This week's biggest % winners & losers : Dec 17 - 21, 18 (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: CIVI (17.46 +18.94%)
• Materials: CDE (4.57 +19.63%), AGI (3.53 +18.86%), AUY (2.34 +10.38%), PVG (8.19 +10.38%), BVN (16.09 +9.16%), KGC (3.12 +8.33%), AG (5.55 +7.77%), RGLD (82.54 +7.73%), FSM (3.55 +7.25%), OR (8.4 +7.14%), HMY (1.71 +6.87%)
• Industrials: ABM (30.19 +16.56%), ATSG (20.28 +15.49%)
• Consumer Discretionary: TTM (12.37 +7.29%)
• Information Technology: JBL (23.4 +7.14%)
• Financials: LION (24.88 +16.15%)

This week's top 20 % losers

• Healthcare: GTHX (17.01 -44.25%), AXGN (17.09 -40.24%), SPPI (7.24 -37.48%), EDIT (18.19 -36.06%), PRGO (37.03 -35.02%), AKBA (5.42 -28.96%)
• Energy: BPT (18.37 -32.69%), CRC (14.82 -29.29%)
• Telecommunication Services: CBB (6.7 -28.27%)
• Consumer Staples: CAG (22.15  -25.89%)