This week's biggest % winners & losers (December 21 - December 24, 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

• Materials:TROX (4.77 +59%),HMY (1.03 +35.53%),CENX (4.77 +34.75%),TCK (4.07 +30.87%),TMST (9.2 +28.31%)
• Information Technology:ROVI (15.75 +42.88%)
• Energy:TOO (6.5 +72.87%),GMLP (13.74 +58.66%),TGP (13.79 +53.05%),ENBL (9.72 +45.73%),TK (10.03 +37.96%),NGL (11.14 +37.36%),EPE (4.74 +36.21%) CQP (27.49 +34.03%),UPL (2.69 +33.17%),SWN (6.71 +30.29%),PAGP (9.89 +27.94%),AHGP (21 +27.5%),OKS (28.88 +27.06%)
• Utilities:DYN (13.03 +27.12%)

This week's top 20 % losers

• Healthcare:MCRB (35.51 -16.45%),NWBO (3.56 -15.45%),GEN (3.59 -11.58%),EGRX (87.55 -9.57%)
• Industrials:SCS (14.65 -23.34%),GOL (0.6 -22.44%),SCTY (51.99 -9.2%),KNL (18.68 -8.52%),DY (73.4 -7.43%)
• Consumer Discretionary:AYA (12.61 -10.88%),CMG (495.1 -10.78%),FLWS (7.32 -7.81%),IMAX (36.09 -7.7%),AMC (23.25 -7.52%)
• Information Technology:GLUU (2.51 -15.77%),P (13.92 -8.78%),GLOB (34.71 -8.17%)
• Energy:ATW (10.98 -9.63%),RDC (17.47 -7.52%)
• Telecommunication Services:GSAT (1.49 -7.45%)