(Bloomberg) -- The unprecedented demand for bond ETFs in the U.S. is spreading across the pond as European investors seek an easy way to buy into one of the longest bull runs in credit-market history.

The ETFs, which trade like stocks and can be purchased online, have attracted $35.7 billion this year worldwide, on track to exceed the record $84.9 billion placed last year, according to data compiled by BlackRock. About $14 billion of that was in Europe, the data show.

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