(Bloomberg) -- Holdings in bond ETFs climbed to records in Europe and the U.S., spurred by ease of trading and the lure of higher yields in emerging markets.

Bond ETFs now manage $428 billion in the U.S. and $150 billion in Europe, according to BlackRock. The iShares Core U.S. Aggregate Bond ETF also became the first fixed-income ETF to surpass $40 billion in assets, the New York-based investment company said.

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