Wall St is aflutter over Twitter, which is this week set to make the most anticipated stock market debut since Facebook in a huge test for social media and the technology sector.
Twitter - which has made big losses in the last three years - will seek to raise US$1.6 billion ($1.9 billion).
No official date has been set, but Twitter appears on a fast track which could see its initial public offering priced as early as Wednesday (Thursday NZT) for trading the day after, according to some reports.
The company will trade as TWTR on the New York Stock Exchange, breaking from the Nasdaq market used by many tech companies.
There is considerable excitement about the IPO because Twitter is "a unique product that no one can replicate", said Michael Pachter, head of equity research at Wedbush Securities.