This week's biggest % winners & losers : Dec 11 -15, 17 (wk 50)

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: SGRY (11.15 +19.89%), GHDX (35.55 +18.46%), TEVA (18.61 +15.88%), ENTA (55.83 +15.35%)
• Materials: FRTA (10.83 +17.97%), GSV (1.66 +17.73%), EXK (2.36 +15.69%)
• Industrials: BW (5.41 +15.11%), NX (24.05 +15.07%)
• Consumer Discretionary: LE (18.5 +17.46%), FRAN (7.08 +15.12%)
• Information Technology: VECO (15.9 +33.61%), VNET (7.67 +20.98%), FNSR (22.05 +20.69%), SCWX (10.08 +18.31%), MELI (318.91 +15.36%)
• Energy: LPG (8.25 +17.19%)
• Consumer Staples: LNCE (46.79 +21.72%)
• Telecommunication Services: CTL (16.99 +15.81%)

This week's top 20 % losers

• Healthcare: ONCE (46.37 -36.81%), JUNO (44.68 -23.82%), GBT (36.25 -20.68%), KPTI (9.24 -16.83%), ARAY (4.15 -15.31%), AGIO (52.12 -14.52%), NTLA (18.37 -13.43%)
• Industrials: GRAM (2.75 -15.12%), ABM (37.36 -13.78%)
• Consumer Discretionary: PIR (4.11 -21.56%)
• Information Technology: CRTO (22.68 -27.77%)
• Energy: NAT (2.71 -26.16%), OAS (7.84 -22.07%), BRS (12.32 -13.3%)
• Consumer Staples: SAFM (143.31 -15.76%), CASY (106.23 -14.89%), PPC (32.14 -13.49%)
• Telecommunication Services: FTR (8.08 -17.13%), GSAT (1.15 -13.53%)