"For every dollar in an ETF, U.S. investors have $12 in mutual funds.
Still, at nearly $900 billion, ETFs are growing faster than funds, their assets doubling over the past four years.....
On a typical day, ETFs make up about one-third of the trading volume on U.S. stock exchanges. Mostly, it's market pros such as managers of mutual and hedge funds trading ETFs to stay agile in fast-moving markets. Say a fund manager has lots of cash and wants to put it to work quickly without committing to specific stocks."
Sunday, December 26, 2010
There is a lot more to ETFs than meets the eye - USATODAY.com: