KaChing lets investors see and mirror experts’ trades - NYTimes.com

SAN FRANCISCO — The trouble with mutual funds is that investors can feel as though they have put their money in a black box. The 90 million Americans with money in funds know little about fees, what securities their money is invested in and who is in charge.

Daniel Carroll, who started investing when he was 15, thinks he has a way to let average investors learn about investing while experts manage the money. In 2008, he started KaChing, a Web site where 400,000 amateur and professional investors manage virtual portfolios. Others have logged on to see what the investors on the site are doing and make the same trades in their own real portfolios...