Elephant Talk Extends Gains In #PreMarket On HP Sales Collaboration By: Benzinga via Benzinga August 01, 2014 at 09:28 AM EDT Elephant Talk Communications (NYSE: ETAK) has extended its earlier gains on news it will collaborate with Hewlett-Packard (NYSE: ... Read More >> Related Stocks: Helmerich & Payne Hewlett-Packard Starwood Hotels & Resorts