Biogen Inc. (BIIB)

• Annual Data
• Quarterly Data

• Annual Data
• Quarterly Data

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

The primary reason for the increase in return on equity ratio (ROE) over 2018 year is the increase in profitability measured by return on assets ratio (ROA).

• Annual Data
• Quarterly Data

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

The primary reason for the increase in return on equity ratio (ROE) over 2018 year is the increase in profitability measured by net profit margin ratio.

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

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

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

The primary reason for the increase in return on assets ratio (ROA) over 2018 year is the increase in profitability measured by net profit margin ratio.

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

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

Biogen 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: 2019-02-06), 10-K (filing date: 2018-02-01), 10-K (filing date: 2017-02-02), 10-K (filing date: 2016-02-03), 10-K (filing date: 2015-02-04).

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.