(Bloomberg) -- Money is flooding into exchange- traded funds focused on health care at the fastest rate in at least six years, driven by booming biotechnology and pharmaceutical sectors bringing new products to market.

In 2014, 51 percent of money flowing into U.S. sector- focused ETFs, or $4.06 billion through Feb. 28, was for health- care funds, according to data compiled by Bloomberg. That’s more than two-thirds of the total deposits the funds attracted in all of 2013, and a greater share of total ETF contributions than any time since at least 2008.

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