Assets held in U.S. exchange-traded funds rose 7.2% in March from the previous month to $806 billion, according to monthly data from State Street Global Advisors released last week. ETFs outpaced the Standard & Poor’s 500 Index, which rose 6%.

Ten of 12 ETF categories rose in March, according to State Street. The size and international categories accounted for 57% of the $54 billion gained overall in March.

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