Traders Work at NYSE During Twitter's IPO Last Year

Traders Work at NYSE During Twitter's IPO Last Year

Scott Eells/Bloomberg

Traders work on the floor of the New York Stock Exchange during Twitter Inc.'s initial public offering on Nov. 7, 2013. With last year’s debuts from Twitter Inc. and Zulily Inc. also helping send U.S. IPOs to their biggest first-day gains since 2000, warnings of another asset bubble are again echoing across Silicon Valley.