Get out your superlatives. The Alibaba IPO is anticipated to be the biggest initial public offering (IPO) in history – with an expected $20 billion offering.

The numbers are staggering. The Chinese e-commerce giant could be valued at $163 billion, not too far Facebook's $200 billion valuation. Its profit margins are above 40 percent and Alibaba accounts for 80 percent of the fast growing Chinese e-commerce market.