This week's biggest % gainers & losers (February 17 - 21, 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: CCIH (23.23 +37.8%), IO (4.01 +31.75%), LOGM (41.65 +28.03%), ELLI (30.52 +23.19%), VHC (19.29 +21.92%), ARRS (29.73 +21%), UCTT (13.39 +20.09%), CRAY (34.5 +20.04%), DDD (80.85 +19.93%)
• Services: ZLC (21.01 +43.77%), OWW (8.93 +31.84%), MCHX (12.21 +26.57%), QUNR (31.46 +26.36%)
• Healthcare: FRX (96.76 +40.14%), RGLS (10.66 +21.97%), AMRI (15.03 +21.21%), PTCT (29.94 +20.37%)
• Basic Materials: NBR (21.99 +22.14%), BAS (22.68 +22.03%), SBGL (7.95 +20.52%)

This week's top 20 % losers

• Utilities: NKA (12.42 -16.05%)
• Technology: SMI (4 -19.89%), ANGI (14.03 -15.91%), TRLA (30.78 -13.76%), OIBR (1.62 -11.11%)
• Services: CONN (33.35 -44.52%), WTW (21.92 -29.35%), FCN (29.69 -19.64%), MM (5.89 -13.38%), GNC (46.88 -12.65%), CHGG (6.36 -12.18%), BJRI (26.02 -10.29%)
• Healthcare: EPZM (30 -10.3%)
• Financial: HAWK (23.2 -16.1%), Z (79.1 -11.79%), ASPS (113.94 -11.34%), EIG (19.85 -10.61%)
• Basic Materials: GDP (12.66 -32.79%), SM (72.82 -16.41%), SDR (8.32 -11.18%)