Assets in ETF managed portfolio strategies have grown 30 percent this year as of June 2012, and 48 percent since September 2011, according to a report issued by Morningstar.

Morningstar is currently tracking nearly 490 such strategies from 120 firms with total assets of $50 billion as of June 2012.

According to the Morningstar report, titled ETF Managed Portfolios Landscape Report, this trend is being driven by a number of factors, including growing adoption of the fiduciary model in portfolio management, a growing appetite for some kind of coverage in domestic equities, and aggressive growth by the sector's biggest players.

More from the report is available at the Morningstar website. 

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