This week's biggest % winners & losers (August 17 - 21, 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

• Healthcare:OMER (20.96 +61.73%),NEOS(24.9 +20.7%),HRTX (35.05 +18.41%),LJPC(29.77 +17.95%),BEAT (13.69 +17.81%),NDRM(25.45 +14.48%),CYBX (66.48 +12.24%)
• Materials:GFI (3.55 +33.96%),AU (8.13 +30.08%),AGI (4.37 +20.72%),SBGL (5.08 +15.19%),BTG (1.28 +12.28%)
• Consumer Discretionary:ZU (17.87 +42.16%),CTRN (27.92 +22.67%)
• Information Technology:HILL (9.69 +78.45%),SPIL (6.43 +16.49%),PLAB (9.02 +14.32%)
• Financials:SQQQ (27.42 +23.35%),NPBC (12.23 +11.69%)
• Telecommunication Services:S (4.71 +12.68%)

This week's top 20 % losers

• Healthcare:NWBO (6.96 -27.27%)
• Materials:RYAM (7.29 -47.82%)
• Industrials:NMM (6.96 -26.74%)
• Consumer Discretionary:SSI (9.82 -42.13%),TEDU (7.76 -39.38%),TUES (5.91 -37.53%),JMEI(11.76 -29.11%),DL (9.59 -25.43%)
• Information Technology:SIXD (1.47 -51.49%),CSIQ (17.4 -29.67%),BZUN (5.65 -26.91%),JKS(16.82 -25.21%)
• Energy:CJES (4.06 -38.58%),BTE (4.49 -34.83%),ANW (8.31 -28.3%),LGCY (5.13 -28.15%),LNCO (2.26 -27.56%),PER (4.31 -26.58%)
• Consumer Staples:ANFI (3.11 -60.13%),TFM (19.69 -33.5%)