Just as the Dow Jones Industrial Average tracks the health of publicly traded companies, SharesPost Financial Corp. announced that it's creating its own index, aiming to track the health of private companies. In this video, CEO Greg Brogger explains the rationale behind the SharesPost Index. Brogger also chats about what the Facebook Inc. initial public offering will mean for secondary markets. "We don't expect another company like that to appear for some time," he says. However, he points out that although the JOBS Act can make it easier for emerging-growth companies to IPO, it also gives them the option to remain private longer, with the expansion of the 500-shareholder rule to 2,000. - Katie Roof