P&I examines how investment managers and hedge funds are using ETFs for portfolio management.
Market share by issuer as of Jan. 31, 2012
Top 5 ETF holdings, in millions, as of Dec. 31, 2011
Number of shares held by hedge fund managers as of Dec. 31, 2011
Top 5 net long and short ETF positions by hedge funds as of Dec. 31, 2011