Yahoo co-founder Jerry Yang at the 2008 Consumer Electronics Show in Las Vegas. Yahoo will gain nearly $8 billion from the Alibaba IPO because of its $1 billion investment in Alibaba 2005. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Alibaba founder and CEO Jack Ma has much to laugh about. Shares in the company opened Friday at $92.70 on the New York Stock Exchange. The company is now valued at more than $200 billion — that's bigger that Amazon and Facebook. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

Twitter announced that it has set a price range for its initial public offering between $17 and $20 per share and hopes to sell 70 million shares. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images