Caledonia Mining Corporation PLC has raised $150 million through a bond offering in the United States to help fund development of its Bilboes gold project in Zimbabwe, a move the company says puts it on track to begin major procurement later this year. The Jersey-based miner said the debt sale attracted strong demand from American investors, with total orders exceeding $600 million. The company initially aimed to raise $100 million but increased the size of the deal twice during marketing, eventually closing on $150 million after underwriters exercised their full option...