Among the largest underlying components of XBI, in trading today Biogen Idec Incorporated ( BIIB) is up about 0.9%, and Ariad Pharmaceuticals Incorporated ( ARIA) is up by about 3.3%.
Among the largest underlying components of XBI, in trading today Biomarin Pharma ( NASD: BMRN) is up about 1.8%, Regeneron Pharmaceutical ( NASD: REGN) is up about 0.4%, and Spectrum Pharmaceuticals ( NASD: SPPI) is up by about 4%.
Among the largest underlying components of XBI, in trading today Pharmacyclics, Inc. ( NASD: PCYC) is up about 0.9%, Isis Pharmaceuticals, Inc. ( NASD: ISIS) is up about 3.6%, and Incyte Corporation ( NASD: INCY) is up by about 0.3%.