 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether the sale of QEP Resources, Inc. NYSE: QEP to Diamondback Energy, Inc. for 0.05 shares of Diamondback common stock for each share of QEP common stock is fair to QEP shareholders. Halper Sadeh encourages QEP shareholders to click here to learn more about their legal rights and options or contact Daniel Sadeh or Zachary Halper at 212 763-0060 or or zhalperhalpersadeh. 