Disappointing earnings revive speculation on Twitter's future

SUN VALLEY, ID - JULY 6: Jack Dorsey, co-founder and chief executive officer of Twitter, attends the annual Allen & Company Sun Valley Conference, July 6, 2016 in Sun Valley, Idaho. Every July, some of the world's most wealthy and powerful businesspeople from the media, finance, technology and political spheres converge at the Sun Valley Resort for the exclusive weeklong conference. Drew Angerer/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==

SAN FRANCISCO: Twitter Inc disappointed investors yet again on July 26 with second-quarter earnings that missed estimates and a lower-than-expected outlook, reviving chatter about a possible sale of the company and the future of chief executive officer Jack Dorsey. 

With the stock falling almost 15% July 27, Twitter shares are down 50% since Dorsey returned last summer to the helm of the social media company he co-founded.