This week's biggest % winners & losers : Dec 19 - 23, 16 (wk 51)

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: PTLA (25.06 +33.16%),LOXO (34.97 +29.95%),ARWR (1.59 +28.23%),AKBA (10.6 +27.71%),CLVS (45.35 +21.91%),RVNC (21.7 +20.89%),
• Materials:RFP (5.55 +30.59%),DRD (5.22 +18.91%),
• Consumer Discretionary:FRED (20.2 +75.65%),WTW (12.05 +19.43%),
• Information Technology: INVN (12.87 +19.28%),BITA (20.49 +15.44%),MU (23.26 +14.75%),
• Financials:AWH (53.75 +17.43%),
• Energy:PZE (6.48 +35%), KOS (6.93 +20.94%),CVRR (10.65 +19.66%),FMSA (11.32 +16.22%),CRR (10.5 +15.64%),

This week's top 20 % losers

• Healthcare:MACK (4.35 -16.18%),SCMP (13.3 -15.56%),SGMO (3.1 -15.07%),CEMP (6.2 -11.43%),MYGN (16.88 -10.21%),
• Materials:WOR (49.18 -10.97%),
• Industrials:LNN (75.48 -12.18%),ERII (10.67 -10.26%),
• Consumer Discretionary:GNC (10.84 -16.74%),SHLD (8.79 -15.56%),BBBY (40.77 -13.75%),FINL (19.41 -13.46%), ASNA (6.26 -11.83%),WSM (48.65 -11.13%),ANF (11.94 -10.29%),
• Information Technology:NPTN (10.91 -13.41%),TWTR (16.5 -11.43%),RHT (71.01 -11.18%),
• Financials:AMBC (22.83 -12.19%),
• Energy:PGH (1.41 -13.5%),