FILE PHOTO: Jack Ma, chairman and then-chief executive officer of Alibaba Group Holding Ltd., laughs at a news conference in Hong Kong, China, on Tuesday, Nov. 6, 2007. Alibaba, which rode China's emergence as an economic superpower over the last 15 years to become a massive online marketplace for everything from forks to forklifts, filed today for what could become the largest U.S. initial public offering ever. Photographer: Daniel J. Groshong/Bloomberg via Getty Images