This week's biggest % gainers/losers (December 9 - December 13, 2013)

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

• Utilities: UNS (58.94 +24.2%)
• Technology: TWTR (59 +21.28%), GSAT (1.97 +15.7%), GRPN (10.24 +14.41%), LOGI (12.63 +12.03%), RMBS (9.54 +11.8%)
• Services: WBAI (31.57 +33.45%), GTN (13.57 +13.39%), AER (24.93 +13.26%), ZLC (14.48 +12.79%), RBA (21.95 +11.9%), MEG (21.73 +11.88%)
• Healthcare: ENTA (37.16 +33.36%), GIVN (29.89 +27.54%), RLYP (25.92 +25.36%), MDXG (7.77 +15.77%), SEM (9.73 +15.28%), KPTI (19.96 +13.54%)
• Financial: NRF (11.86 +17.58%), EJ (13.9 +17.25%)

This week's top 20 % losers

• Technology: RALY (16.65 -32.13%), SEAC (11.43 -22.01%), NIHD (1.93 -20.16%), NQ (12.1 -18.54%), LMOS (22.33 -16.77%), SUNE (11.46 -14.78%)
• Services: ULTA (91.93 -22.68%), GASS (10.57 -17.87%), BIG (30.92 -16.46%)
• Industrial Goods: OSIS (52.08 -29.38%)
• Healthcare: AVNR (2.84 -24.64%), GERN (4.77 -18.57%), ARRY (5 -18.46%), PCYC (107.88 -16.46%)
• Financial: AFSI (33.64 -16.72%), RSE (20.91 -14.94%)
• Basic Materials: IOC (54.64 -38.56%), TPLM (9.12 -17.15%), MTDR (18.67 -15.19%), NFX (23.36 -14.97%)