A relatively new category of exchange-traded fund is poised to hit it big, according to Greenwich Associates. Institutional investment in so-called liquid alternative ETFs—including products that seek to mirror hedge funds—will more than double to $114 billion during the next 12 months, analysts led by Andrew McCollum wrote in a report Monday. The study was commissioned by IndexIQ, part of New York Life Investment Management, which runs two of the largest ETFs with hedge fund-like strategies, data compiled by Bloomberg show.