amortization of acquisition related intangibles plus or minus the income tax effect of such adjustments using a statutory tax rate. Adjusted earnings (loss) per diluted share is defined as Adjusted net income (loss) divided by the weighted average number of diluted shares outstanding during the period. The per-share impact of each item is determined by dividing it by the weighted average diluted shares outstanding. These financial measures supplement our GAAP results in evaluating certain aspects of our business. We believe that using these measures improves comparability in analyzing our performance because they remove the impact of items from our operating results that, in our opinion, do not reflect our core operating performance. Management and the board of directors focus on Base Revenue, Net Debt, EBITDAR, Adjusted EBITDAR, Adjusted operating ratio, Adjusted operating income (loss), Adjusted net income (loss), and Adjusted earnings (loss) per diluted share as key measures of our performance and liquidity, all of which are reconciled to the most comparable GAAP financial measures and further discussed below. We believe our presentation of these non-GAAP financial measures is useful to investors and other users because it provides them the same information that we use internally for purposes of assessing our core operating performance.
Base Revenue, Net Debt, EBITDAR, Adjusted EBITDAR, Adjusted operating ratio, Adjusted operating income (loss), Adjusted net income (loss), and Adjusted earnings (loss) per diluted share are not substitutes for their comparable GAAP financial measures, such as total debt, net income (loss), cash flows from operating activities, operating ratio, diluted earnings (loss) per share, or other measures prescribed by GAAP. There are limitations to using non-GAAP financial measures. Although we believe that they improve comparability in analyzing our period to period performance, they could limit comparability to other companies in our industry if those companies define these measures differently. Because of these limitations, our non-GAAP financial measures should not be considered measures of income generated by our business or discretionary cash available to us to invest in the growth of our business. Management compensates for these limitations by primarily relying on GAAP results and using non-GAAP financial measures on a supplemental basis.
Pursuant to the requirements of Regulation G and Regulation S-K, we have provided reconciliations of Base Revenue, Net Debt, EBITDAR, Adjusted EBITDAR, Adjusted operating ratio, Adjusted operating income (loss), Adjusted net income (loss), and Adjusted earnings (loss) per diluted share to the most comparable GAAP financial measures at the end of this press release.
Cautionary Statement Concerning Forward-Looking Statements
Financial information in this press release is preliminary and based upon information available to the Company as of the date of this press release. As such, this information remains subject to the completion of our quarterly review procedures, and the filing of the related Quarterly Report on Form 10-Q, which could result in changes, some of which could be material, to the preliminary information provided in this press release.
This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements are made pursuant to the provisions of the Private Securities Litigation Reform Act of 1995. These statements generally may be identified by their use of terms or phrases such as “seek,” “expects,” “estimates,” “anticipates,” “projects,” “believes,” “hopes,” “plans,” “goals,” “intends,” “may,” “might,” “likely,” “will,” “should,” “would,” “could,” “potential,” “predict,” “continue,” “strategy,” “future” and terms or phrases of similar substance. Forward-looking statements are based upon the current beliefs and expectations of our management and are inherently subject to risks and uncertainties, including the impacts and duration of the COVID-19 pandemic. In addition, there are other risks, some of which cannot be predicted or quantified, which could cause future events and actual results to differ materially from those set forth in, contemplated by, or underlying the forward-looking statements. Accordingly, actual results may differ materially from those set forth in the forward-looking statements. Readers should review and consider the factors that may affect future results