Overview -- Weak market demand for thermal coal following an unseasonably warm winter may have eroded small Central Appalachian coal producer Xinergy Corp.'s liquidity position and could result in lower 2012 EBITDA than our previous expectations. -- We are placing our ratings on Xinergy, including the 'B-' corporate credit rating, on CreditWatch with negative implications. -- In resolving the CreditWatch placement, we will monitor Xinergy's contracted position, cash f