 Shares of Diamondback Energy Inc. FANG, -0.67 rose 0.7 in premarket trading Wednesday, after the oil and natural gas company announced an agreement to buy all leasehold interest and related assets of FireBird Energy LLC for about 1.59 billion in cash and stock. Under terms of the deal announced late Tuesday, Diamondback will exchange 5.86 million of its common stock, which closed Tuesday at 139.37, and 775 million in cash for the Midland Basin assets. 