(SOUNDBITE OF BELL RINGING)
STEVE INSKEEP, HOST:
There you have it, the sound of money. Mark Zuckerberg rang the opening bell for the NASDAQ stock exchange this morning. Facebook, his company, is going public today. The company's shares start trading under the ticker symbol FB. And we talked about one of the largest IPOs, initial public offerings, in history with NPR's Steve Henn.
OK. When we say one of the largest in history, how big is it here?