BOSTON--(BUSINESS WIRE)--Cabot Corporation (NYSE: CBT) today announced results for its second quarter of fiscal year 2015. Key Highlights Margin pressure in Reinforcement Materials and lower project activity in Specialty Fluids led to lower earnings Solid cash flow from operating performance and net working capital reduction Repurchased 300,000 shares during the second fiscal quarter and 1.2 million shares fiscal year-to-date for $56 million                   (In millions, except per share amou