The iShares U.S. Healthcare ETF offers a more concentrated strategy with 100 holdings, primarily mirroring a benchmark of established American healthcare firms. Fidelity MSCI Health Care Index ETF seeks to track the MSCI USA IMI Health Care Index, which results in a broad portfolio of 334 holdings. If you're trying to decide between these two healthcare ETFs, the decision should be clear: go with the Fidelity Healthcare ETF, FHLC. Should you buy stock in Fidelity Covington Trust - Fidelity Msci Health Care Index ETF right now? Should You Buy a Fidelity or iShares ETF to Profit?