This week's biggest % gainers & losers : May 1 - 5, 23 (wk 18)

The following are this week's top percentage gainers and losers, categorized by sectors (over $300 mln market cap and 100K average daily volume).

This week's top % gainers

• Healthcare: IMGN (13.22 +145.27%), PRTA (79 +50.13%), LXRX (3.52 +47.07%), TGTX (34 +36.93%), ASND (94.62 +35.25%), KNSA (13.91 +29.4%), OPK (1.83 +24.49%), ALLO (6.62 +21.82%)
• Materials: BAK (9.83 +25.06%)
• Industrials: HSC (9.20 +33.92%)
• Consumer Discretionary: RUTH (21.38 +32.27%), CVNA (9.03 +30.04%), GRBK (48.01 +28.82%)
• Information Technology: INSG (0.88 +45.35%), LASR (12.69 +44.7%), SHOP (62.4 +28.79%), ITRI (68.16 +27.63%), UIS (3.96 +23.36%)

This week's top % losers

• Healthcare: CYH (3.67 -42.19%), KPTI (2.69 -25%)
• Materials: GLT (3.47 -23.23%)
• Industrials: ATSG (14.94 -26.46%), IEP (38.4 -24.39%), TPIC (9.41 -23.91%)
• Consumer Discretionary: CHGG (10.16 -43.52%), SSTK (51.45 -23.21%)
• Information Technology: TWOU (3.51 -36.73%)
• Financials: PACW (5.84 -42.46%), FHN (10.74 -38.8%), HMST (6.32 -35.25%), FFWM (4.58 -27.27%), TREE (18.65 -21.76%)
• Energy: GTE (6.28 -21.64%)