Hilton shares jump in New York Stock Exchange debut 12 December 2013 Last updated at 17:44 Shares in the hotel group Hilton jumped 8% above their $20 offering price after their stock market debut on Thursday. The company raised $2.35bn as part of its initial public offering, making it the biggest share sale by a hotel firm ever. That amount beats Twitter's public share sale earlier this year. Hilton is the world's largest hotel firm. It had been taken private in 2007 by private equity firm Blackstone Group. The share sale comes at a time when the global economy is showing signs of recovery and there has been a pick up in the travel industry.