1. The Alibaba IPO One of the most feverishly anticipated tech stock IPOs lived up to its first day hype as Alibaba raised $21 billion and passed Facebook’s market capitalization on its first trade. + The NYT Dealbook takes you to Hangzhou: The city that minted thousands of Internet millionaires (and launched a whole lot of other Internet startups). + Yahoo owns a big chunk of Alibaba stock.