Tractor Supply (TSCO) issued revised guidance, raising its 2011 earnings forecast to a range of of $2.97 to $2.99 per share, up from $2.85 to $2.89 per share. The company said that sales for its fourth quarter were 20.1% higher to $1.24 billion, while same store sales increased 7.6% versus 13.1 percent in the same period last year.