Shale development deal between Bridas and Argentina's YPF expires -YPF
August 29, 2013 at 19:22 PM EDT
BUENOS AIRES, Aug 29 (Reuters) - A preliminary deal between Argentina's state-controlled energy company YPF and privately held Bridas International to jointly invest $1.5 billion to develop shale resources has expired, YPF's chief executive said on Thursday.
