The stock has rallied hard, however, and is now nearly 8 points ahead of the broader iShares Health Care ETF (IYH) (see chart).

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According to the ETF Finder at ETF Channel, ABBV and UNH collectively make up 6.47% of the iShares Dow Jones U.S. Healthcare Sector Index Fund ETF (IYH) which is up by about 0.9% on the day Tuesday.

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Among the largest underlying components of IYH, in trading today Biogen Idec Inc ( NASD: BIIB) is up about 2.7%, Allergan, Inc ( NYSE: AGN) is up about 1.1%, and Covidien Plc ( NYSE: COV) is up by about 0.9%.

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