Sovereign wealth funds now account for a tenth of all money committed to private equity, according to new research, with assets of the state-owned investment vehicles expected to swell to $10 trillion (€7 trillion) by 2015.

Aggregate sovereign wealth fund commitments to private equity is between $120bn and $150bn, according to data provider Research and Markets' Sovereign Wealth Fund Review, making up 10% of all available capital to the private equity industry.