 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether Change Healthcare Inc. NASDAQ: CHNG and its board of directors violated the federal securities laws andor breached their fiduciary duties to shareholders in connection with the proposed sale of Change Healthcare to Optum, a company that is part of UnitedHealth Group. Under the merger agreement, Change Healthcare shareholders will receive 25.75 per share in cash. On behalf of Change Healt 