Over the past 12 months, ETF assets increased $150.27 billion, or 44.8%.
By ETF type, total Domestic Equity ETF assets were $323.6 billion for the month, compared to $311.9 billion in April. Broad-based domestic equity holdings made up $254.8 billion of the May total, while Sector/Industry domestic equity holdings accounted for $68.8 billion.
Global International Equity Index ETFs held $137.4 billion in assets in May, compared to $131.1 billion in April. Bond Index ETF assets were $24.3 billion for the month, up from $23.4 billion.
The value of ETF shares issued in May was $58.8 billion, while shares redeemed were valued at $53.4 billion, according to ICI data. For 2007 ETFs have experienced a net issuance of $26.44 billion.
A detailed breakdown of the monthly ETF data is available at http://members.ici.org/stats/etfdata.xls.