NYSE President Thomas Farley appeared on CNBC's " Squawk Box" on Friday, ahead of the start of trading of Alibaba.. Read More LiveBlog: Alibaba, the biggest IPO ever. Mobbed by the press, Alibaba founder Jack Ma arrived at the exchange Friday morning, as market makers inside were preparing to open trading on the stock, which is expected between 10 a.m. ET and 11 a.m. ET.