Greenlight Capital has disclosed a stake in Cairn Energy PLC (LON:CNE) a United Kingdom Energy Oil and Gas Exploration Company. Einhorn's hedge fund now holds 3.06% of the company, just over the amount that requires regulatory disclosure. The deal seems to have been done at the beginning of February after a return of $3.5bn to shareholders following the sale of a stake in Cairn India to Vendanta Resources PLC (LON:VED) a minerals and...