Non-GAAP Financial Measures

The following tables show reconciliations of non-GAAP financial measures. The reasons Delta uses these measures are described below. Reconciliations may not calculate due to rounding. 2017 amounts have been recast to reflect the adoption of new accounting standards.

Delta sometimes uses information ("non-GAAP financial measures") that is derived from the Consolidated Financial Statements, but that is not presented in accordance with accounting principles generally accepted in the U.S. (“GAAP”). Under the U.S. Securities and Exchange Commission rules, non-GAAP financial measures may be considered in addition to results prepared in accordance with GAAP, but should not be considered a substitute for or superior to GAAP results. The tables below show reconciliations of non-GAAP financial measures used in this document to the most directly comparable GAAP financial measures

Pre-tax profit, adjusted. We adjust for the following items to determine pre-tax profit, adjusted for the reasons described below:

Mark-to-Market ("MTM") adjustments and settlements. MTM adjustments are defined as fair value changes recorded in periods other than the settlement period. Such fair value changes are not necessarily indicative of the actual settlement value of the underlying hedge in the contract settlement period. Settlements represent cash received or paid on hedge contracts settled during the period. These items adjust fuel expense to show the economic impact of hedging, including cash received or paid on hedge contracts during the period. Adjusting for these items allows investors to understand and analyze our core financial performance in the periods shown.
Investment MTM adjustments. We record our proportionate share of earnings from our equity investments in Virgin Atlantic and Aeroméxico in non-operating expense. We adjust for these MTM adjustments to allow investors to understand and analyze the company’s core financial performance in the periods shown.

Investment MTM adjustments. We record our proportionate share of earnings from our equity investments in Virgin Atlantic and Aeroméxico in non-operating expense. We adjust for these MTM adjustments to allow investors to understand and analyze the company’s core financial performance in the periods shown.

Unrealized gain/loss on investments.We record the unrealized gains/losses on our investments in GOL, China Eastern and Air France-KLM in non-operating expense. Adjusting for these gains/losses allows investors to better understand and analyze our core operational performance in the periods shown.

Acquisition and merger related. We adjust for acquisition and merger related items as they were not part of Delta's continuing operations.

Forward-Looking Statements

Statements in this investor update that are not historical facts, including statements regarding our estimates, expectations, beliefs, intentions, projections or strategies for the future, may be "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. All forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from the estimates, expectations, beliefs, intentions, projections and strategies reflected in or suggested by the forward-looking statements.  These risks and uncertainties include, but are not limited to, the cost of aircraft fuel; the impact of fuel hedging activity including rebalancing our hedge portfolio, recording mark-to-market adjustments or posting collateral in connection with our fuel hedge contracts; the availability of aircraft fuel; the performance of our significant investments in airlines in other parts of the world; the possible effects of accidents involving our aircraft; breaches or security lapses in our information technology systems; disruptions in our information technology infrastructure; our dependence on technology in our operations; the restrictions that financial covenants in our financing agreements could have on our financial and business operations; labor issues; the effects of weather, natural disasters and seasonality on our business; the effects of an extended disruption in services provided by third party regional carriers; failure or inability of insurance to cover a significant liability at Monroe's Trainer refinery; the impact of environmental regulation on the Trainer refinery, including costs related to renewable fuel standard regulations; our ability to retain senior management and key employees; damage to our reputation and brand if we are exposed to significant adverse publicity through social media; the effects of terrorist attacks or geopolitical conflict; competitive conditions in the airline industry; interruptions or disruptions in service at major airports at which we operate; the effects of extensive government regulation on our business; the sensitivity of the airline industry to prolonged periods of stagnant or weak economic conditions; uncertainty in economic conditions and regulatory environment in the United Kingdom related to the likely exit of the United Kingdom from the European Union; and the effects of the rapid spread of contagious illnesses.

Additional information concerning risks and uncertainties that could cause differences between actual results and forward-looking statements is contained in our Securities and Exchange Commission filings, including our Annual Report on Form 10-K for the fiscal year ended December 31, 2017 and our 10-Q for the quarterly period ended March 31, 2018.  Caution should be taken not to place undue reliance on our forward-looking statements, which represent our views only as of July 3

ents.We record the unrealized gains/losses on our investments in GOL, China Eastern and Air France-KLM in non-operating expense. Adjusting for these gains/losses allows investors to better understand and analyze our core operational performance in the periods shown.