NEW YORK--(BUSINESS WIRE)--Alcoa (NYSE:AA) will hold a conference call on Wednesday, July 8 beginning at 5:00 p.m. EDT to discuss second quarter 2015 results and business developments. The conference call will be webcast live via Alcoa's website, www.alcoa.com, with presentation materials available online at 4:15 p.m. EDT. Conference Call Information Time:   5:00 – 6:00 p.m. EDT   Hosts: Klaus Kleinfeld, Chairman and Chief Executive Officer William Oplinger, Executive Vice President and Chief F