A record $152 billion of new assets flowed into exchange-traded funds in the first half of 2015, but total asset values slipped as a result of stock market setbacks, according to data provider ETFGI.

According to Deborah Fuhr, its managing partner, net inflows rose from $130 billion during the same period in 2014, but total sums under management fell back slightly over the last month to stand at $2.97 trillion. Total assets peaked at just over $3 trillion at the end of May.