lindsey, chief economist at staern ag. >>> after the hype, quitter made the debut on the new york stock exchange and a strong one. shares rose 73% in the first day of trading, exceeding the expectations of many. we look at what turned out to be an eventful day. >> reporter: how much is 140 characters worth? the answer is billions. twitter, the upstart social networking site that lets users exchange brief messages, photos and videos went public and became one of the world's most valuable companies. the shares were priced at $26 a piece but jumped to $50 within the first few moments of trade at the new york stock exchange. they settled below that level, it leaves twitter valued in the rage of $30 billion. bigger than the companies listed. >> we've had consistent tremendous growth ross the world, frankly, for the last several years, over 230 million monthly active users. we have a tremendous set of thoughts and strategies to increase the slope of the growth curve. i would consider some of them tactics, some of them broad strategies in service to doing what i refer to as bridging the gap be