...Aurizon Operations Ltd. (AUO) has an established position in the above-rail haulage markets, but a narrow product and customer base. With a strong market share in Queensland and presence in New South Wales, AUO hauls over 250 million tons a year. However, after the group's exit from the intermodal business and cessation of two iron ore haulage contracts, the business is highly exposed to coal haulage. Somewhat mitigating this risk is continuing demand for high-quality Australian coal and the presence of a higher proportion of take-or-pay charges (capacity-like charges), reducing the impact on revenue due to variations in haulage volumes. AUO's minimum leverage supports its stand-alone credit profile. We believe that AUO will increase debt progressively to reach a target funds from operations (FFO)-to-debt ratio of over 50%. The currently low leverage levels provide the company with some flexibility to manage its capital structure and increase leverage over the next two to three years. We...