shows a reconciliation of ROIC. We present ROIC as management believes this metric is helpful to investors in assessing our ability to generate returns using its invested capital. ROIC is operating income, adjusted, divided by adjusted average invested capital. We adjust operating income for MTM adjustments and settlements and restructuring and other for the same reasons discussed above for pre-tax income. All adjustments to calculate ROIC are intended to provide a more meaningful comparison of our results to the airline industry and other high-quality industrial companies.

The following table shows a reconciliation of adjusted net debt. We use adjusted total debt, including aircraft rent, in addition to long-term adjusted debt and capital leases, to present estimated financial obligations. We reduce adjusted debt by cash, cash equivalents and short-term investments and hedge margin receivable, resulting in adjusted net debt, to present the amount of assets needed to satisfy the debt. Management believes this metric is helpful to investors in assessing the company’s overall debt profile. Management has reduced adjusted debt by the amount of hedge margin receivable, which reflects cash posted to counterparties, as we believe this removes the impact of current market volatility on our unsettled hedges and is a better representation of the continued progress we have made on our debt initiatives.



Glossary of Defined Terms

ASM - Available Seat Mile. A measure of capacity. ASMs equal the total number of seats available for transporting passengers during a reporting period multiplied by the total number of miles flown during that period.

CASM - (Operating) Cost per Available Seat Mile. The amount of operating cost incurred per ASM during a reporting period.

CASM-Ex - The amount of operating cost incurred per ASM during a reporting period, adjusted for aircraft fuel and related taxes, profit sharing, restructuring and other and other expenses, including aircraft maintenance and staffing services we provide to third parties, our vacation wholesale operations and refinery cost of sales to third parties.

Passenger Load Factor - A measure of utilized available seating capacity calculated by dividing RPMs by ASMs for a reporting period.

Passenger Mile Yield or Yield - The amount of passenger revenue earned per RPM during a reporting period.

PRASM - Passenger Revenue per ASM. The amount of passenger revenue earned per ASM during a reporting period. PRASM is also referred to as “unit revenue.”

RPM - Revenue Passenger Mile. One revenue-paying passenger transported one mile. RPMs equal the number of revenue passengers during a reporting period multiplied by the number of miles flown by those passengers during that period. RPMs are also referred to as “traffic.”

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We have market risk exposure related to aircraft fuel prices, interest rates and foreign currency exchange rates. Market risk is the potential negative impact of adverse changes in these prices or rates on our Consolidated Financial Statements. In an effort to manage our exposure to these risks, we enter into derivative contracts