MCP files for bankruptcy: http://www.wsj.com/articles/SB10907564710791284872504581069270334872848 In 2010, Molycorp—formerly a unit of Chevron Corp. and bought by private-equity firms in 2008 for $80 million—raised $394 million in a public offering. Then, as prices and its stock market value soared, Molycorp overextended itself and took on debt. #msg-55194118 (from 2010) is still a good read.