...+ We believe discount dollar store retailer Dollar Tree Inc.'s operating strategies and debt repayment will contribute to stable margins and improving credit metrics, despite competitive pressures and potential for sales volatility given continued Family Dollar integration efforts. + The company has demonstrated a commitment to a conservative financial policy, most recently with the repayment of $750 million of unsecured notes on March 1, and credit measures have improved considerably, including debt to EBITDA trending to less than 3x. + We are raising our ratings on Dollar Tree, including our corporate credit rating, to '###-' from '##+'. + The stable outlook reflects our view that credit metrics will remain below 3x and cash flow generation will remain healthy. We also expect company performance will remain positive with ongoing expansion, that should further strengthen Dollar Tree's competitive position in the discount space....