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The Best Way to Diversify Equity Risk: 2018 Edition

Christine Benz (christine.benz@morningstar.com)

How many investments do you need in your portfolio to be diversified? Can you reasonably buy plain-vanilla core stock and bond index funds and call it a day? Many investors and their financial advisors appear to be examining those questions, as the torrent of asset inflows into ultradiversified total equity and bond index funds suggest.