(Changes day of week in first paragraph to Thursday) July 29 (Reuters) - Intercontinental Exchange Inc, the owner of the New York Stock Exchange, reported a jump in second-quarter profit on Thursday, helped by the strong performance of its mortgage technology business. Net income attributable to the company more than doubled to $1.25 billion, or $2.22 per share, for the three months ended June 30, from $523 million, or 95 cents per share, a year earlier. Reporting by Niket Nishant in Bengaluru; Editing by Aditya Soni Our Standards: The Thomson Reuters Trust Principles.