (9.86 +16.88%), TXMD (6.58 +14.43%)
• Consumer Goods: UA (108.11 +24.86%), PBI (25.18 +15.5%), HAR (103.43 +14.23%)
• Basic Materials: KRA (25.01 +13.39%)

This week's top 20 % losers

• Technology: NSR (33.89 -22.95%), VIP (9.69 -22.06%), NTLS (16.41 -18.17%), IGT (14.43 -17.28%), SHOR (7.7 -16.4%)
• Services: ESI (29.4 -33.32%), OSTK (21.06 -23.78%), EDMC (6.93 -22.68%), RCII (24.94 -20.26%), ADT (30.04 -19.11%), NGVC (37.97 -17.22%), JCP (5.92 -15.64%)
• Healthcare: PGNX (4.78 -22.73%), EPZM (30.4 -19.95%), CTIC (3.19 -19.61%), CEMP (11.89 -16.74%), SPPI (8.41 -15.92%)
• Financial: WETF (14.11 -18.9%), FNFG (8.64 -17.21%)
• Consumer Goods: BDE (10.65 -16.21%)