This week's biggest % winners & losers (January 15 - 20, 2017)

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

• Materials:CENX (13.74 +19.27%),CX (8.84 +10.92%)
• Industrials:CSX (43.97 +13.32%),GOGL (5.49 +9.58%)
• Consumer Discretionary:MMYT (30.1 +9.45%),STON (11.45 +8.74%)
• Information Technology:SWKS (88.49 +12.97%),OCLR (9.37 +10.37%),WNS (29.54 +8.96%)
• Financials:GCAP (7.34 +8.74%)
• Energy:CWEI (146.85 +41.23%),SN (13.21 +17.53%),LPG (10.82 +15.85%),OSG (5.45 +13.07%),TK (10.16 +12.89%),TGP (17.05 +11.8%),DHT (4.4 +10.28%)
• Consumer Staples:UVV (75 +12.44%)
• Utilities:NRG (16.11 +10.34%),ABY (21.65 +9.29%)

This week's top 20 % losers

• Healthcare:BIOS (1.26 -22.7%),SGMO (3.68 -16.48%),TGTX (4.2 -15.15%),BIOB (0 -14.29%),SRPT (32.65 -13.69%),KERX (5.44 -13.18%),BMY (49.23 -12.43%),ARWR (1.81 -12.14%),SGYP (5.93 -11.89%),AIMT (18.82 -11.52%)
• Consumer Discretionary:PSO (7.23 -27.19%),EVC (5.1 -20.93%),RCII (8.39 -19.3%),GNC (9.47 -17.08%),TUES (4.45 -16.82%)
• Information Technology:GIMO (34.2 -24.59%),PRGS (28.13 -12.78%)
• Energy:CCJ (11.74 -11.66%),TESO (8.35 -11.64%)
• Consumer Staples:RAD (7.22 -16.63%)