Delta Air Lines Inc. (DAL)

• Annual Data
• Quarterly Data

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of ROE

	ROE	=	ROA	×	Financial Leverage
Dec 31, 2018		=		×
Dec 31, 2017		=		×
Dec 31, 2016		=		×
Dec 31, 2015		=		×
Dec 31, 2014		=		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the increase in return on equity ratio (ROE) over 2018 year is the increase in financial leverage ratio.

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of ROE

	ROE	=	Net Profit Margin	×	Asset Turnover	×	Financial Leverage
Dec 31, 2018		=		×		×
Dec 31, 2017		=		×		×
Dec 31, 2016		=		×		×
Dec 31, 2015		=		×		×
Dec 31, 2014		=		×		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the increase in return on equity ratio (ROE) over 2018 year is the increase in financial leverage ratio.

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of ROE

	ROE	=	Tax Burden	×	Interest Burden	×	EBIT Margin	×	Asset Turnover	×	Financial Leverage
Dec 31, 2018		=		×		×		×		×
Dec 31, 2017		=		×		×		×		×
Dec 31, 2016		=		×		×		×		×
Dec 31, 2015		=		×		×		×		×
Dec 31, 2014		=		×		×		×		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the increase in return on equity ratio (ROE) over 2018 year is the increase in effect of taxes measured by tax burden ratio.

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of ROA

	ROA	=	Net Profit Margin	×	Asset Turnover
Dec 31, 2018		=		×
Dec 31, 2017		=		×
Dec 31, 2016		=		×
Dec 31, 2015		=		×
Dec 31, 2014		=		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the decrease in return on assets ratio (ROA) over 2018 year is the decrease in asset turnover ratio.

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of ROA

	ROA	=	Tax Burden	×	Interest Burden	×	EBIT Margin	×	Asset Turnover
Dec 31, 2018		=		×		×		×
Dec 31, 2017		=		×		×		×
Dec 31, 2016		=		×		×		×
Dec 31, 2015		=		×		×		×
Dec 31, 2014		=		×		×		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the decrease in return on assets ratio (ROA) over 2018 year is the decrease in operating profitability measured by EBIT margin ratio.

• Annual Data
• Quarterly Data

Delta Air Lines Inc., decomposition of net profit margin ratio

	Net Profit Margin	=	Tax Burden	×	Interest Burden	×	EBIT Margin
Dec 31, 2018		=		×		×
Dec 31, 2017		=		×		×
Dec 31, 2016		=		×		×
Dec 31, 2015		=		×		×
Dec 31, 2014		=		×		×

Based on: 10-K (filing date: 2019-02-15), 10-K (filing date: 2018-02-23), 10-K (filing date: 2017-02-13), 10-K (filing date: 2016-02-05), 10-K (filing date: 2015-02-11).

The primary reason for the increase in net profit margin ratio over 2018 year is the increase in effect of taxes measured by tax burden ratio.