This week's biggest gainers & losers (January 5 - 9, 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:ARNA (5.43 +51.25%),HALO (14.03 +42.87%),CHRS (22.24 +40.58%),BLCM (31.75 +38.89%),KITE (79.14 +30.57%),AXDX (23.55 +26.95%),NBIX (28.29 +23.86%),FGEN (33.9 +23.36%),RGEN (24.24 +20.6%),UNIS (4.08 +20.35%)
• Materials:HMY (2.58 +32.99%),SBGL (9.22 +22.61%),AG (6.24 +19.54%)
• Industrials:EHIC (10.24 +22.34%)
• Consumer Discretionary:JCP (7.91 +25.76%)
• Information Technology:EBIX (21.18 +26%),CMCM (19.21 +24.34%),AMBA (61.83 +21.19%),PDFS (17.5 +19.45%)
• Energy:TNK (6.28 +20.31%)

This week's top 20 % losers

• Healthcare:HQY (20.3 -17.81%)
• Industrials:HEES (21.5 -22.99%),ENPH (11.53 -18.86%),SBLK (5.02 -17.97%)
• Consumer Discretionary:APOL (26.94 -19%)
• Financials:SAN (6.88 -18.29%)
• Energy:BXE (2.86 -22.7%),SD (1.36 -22.29%),SXE (12.68 -21.63%),TESO (10.16 -21.3%),FET (16.77 -19.95%),TGA (3.28 -19.61%),PACD (3.79 -19.53%),CRK (5.66 -19.49%),ECR (5.73 -19.41%),CAK (0.32 -19.01%),WTI (6.11 -17.77%),EXXI (2.85 -17.63%),FMSA (6.11 -17.43%)
• Telecommunication Services:OIBR (2.57 -18.41%)