The stable outlook on AUO reflects the company's dominant market share in the above-rail coal business and our expectation that management will maintain a reasonably well-capitalized group, with a 'bbb+' group credit profile. The outlook also reflects the AUO's flexibility in moderating distribution to the parent, and management's target of maintaining the FFO-to-debt ratio above 50% at the AUO level. Given that the group's credit profile caps the rating on AUO, we could lower the rating on AUO if the group were to materially increase leverage on a consolidated basis (such that the FFO-to-debt ratio is less than 25%), indicating a higher risk appetite. AUO's stand-alone credit profile could come under pressure if its FFO-to-debt ratio were to drop below