This week's biggest % winners & losers : Feb 5 - 9, 18 (wk 6)

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: ATRA (41.70 +26.17%), ARRY (17.15 +15.26%), TBPH (28.15 +14.06%), ENSG (25.69 +14.03%), BCRX (4.95 +13.79%)
• Materials: NAK (1.05 +22.22%)
• Consumer Discretionary: LTRPA (10.05 +18.24%), FOSL (8.47 +13.24%), TRIP (38.58 +12.31%)
• Information Technology: INFN (9.41 +45.44%), LITE (57.4 +27.98%), TWTR (31.51 +21.57%), GRUB (85.54 +21.08%), UIS (9.9 +18.56%), FN (29.53 +18.12%), PRO (31.83 +14.54%), OCLR (6.75 +13.36%)
• Financials: VIRT (28.15 +45.1%), SQQQ (20.45 +12.98%)
• Energy: REI (15.13 +16.12%)

This week's top 20 % losers

• Healthcare: CORT (14.73 -37.21%), PRTA (28.58 -27.83%), NLNK (6.87 -18.7%)
• Materials: KLDX (1.57 -19.49%)
• Consumer Discretionary: IRBT (58.16 -34.37%)
• Information Technology: MTSI (19.01 -37.69%), NQ (2.02 -35.46%), EXTR (10.66 -25.45%), ICHR (21.54 -24.42%), JKS (17.18 -19.98%), IPHI (24.51 -18.3%), MANH (41.5 -18.15%)
• Financials: CBOE (107.19 -20.4%)
• Energy: FET (11.75 -28.13%), NS (24.29 -24.66%), PTEN (18.01 -21.85%), SPN (8.32 -19.77%), NGL (12.75 -19.05%), DNR (1.86 -18.42%)