(Bloomberg)—Pinterest Inc. rose as much as 32% in its trading debut after raising $1.4 billion in the second-biggest U.S. initial public offering of the year. Shares of the digital-scrapbooking company opened at $23.75. They were up 30% to $24.79 at 2:49 p.m. in New York trading Thursday, giving the company a market value of about […]