A Year after Lehman's Collapse: What Does Wall Street Look Like?

On September 14, President Barack Obama gave a speech in New York to mark the anniversary of the Lehman Brothers failure. It was a year ago when -- during the course of a single jaw-dropping week -- the investment bank declared bankruptcy; Bank of America took over Merrill Lynch; and the U.S. federal government bailed out American International Group. How has Wall Street changed during the past year, and what will these changes mean for investors? What new financial regulations have been discussed, and how much longer will it take the U.S. economy to emerge from the woods? Knowledge@Wharton posed these and other questions to finance professors Jeremy Siegel and Richard Herring.